Hitachi RAS-(3-6)HVRNM2E Service Manual
  1. Manuals
  2. Brands
  3. Hitachi Manuals
  4. Air Conditioner
  5. RAS-(3-6)HVRNM2E
  6. Service manual

Hitachi RAS-(3-6)HVRNM2E Service Manual

Utopia dc-inverter ivx/(2/2.5)hp/es series air conditioner
Hide thumbs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
Table Of Contents
489
Table of Contents

Advertisement

Quick Links

UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES
H(V)RN(S)(2)(E)
H(V)RNM(2)(E)

Service Manual

RAS-(3-6)HVRNM2E
RAS-(4-12)HRNM(2)(E)
RAS-(2-3)HVRN(S)(2)
RAS-(4-10)HRNS(2)E

Advertisement

Table of Contents
loading

Related Manuals for Hitachi RAS-(3-6)HVRNM2E

Summary of Contents for Hitachi RAS-(3-6)HVRNM2E

  • Page 1: Service Manual

    UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES H(V)RN(S)(2)(E) H(V)RNM(2)(E) Service Manual RAS-(3-6)HVRNM2E RAS-(4-12)HRNM(2)(E) RAS-(2-3)HVRN(S)(2) RAS-(4-6)HVRNS2E RAS-(4-10)HRNS(2)E...
  • Page 3 Index I n d e x General information Unit Installation Piping work and refrigerant charge Electrical Wiring Control System Optional functions Test Run Troubleshooting Spare Parts Servicing Electrical checks of main parts Maintenace notes SMGB0064 rev.0 - 08/2011...
  • Page 4 Index SMGB0064 rev.0 - 08/2011...

  • Page 5: Table Of Contents

    Contens Contents 1. General information ....................... 1 1.1 General information ............................ 2 1.1.1 General note ..............................2 1.1.2 Introduction ..............................2 1.1.3 Environment-friendly units ..........................2 1.2 Applied symbols ............................3 1.3 Product guide ............................. 4 1.3.1 Classification of IVX series outdoor unit models ..................... 4 1.3.2 Classification of ES series outdoor unit models ....................

  • Page 6: Table Of Contents

    Contens 3.2.1 Piping Materials ............................. 52 3.2.2 Three principles on refrigerant piping work ....................54 3.2.3 Suspension of refrigerant piping ........................54 3.2.4 Brazing work ..............................55 3.2.5 Refrigerant charge ............................56 3.2.6 Caution of the pressure by check joint ......................56 3.2.7 Refrigerant charge quantity ...........................

  • Page 7: Table Of Contents

    Contens 5. Control System ......................117 5.1 Device control system..........................118 5.1.1 Device control system for IVX Series ......................118 5.1.2 Device control system for ES Series ......................120 5.2 Outdoor units PCB ..........................122 5.2.1 Outdoor units PCB for IVX Series ....................... 122 5.2.2 Outdoor units PCB for ES Series ........................

  • Page 8: Table Of Contents

    Contens 8.1.3 Abnormal transmission between the remote control switch and the indoor unit .......... 198 8.1.4 Abnormal operation of the devices ......................198 8.2 Troubleshooting procedure for IVX an ES Series ................... 204 8.2.1 Alarm code ..............................204 8.2.2 Troubleshooting in check mode ........................283 8.2.3 Troubleshooting by means of the 7-segment display ..................

  • Page 9: Table Of Contents

    Contens 11.6 Capacitor (CB1 CB2) ..........................457 11.7 Reactor (DCL) ............................458 11.7.1 Reactor (DCL) for 3N~ ..........................458 11.7.2 Reactor (DCL) for 1~ ..........................458 11.8 Scroll compressor ..........................459 11.8.1 Reliable mechanism for low vibrating and low sound ................459 11.8.2 Principle of compression ...........................
  • Page 10 Contens SMGB0064 rev.0 - 08/2011...

  • Page 11: General Information

    1 General information G e n e r a l i n f o r m a t i o n Index 1.1. General information ..........................2 1.1.1. General note ..............................2 1.1.2. Introduction ..............................2 1.1.3. Environment-friendly units ........................... 2 1.2.
  • Page 12 1.1.2  Introduction Hitachi UTOPIA series is an outdoor unit series designed with the goal to cover the requirements of the split and multisplit systems, for installations where from one indoor unit (single system) to up to four indoor units (quad system) are connected to the same outdoor unit.

  • Page 13: Applied Symbols

    1 General information 1.2 Applied symbols During normal air conditioning system design work or unit installation, greater attention must be paid in certain situations requiring particular care in order to avoid damage to the unit, the installation or the building or property. Situations that jeopardise the safety of those in the surrounding area or that put the unit itself at risk will be clearly indicated in this manual.

  • Page 14: Product Guide

    1 General information 1.3 Product guide 1.3.1  Classification of IVX series outdoor unit models Unit type (Outdoor unit): RAS Position-separating hyphen (fixed) Capacity (HP): 3, 4, 5, 6, 8, 10, 12 H = Heat Pump V = Single phase unit (1~ 230V 50Hz) - = Three phase unit (3N~ 400V 50Hz) R= Inverter system N=R410A refrigerant M=IVX...

  • Page 15: Product Guide: Outdoor Units

    1 General information 1.3.3  Product guide: Outdoor units    IVX series  Outdoor Units IVX Single phase (1~) Three phase (3~) HVRNM2E HRNM1E HRNM Unit Code Unit Code Unit Code Unit Code RAS-3HVRNM2E 7E305018 RAS-4HVRNM2E 7E305020 RAS-4HRNM2E 7E305120 RAS-5HVRNM2E 7E305021 RAS-5HRNM2E 7E305121 RAS-6HVRNM2E 7E305022 RAS-6HRNM2E 7E305122...

  • Page 16: Accessory Code List

    Snow protection hood; air inlet of left side (Stainless plate) (For 8-12HP IVX ) N O T E HITACHI has a range of accessories and remote control systems that can be used with the UTOPIA outdoor units. Please, refer to the Controls Technical Catalogue.+...

  • Page 17: Unit Installation

    2 Unit Installation U n i t I n s t a l l a t i o n Index 2.1. Safety summary ............................8 2.2. Transportation of outdoor unit ......................... 9 2.3. Center of gravity ............................ 10 2.4. Factory-supplied accessories for RAS-(8-12)HRNM................11 2.5.

  • Page 18: Smgb0064 Rev.0

    2 Unit Installation 2.1 Safety summary D A N G E R • Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next pages. • Install the outdoor unit where good ventilation is available. •...

  • Page 19: Test Run.

    2 Unit Installation 2.2 Transportation of outdoor unit D A N G E R Do not put any foreign material into the outdoor unit and check to ensure that none exists in the outdoor unit before the installation and test run. Otherwise a fire or failure will occur. Hanging Method When hanging the unit ensure the balance of the unit check safety and lift it up smoothly.

  • Page 20: Center Of Gravity

    2 Unit Installation 2.3 Center of gravity Hanging Method When hanging the unit ensure the balance of the unit check safety and lift it up smoothly. Do not remove any packing materials and hang the unit under packing condition with two ropes as shown below. At leat two persons are needed to move the unit.

  • Page 21: Factory-Supplied Accessories For Ras-(8-12)Hrnm

    2 Unit Installation 2.4 Factory-supplied accessories for RAS-(8-12)HRNM Make sure that the following accessories are packed with the unit. N O T E • If any of these accessories are not packed with the unit please contact your dealer. Quantity Accessory Appearance RAS-8HRNM...

  • Page 22: Installation Space (Initial Ckeck)

    2 Unit Installation 2.5 Installation space (Initial ckeck) 2.5.1  RAS-3HVRNM2E / RAS-(2-3)HVRN(S)2 / RAS-(4-10)H(V)RNS2E Blocked in Inlet Side Upper Side Open Single Installation Multiple Installation (Two units or more) Pipe Cover Pipe Cover Allow 250 mm of space between units. Leave open both right and left Ensure 250 mm or more of the side space on the pipe cover side.
  • Page 23 2 Unit Installation Blocked in Inlet Side The length A is as show in the following table: 0<L=1/2H 500 or greater 1/2H<L≤H 1000 or greater When L > H use a base for outdoor unit to make L ≤ H. Close the base not to allow the outlet air bypassed.
  • Page 24 2 Unit Installation Lateral Side Blocked Upper Side Open Single Installation Pipe Cover Pipe Cover Ensure 250 mm or more of the side space on the pipe cover side. Ensure 250 mm or more of the side space on the pipe cover side. Upper Side Blocked Pipe Cover Pipe Cover...
  • Page 25 2 Unit Installation Single Installation Multiple Installation Blocked in Inlet Side Pipe Cover Pipe Cover Allow 250 mm of service space between units. Serial sideways installa- tion allowed up to two units. Close the part A not to allow the outlet air bypassed. Install to avoid the Leave open both right and left sides.

  • Page 26: Ras-(4-6)H(V)Rnm2E / Ras-(8/10)Hrnse

    2 Unit Installation 2.5.2  RAS-(4-6)H(V)RNM2E / RAS-(8/10)HRNSE Blocked in Inlet Side Upper Side Open Single Installation Multiple Installation (Two units or more) Allow 100 mm of space between units. Leave open both right and left 100 mm or more of the side space is acceptable on the service cover sides.
  • Page 27 2 Unit Installation Blocked in Inlet Side The length A is as shown in the following table: 0 < L ≤ 1/2H 600 or greater 1/2H < L≤ H 1200 or greater Be sure to use the fan direction guide. Allow 100 mm of space between units. Leave open both right and left sides. Serial installation allowed up to two units.
  • Page 28 2 Unit Installation Lateral Side Blocked Upper Side Open Single Installation Upper Side Blocked Stack installation (allowed up to 2 Units) Upper Side Open Single Installation Multiple Installation Allow 100 mm of space between units. Serial sideways installation Close the part A not to allow the outlet air bypassed. Install to avoid the allowed up to two units.
  • Page 29 2 Unit Installation Multiple Installation in Multiple Rows Serial Installation in Multiple Rows (E.g. Rooftop) Allow approx. 100 mm of space from the side unit. Leave open both right and left sides. The length A is as shown in the following table: 0 <...

  • Page 30: Ras-(8-12)Hrnm

    2 Unit Installation 2.5.3  RAS-(8-12)HRNM Single installation Around sides are open Around sides are open with obstacles above Around sides are closed Around sides are open with obstacles above Multiple installation Around sides are open Around sides are open with obstacles above Multi-Row SMGB0064 rev.0 - 08/2011...
  • Page 31 2 Unit Installation N O T E • All units are in mm. • Do not stack more than two units in the height. • If L is larger than H mount the units on a base so that H is equal or greater than L. H: Unit height (1650 mm) + base concret height 0 <...

  • Page 32: Place Provision

    2 Unit Installation 2.6 Place provision 2.6.1  Place provision for RAS-(3-12)H(V)RNM(2)(E) and RAS-(4-10)H(V)RNS(2)E    Concrete foundation • Foundation could be on flat and it is recommended to be 100-300 mm higher than ground level. • Install a drainage around foundation for smooth drain. • When installing the outdoor unit fix it by M10 anchor bolts.
  • Page 33 2 Unit Installation Recommended Metal Plate Size • (Field-Supplied) Material: Hot-Rolled Mild Steel. • Plate (SPHC) Plate Thickness: 4.5 T.    Example of fixing outdoor unit by anchor bolts 1. Max. 21 mm (After cut “A”) 2. Concrete 3. Anchor bolt B. Cut this portion when this type of anchor bolt is used. If not done it will be dificult to remove the service cover ...
  • Page 34 2 Unit Installation    Suspended unit 1 Suspend the unit as shown in the figures. 2 Ensure that wall can withstand the weight of the outdoor unit indicated on the specifications plate. 3 It is advisable that each foot support should bear the full weight of the unit (in order take account of applied stress fatigue when unit is operating).

  • Page 35: Place Provision Only For Ras-(2-3)Hvrn(S)2

    2 Unit Installation    Installing location where the unit will be exposed to strong wind Follow the instructions below to install on the roof or in a place which is not surrounded by buildings and where the product may be buffeted by strong winds. 1 Select a place where the input or outlet side of the product is exposed to strong winds. 2 When the outlet is exposed to strong winds: Strong direct winds may cause a lack of air flow and negative effects on the unit operation.
  • Page 36 2 Unit Installation 3 Example of fixing outdoor unit by anchor bolts. 1. Max. 17 mm (After cut “A”) 2. Concrete 3. Anchor bolt B: Cut this portion when this type of anchor bolt is used. If not done it will be difficult to remove the service cover 4 Provide an adequate drainage around the foundation.
  • Page 37 2 Unit Installation Installing location where the unit will be exposed to strong wind Follow the instructions below to install on the rooftop or a location without surrounding buildings where strong wind is ex- pected against the product. 1 Choose a location where the outlet or inlet side of the product will not be exposed to strong wind.

  • Page 38: Optional Parts And Installation

    2 Unit Installation 2.7 Optional parts and installation 2.7.1  Optional parts and installation for RAS-(2-3)HVRN(S)2    Air flow guide wind guard and snow protection hood Optional parts Model Air flow guide AG-264 Wind guard WSP-264 Air outlet ASG-NP80F Zinc Plate Air inlet of rear side ASG-NP56B Air inlet of side face ASG-NP56L Air outlet ASG-NP80FS2...
  • Page 39 2 Unit Installation Locations of fixing holes The holes Location shall be made by using self-screws (M4x13) and later shall be used SUS screw (M5x12) for fixing air flow gui- 1 Outdoor Unit 2 Hole (4 locations) One flow guide installation Air discharge grille Air flow 3 Outdoor unit...

  • Page 40: Specifications

    2 Unit Installation    Wind guard Specifications Model WSP-264 Quantity 1 per unit Material Galvanized sheet metal + baked painting Color UTOPIA Beige Weight 4.0 kg Fixing screw x 4 [M5 (SUS) x 30]- Unit Accessories Fixing Screw x 10 [M5 (SUS) x 12]- Wind Ward Installation manual Installation “Guard net”...
  • Page 41 2 Unit Installation    Snow protection hood Air discharge hood Nº Part name Quantity Right side plate Left side plate Front panel Fixing screw (Accessories) Hole for safety wire rope to prevent overturning Rear suction hood Nº Part name Quantity Right side plate Left side plate Upper front panel (Upside)
  • Page 42 2 Unit Installation Attaching example of snow protection hood 1. Fixing screw (accessories) 2. Air inlet hood 3. Wire rope (optional for over turning protection) 4. Air discharge hood 5. Outdoor unit A. Rear side B. Left side C Front side N O T E •...

  • Page 43: Optional Parts And Installation Ras-3Hvrnm2E / Ras-(4-6)H(V)Rns2E

    2 Unit Installation 2.7.2  Optional parts and installation RAS-3HVRNM2E / RAS-(4-6)H(V)RNS2E    Air flow guide wind guard and snow protection hood Optional parts Model Air flow guide AG-335A Wind guard WSP-335A Air outlet ASG-NP335F Air inlet of rear side ASG-NP80B Zinc plate Air inlet of side face ASG-NP80L Air outlet ASG-NP335F52 Air inlet of rear side ASG-NP160BS2 Snow protection hood...
  • Page 44 2 Unit Installation One flow guide installation 1 Air discharge grille 2 Air flow 3 Air flow guide Outdoor unit 5 M5 fixing screw x4 (Accessories) Service space (In case of upward air discharge) • In case of right and left sides air discharge enough space for air discharge is required.
  • Page 45 2 Unit Installation Attaching example of air wind guard • Attach the air flow guide to the air discharge grille with four (4) screws (supplied). • The fixing holes are located at 4 positions on the grille. (Screw tightening torque 2.4 3.1 N.m) •...
  • Page 46 2 Unit Installation Rear suction hood Nº Part name Quantity Right side plate Left side plate Upper front panel (Upside) Upper front panel (Downside) Fixing screw (Accessories) Hole for safety wire rope to prevent overturning Left suction hood Nº Part name Quantity Right side plate Left side plate...

  • Page 47: Optional Parts And Installation Ras-(4-6)H(V)Rnm2E / Ras-(8/10)Hrnse

    2 Unit Installation C. Rear side Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood Model ASG-NP335F ASG-NP335FS2 ASG-NP80B ASG-NP160BS2 ASG-NP80L ASG-NP160LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel Bonderized steel Stainless Stainless (NSSC...
  • Page 48 2 Unit Installation    Air flow guide Specifications Model AG-335A Image Quantity 2 per unit Air discharge Upward (downward) direction left & right Weather proof Material polypropylene resin Color Gray Weight 1.9 kg Fixing screw x 4 Accessories [M5 (SUS) x 20] Installation manual “Wind Guard”...
  • Page 49 2 Unit Installation    Wind guard Specifications Model WSP-335A Quantity 2 per unit Galvanized sheet metal + Material baked painting Color Gray (1.0Y8.5/0.5) Weight 5.5 kg Fixing screw Accessories x 4 [M5 (SUS) x 12] Installation manual Installation “Guard net” “Air flow guide” or “Snow protection restriction hood”...
  • Page 50 2 Unit Installation Service space • Both sides of the outdoor unit should be open. • No obstacles should be placed in the air discharge side. 1 Min. 200 mm 2 Outdoor unit 3 Wind guard    Snow protection hood Air discharge hood Nº...
  • Page 51 2 Unit Installation Attaching example of snow protection hood 1. Left suction hood 2. Fixing screw (Accessories) 3. Rear suction hood Upper side 4. Wire rope (Optional. For overturning protection) 5. Rear suction hood Lower side 6. Air discharge hood 7.

  • Page 52: Optional Parts And Installation Ras-(8-12)Hrnm

    2 Unit Installation Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood ASG- Model ASG-NP335F ASG-NP335FS2 ASG-NP280B ASG-NP280BS2 ASG-NP280L NP280LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel Bonderized steel Stainless Stainless Stainless...
  • Page 53 2 Unit Installation    Air flow guide Specifications Model AG-335A Quantity 2 per unit Air discharge Upward (downward) left & right direction Material Weather proof polypropylene resin Color Gray Weight 1.9 kg Fixing screw x 4 [M5 (SUS) x 20] Accessories Installation manual “Wind Guard”...
  • Page 54 2 Unit Installation    Wind guard Specifications Model WSP-335A Quantity 2 per unit Galvanized sheet metal + Material baked painting Color Gray (1.0Y8.5/0.5) Weight 5.5 kg Fixing screw x 4 Accessories [M5 (SUS) x 12] Installation manual “Guard net” “Air flow guide” or “Snow Installation restriction protection hood”...
  • Page 55 2 Unit Installation Service space • Both sides of the outdoor unit should be open. • No obstacles should be placed in the air discharge side. 1 Min. 200 mm 2 Outdoor unit 3 Wind guard    Snow protection hood Air discharge hood Nº...
  • Page 56 2 Unit Installation Left suction hood Nº Part name Quantity Right side plate Left side plate Front panel (upside) Front side (downside) Fixing hole x 2 Fixing screw (Accessories) Ø15 Attaching example of snow protection hood 1100 1. Left suction hood 2.
  • Page 57 2 Unit Installation A. Front side B. Left side C. Rear side Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood ASG- Model ASG-NP335F ASG-NP335FS2 ASG-NP335B ASG-NP335BS2 ASG-NP335L NP335LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel...
  • Page 58 2 Unit Installation SMGB0064 rev.0 - 08/2011...

  • Page 59: Piping Work And Refrigerant Charge

    3 Piping work and refrigerant charge P i p i n g w o r k a n d r e f r i g e r a n t c h a r g e Index 3.1. General notes ............................50 3.2.

  • Page 60: General Notes

    3 Piping work and refrigerant charge 3.1 General notes C A U T I O N Do not install the drain-pipe in an up-slope position. Installing it like this, the drain water cannot be evacuated and will flow back to the unit, causing a possible leakage when the operation is stopped. Always install the unit higher than the exit of the pipe.
  • Page 61 3 Piping work and refrigerant charge Checking the unit with the drain-up mechanism and the float switch 1 Turn the power supply on. 2 Pour approximately 1.8 litres of water into the drain pan. Then, the float switch will be activated. Next, the drain pump will start working automatically.

  • Page 62: Piping Work Connection Considerations

    3 Piping work and refrigerant charge 3.2 Piping work connection considerations 3.2.1  Piping Materials 1 In order to avoid supply problems in terms of local regulations and quality, prepare locally-supplied copper pipes. N O T E In case of using copper pipes for piping sections bigger than Ø19.05 mm (3/4 inches), flaring work cannot be per- formed.
  • Page 63 3 Piping work and refrigerant charge C A U T I O N • When inserting a pipe through any hole protect the end with a cap. • Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe Correct Incorrect •...

  • Page 64: Three Principles On Refrigerant Piping Work

    3 Piping work and refrigerant charge 3.2.2  Three principles on refrigerant piping work In case of using refrigerant R410A in the refrigeration cycle, the refrigeration oil should be of a synthetic type one. In order to avoid oxidation, pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work.

  • Page 65: Brazing Work

    3 Piping work and refrigerant charge 3.2.4  Brazing work The most important work in the refrigerant piping installation work is the brazing of the pipes. If it accidentally occurs a leak- age due to a careless brazing process, it will cause clogged capillary pipes or serious compressor failure. In order to guarantee a proper brazing neck between different pipes surfaces, accurate pipe dimensions after the expan- sion process (see the table below): It is important to control the clearance of the pipe fitting portion as shown below.

  • Page 66: Refrigerant Charge

    3 Piping work and refrigerant charge 3.2.5  Refrigerant charge C A U T I O N • Do not charge OXYGEN, ACETYLENE, or other flammable and poisonous gases into the refrigerant because an explosion will occur. It is recommended that oxygen free nitrogen be charged for these types of tests cycle when performing a leakage test or an airtight test.

  • Page 67: Refrigerant Charge Quantity

    3 Piping work and refrigerant charge 3.2.7  Refrigerant charge quantity    Refrigerant charge quantity for IVX series Outdoor units has been charged with refrigerant for ℓ(m) of actual piping length. An additional refrigerant charged is re- quired in systems with actual piping length longer than ℓ(m). 1 Determine an additional refrigerant quantity according to the following procedure, and charge it into the system.
  • Page 68 3 Piping work and refrigerant charge    Refrigerant charge quantity for ES series Outdoor units has been charged with refrigerant for ℓ(m) of actual piping length. An additional refrigerant charged is re- quired in systems with actual piping length longer than ℓ(m). • Determine an additional refrigerant quantity according to the following procedure, and charge it into the system.

  • Page 69: Pump Down Refrigerant

    3 Piping work and refrigerant charge 3.2.8  Pump down refrigerant When the refrigerant should be collected into the outdoor unit due to indoor/outdoor unit relocation, collect the refrigerant as follows: 1 Attach the manifold gauge to the gas stop valve and the liquid stop valve. 2 Turn ON the power source.

  • Page 70: Outdoor Units Ivx Series

    3 Piping work and refrigerant charge 3.3 Outdoor Units IVX Series 3.3.1  Piping connection For a list of factory-supplied accessories, please refer to Accessory code list, see on page 6. 1 The pipes can be connected from any of the following four directions: front, rear, bottom or right side, when facing the outdoor unit.
  • Page 71 3 Piping work and refrigerant charge 1. Service cover. 2. Hook (three places): two fan. 2. Hook (two places): one fan. • For the front and side piping 1. Front piping hole. 2. Side piping hole. SMGB0064 rev.0 - 08/2011...
  • Page 72 3 Piping work and refrigerant charge To use racking or conduit tubes, check the size and remove the stiped parts, following the slit. N O T E Place insulation (field supplied) to protect cables and pipes from being damaged by plate edges. •...
  • Page 73 3 Piping work and refrigerant charge A. Insulation material. B. Field supplied. 7 Operation of stop valve should be performed according to the figure. Description Remarks — Allen wrench Hex 4/5/10 mm Refrigerant Piping Field supplied — Refrigerant Pressure To outdoor unit Seat Surface Fully closed position Only the charging those can be...
  • Page 74 3 Piping work and refrigerant charge • Outdoor unit stop valve 1. Stop valve 2. Flare nut A. Do not apply two spanners at this position. If applied, leakage will occur C A U T I O N At the test run, fully open the spindle. If not fully ope- ned, the devices will be damaged.

  • Page 75: Refrigerant Piping Length

    3 Piping work and refrigerant charge 3.3.2  Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following table. • Piping length specification: Maximum piping length between Outdoor and each Maximum Height difference. Unit indoor unit (L) Outdoor unit is higher than indoor unit...

  • Page 76: Refrigerant Piping Selection

    3 Piping work and refrigerant charge N O T E • L & H are the length & height indicated in the above chart. • For twin, the length is the distance between the outdoor unit and the farthest indoor unit. •...

  • Page 77: Twin And Triple System Installation

    H(V)RNM(2)(E) Installing distributor 1 Install the distributor supplied by HITACHI on request. A tee can not be installed instead of a branch pipe.Example: Twin system 2 Installing the Distributor. Fix the branch pipe horizontally to the pillar, wall or celling. Piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture.

  • Page 78: Drain Discharging Boss

    3 Piping work and refrigerant charge 3 Correct position of twin distributor Correct position of twin branch pipe Wrong position of twin branch pipe A. Up. B. Greater than 0.5 m. C. Main pipe. A. Refrigerant direction D. Refrigerant direction. B.
  • Page 79 3 Piping work and refrigerant charge Bottom base view 1. Drain pipe. 2. Extruded portion. 3. Drain boss. 4. Rubber cap. 5. Drain hole of base. SMGB0064 rev.0 - 08/2011...

  • Page 80: Outdoor Units Es Series

    3 Piping work and refrigerant charge 3.4 Outdoor Units ES Series 3.4.1  Piping connection For a list of factory-supplied accessories, please refer to Accessory code list, see on page 6. 1 The pipes can be connected from any of the following four directions: front, rear, bottom or right side, when facing the outdoor unit.
  • Page 81 3 Piping work and refrigerant charge 1. Service cover. 2. Hook (three places): two fan. 2. Hook (two places): one fan. 1. Rear side piping. 2. Pipe cover. 3. Stop valve. 4. Connecting piping. 5. Liquid. 6. Gas. A. Direction to remove Pipe Cover. •...
  • Page 82 3 Piping work and refrigerant charge • For the downward piping 1. Liquid piping. 2. Wiring. 3. Gas piping. 4. Knock-out hole. 5. Bottom base. N O T E The wiring must not be in contact directly with the pipes. •...
  • Page 83 3 Piping work and refrigerant charge 7 Operation of stop valve should be performed according to the figure below. Closed before shipment Gas valve (RAS-(8/10)HRNSE) only — Allen wrench Hex 5 mm / 4 mm / 10 mm Refrigerant Piping Field supplied —...
  • Page 84 3 Piping work and refrigerant charge C A U T I O N At the test run, fully open the spindle. If not fully opened, the devices will be damaged. Do not attempt to turn service valve rod beyond its stop. Do not loosen the stop ring.
  • Page 85 3 Piping work and refrigerant charge 3.4.2  Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following table. • Piping length specification: Maximum piping length between Outdoor Maximum Height difference. Outdoor unit is Unit and each indoor unit (L) higher than indoor unit/ Indoor unit is higher...
  • Page 86 3 Piping work and refrigerant charge The possible combination between Outdoor Unit and Indoor Unit are the following: Single System Twin System L= A + the longest of B & C Triple System Quad System L= A + (the longest of B + the longest of D & E) & (C + the longest L= A + the longest of B, C &...
  • Page 87 3 Piping work and refrigerant charge 3.4.3  Refrigerant piping selection Select the piping connection sizes according to the following procedures • Between outdoor unit and branch pipe: Select the same pipe connection size as the pipe size of the outdoor unit. • Between branch pipe and indoor unit: Select the same pipe connection size as the pipe size of the indoor unit.
  • Page 88 H(V)RNS(E)(2) Installing distributor 1 Install the distributor supplied by HITACHI on request. A tee can not be installed instead of a branch pipe. Example: Twin system 2 Installing the distributor. Fix the branch pipe horizontally to the pillar, wall or ceiling. The piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture.

  • Page 89: Connecting Flare Adapter (Only For Ras-(2/2.5)Hvrn2)

    3 Piping work and refrigerant charge 3 Correct position of twin distributor Correct position of twin branch pipe Wrong position of twin branch pipe A. Up. B. Greater than 0.5 m. C. Main pipe. A. Refrigerant direction. D. Refrigerant direction. B.
  • Page 90 3 Piping work and refrigerant charge 3.4.6  Drain discharging boss When the base of the outdoor unit is temporarily used as a drain receiver and the drain water in it is discharged, this drain boss is used to connect the drain piping. Model Applicable Model DBS-12L...

  • Page 91: Electrical Wiring

    4 Electrical Wiring E l e c t r i c a l W i r i n g Index 4.1. General check ............................82 4.2. Electrical wiring for the outdoor unit IVX Series ..................83 4.2.1. Electrical wiring connection for the outdoor unit ..................83 4.2.2.

  • Page 92: General Check

    4 Electrical Wiring 4.1 General check D A N G E R • Before installing the electrical wiring or before performing a periodical check, turn OFF the main switch to the indoor unit and the outdoor unit. For safety reasons, be sure that the indoor fan and the outdoor fan have stopped.

  • Page 93: Electrical Wiring For The Outdoor Unit Ivx Series

    Model RAS-(8-12)HRNM 1. Signal wire. 2. Earth. 3. Power source wires.. 4. Cable tie (accessory). 5. Ring core (accessory) 2 turns. RAS-(3-6)HVRNM2E RAS-(4-6)HRNM2E 1. Power supply 1~ 230V. 1. Power supply 3N~ 400V. 2. Control cable (5V). 2. Control cable (5V).

  • Page 94: Setting The Dip Switches For The Outdoor Unit

    4 Electrical Wiring 3 Connect the wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board. 4 Do not run the wires in front of the fixing screw of the service access panel. If you do so, you will not be able to remove the fixing screw.
  • Page 95 4 Electrical Wiring Position of DIP switches (DSW) at the PCB1: 3 HP / (8-12) HP (4-6) HP) N O T E • The mark “■” indicates the position of dips switches. • No mark “■” indicates pin position is not affecting. •...
  • Page 96 4 Electrical Wiring DSW2: Piping length/selection function Setting position Function RAS-3HVRNM2E RAS-(4-6)H(V)RNM2E RAS-(8-12)HRNM Setting before shipment 5 m < Lt Piping length Lt > 30 m 5 m < Lt < 30 m Cancellation of outdoor hot start control. (Not recommended, only available for special testing cases) (RAS-(4-6)H(V)RNM2E: pin 3 is OFF) Cancellation of outdoor air temperature control.
  • Page 97 4 Electrical Wiring DSW5: Transmission setting of end terminal resistance • Before shipment, No. 1 pin of DSW5 is set at ON. • In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of DSW5 at OFF.

  • Page 98: Electrical Wiring For The Outdoor Unit Es Series

    4 Electrical Wiring 4.3 Electrical wiring for the outdoor unit ES Series 4.3.1  Electrical wiring connection for the outdoor unit The correct electrical wiring connection for the outdoor unit is shown below. Insert the power source cables L1 and N (for 230V/50Hz ) and the ground cable into the ring core, coiling them with two turns and fix the cables using the cable tie (accessory).
  • Page 99 4 Electrical Wiring Connect the wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board. 4 Do not run the wires in front of the fixing screw of the service access panel. If you do so, you will not be able to remove the fixing screw.
  • Page 100 4 Electrical Wiring Position of DIP switches (DSW) at the PCB1: RAS-(4-6)HVRNS2E RAS-(8/10)HRNSE N O T E • The mark “■” indicates the position of dips switches. • No mark “■” indicates pin position is not affecting. • The figures show the settings before shipment or after selection. N O T E •...
  • Page 101 4 Electrical Wiring DSW2: Piping length/selection function Function Setting position Setting before shipment 5 m < Lt Piping length Lt > 30 m 5 m < Lt < 30 m Cancellation of outdoor hot start control. (Not recommended, only available for special testing cases ) RAS-(2/6)HVRN(1)(S)(E) Cancellation of outdoor air temperature control.
  • Page 102 4 Electrical Wiring DSW5: Transmission setting of end terminal resistance • Before shipment, No. 1 pin of DSW5 is set at ON. • In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of DSW5 at OFF.

  • Page 103: Electrical Wiring Between Indoor Unit And Outdoor Unit

    4 Electrical Wiring 4.4 Electrical wiring between indoor unit and outdoor unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown in next figure. Double-check that the terminal for power source wiring (terminals “L1” to “L1”, “L2” to “L2”, “L3” to “L3” and “N” to “N” of each terminal board: 3N~ 380-415 V) and the intermediate wires (Operating line: terminals “1”...
  • Page 104 4 Electrical Wiring Power source from the outdoor unit Independent power source of outdoor unit to the indoor unit and indoor unit Outdoor unit Outdoor unit of system no. 0 of system no. 0 Operating line Operating line (shielded twisted pair cable (twisted shielded pair cable or shielded pair cable) or shielded pair cable)

  • Page 105: Wire Sizes

    4 Electrical Wiring 4.5 Wire sizes 4.5.1  Wire sizes for IVX Series Field minimum wire sizes for the power source Power supply cable size Transmitting Cable Size Model Power Source Max. Current (A) EN60 335-1 (2*) EN60 335-1 (2*) All Indoor Units (1*) 0.75 mm 1~ 230V 50Hz RPI-8-10 1.5 mm...
  • Page 106 4 Electrical Wiring Wire size in relationship to the intensity In case that the power cables are connected in series, add each unit maximum current and select according to the next table. Selection according to Selection according to EN60 335-1 LFC (at cable Temp.

  • Page 107: Wire Sizes For Es Series

    4 Electrical Wiring 4.5.2  Wire sizes for ES Series Field minimum wire sizes for the power source Power Source Cable Size Transmitting Cable Size Model Power Source Max. Current (A) EN60 335-1 (2*) EN60 335-1 (2*) All Indoor Units (1*) 0.75 mm RAS-2HVRN2 2.5 mm RAS-2.5HVRN2 18,5 4.0 mm...
  • Page 108 4 Electrical Wiring Wire size in relationship to the intensity In case that the power cables are connected in series, add each unit maximum current and select according to the next table. Selection according to Selection according to EN60 335-1 LFC (at cable Temp.

  • Page 109: H-Link Ii System

    4 Electrical Wiring 4.5.3  H-LINK II System Compatibility The H-LINK II is the wiring connection system between units. The H-LINK II wiring system only needs: • Two transmission wires connecting each indoor and outdoor unit for a total of 64 refrigerant cycles. •...
  • Page 110 4 Electrical Wiring Examples with H-LINK Y H-LINK II systems 1 System with indoor units, outdoor units, remote control and central control type H-LINK II Range number of refrigerant circuits 0-63 Range number of indoor units 0-63 Max. number of indoor units Max.
  • Page 111 4 Electrical Wiring 3 System with indoor units, outdoor units, H-LINK remote controls and H-LINK II with H-LINK II central control. Range number of refrigerant 0-15 0-15 0-63 circuits Range number of indoor units 0-15 0-15 0-63 0-63 Max. number of indoor units Max.
  • Page 112 4 Electrical Wiring The following settings are not available: N O T E • It is not possible to connect diferent indoor units from diferent systems with the same remote control, once the remote control function wiring has been selected not to be used. •...
  • Page 113 4 Electrical Wiring H-LINK II specifications: • Transmission wire: 2-wire • Polarity of transmission wire: non-polar wire • Maximum outdoor units that can be connected: 64 units per H-LINK system. • Maximum indoor units that can be connected: 4 units per cycle and 160 units per H-LINK II system (in case of SET FREE series will be added).
  • Page 114 4 Electrical Wiring System example of H-LINK II There are two typical cases of using H-LINK system: 1 Using H-LINK system with air conditioners only 2 Using H-LINK system with air conditioners with a central control device. The system examples are shown below. a.
  • Page 115 4 Electrical Wiring b. Using an H-LINK II system for air conditioning systems with a central control panel (CSNET WEB or PSC-64S).In case of using a central control panel, you must connect the H-Link II wiring to all the systems. The easiest way of connection to the H-LINK II system is usually to connect the available outdoor units.
  • Page 116 4 Electrical Wiring DIP Switch setting of indoor PCB and Outdoor PCB It is required to set DIP switches of every indoor unit and outdoor unit. SMGB0064 rev.0 - 08/2011...
  • Page 117 4 Electrical Wiring Connection example between H-LINK and H-LINK II units In case of mixed H-LINK and H-LINK II systems, set H-LINK units in the first 16 system positions, as shown in the following figure. There are 42 systems, 16 with FSN1E indoor units type and 26 with FSN3E indoor units type. N O T E •...

  • Page 118: Electrical Wiring Diagrams

    4 Electrical Wiring 4.6 Electrical wiring diagrams 4.6.1  Electrical wiring diagrams for IVX Series RAS-3HVRNM2E Surface Surface DIP-IPM Surface JP12 DCL1 R116 R115 Electrical Box JP11 C112 DANGERHI G HVOLTAGE SEG1 CN5A CN14 CN15 PCN10 PCN13 PCN9 PCN8 R111 PCB1 CP20 DCL2 R117 Y52C DSW6 Back Side of R118 Y20A...
  • Page 119 4 Electrical Wiring RAS-(4-6)HVRNM2E SMGB0064 rev.0 - 08/2011...
  • Page 120 4 Electrical Wiring RAS-(4-6)HRNM2E SMGB0064 rev.0 - 08/2011...
  • Page 121 4 Electrical Wiring RAS-(8-12)HRNM SMGB0064 rev.0 - 08/2011...

  • Page 122: Electrical Wiring Diagrams For Es Series

    4 Electrical Wiring 4.6.2  Electrical wiring diagrams for ES Series RAS-(2/2.5)HVRN2 SMGB0064 rev.0 - 08/2011...
  • Page 123 4 Electrical Wiring RAS-3HVRNS2 SMGB0064 rev.0 - 08/2011...
  • Page 124 4 Electrical Wiring RAS-(4-6)HVRNS2E SMGB0064 rev.0 - 08/2011...
  • Page 125 4 Electrical Wiring RAS-(4-6)HRNS2E SMGB0064 rev.0 - 08/2011...
  • Page 126 4 Electrical Wiring RAS-(8/10)HRNSE SMGB0064 rev.0 - 08/2011...

  • Page 127: Control System

    5 Control System C o n t r o l S y s t e m Index 5.1. Device control system ......................... 118 5.1.1. Device control system for IVX Series .......................118 5.1.2. Device control system for ES Series ....................... 120 5.2.

  • Page 128: Device Control System

    5 Control System 5.1 Device control system 5.1.1  Device control system for IVX Series Purpose Control subject Cooling operation Heating operation Defrost operation The frequency control is deter- The frequency control is deter- mined with the next parameters: mined with the next parameters: • Ratio (I.U. capacity/O.U. ca- •...
  • Page 129 5 Control System The figure below shows the outline of the control system Multiple signals Single signals Wireless remote control switch Thermistor for inlet air Suction gas pressure sensor Thermistor of discharge air Discharge gas pressure sensor Operation signals Thermistor for gas pipe Thermistor for outdoor temperature Thermistor for liquid pipe Discharge gas thermistor...

  • Page 130: Device Control System For Es Series

    5 Control System 5.1.2  Device control system for ES Series Purpose Control subject Cooling operation Heating operation Defrost operation The frequency control is deter- The frequency control is deter- mined with the next parameters: mined with the next parameters: • Temperature difference be- • Temperature difference be- Fixed frequency (stop compressor Control frequency of inverter com- tween air inlet temperature and...
  • Page 131 5 Control System The figure below shows the outline of the control system Symbol Name Symbol Name Motor (for compressor) Current transformer Motor (for indoor fan) High pressure switch MOF1, 2 Motor (for outdoor fan) 4-Way valve Motor (for auto-louver) SVA,B,F Solenoid valve Electronic expansion valve...

  • Page 132: Outdoor Units Pcb

    5 Control System 5.2 Outdoor units PCB 5.2.1  Outdoor units PCB for IVX Series RAS-(3-12)H(V)RNM(2)(E) LED indication This LED indicates the transmission status between LED1 the indoor unit and the RCS This LED indicates the transmission status between LED2 Yellow the indoor unit and the outdoor unit LED3 Green Power source for the PCB...

  • Page 133: Outdoor Units Pcb For Es Series

    5 Control System Switch indication DSW1 Test run (PCB1) DSW2 Piping length and selection function DSW3 Capacity code DSW4/RSW1 Ref. cycle number DSW5 End terminal resistor DSW6 Power source setting N O T E • The mark “■” indicates position of dips switches. Figures show setting before shipment or after selection. •...
  • Page 134 5 Control System Connector indication PCN5 Crankcase heater of compressor (oil) PCN6 Reversing valve relay PCN13 Pressure switch control PCN401 High pressure switch protection THM7 Outdoor air temperature thermistor THM8 PIPE Pipe temperature thermistor THM9 COMP Compressor temperature thermistor THM10 —...
  • Page 135 5 Control System Connector indication PCN1 Fuse PCN2 PCB1 connection for transformer PCN5 Crankcase heater of compressor (oil) PCN6 Output optional function PCN7 Output optional function PCN8 Pressure switch protection PCN9 Compressor contactor PCN13 Pressure switch control THM7 Outdoor air temperature thermistor THM8 Pipe temperature thermistor THM9...

  • Page 136: Protection And Safety Control

    5 Control System 5.3 Protection and safety control 5.3.1  Protection and safety control for IVX Series Compressor protection The following devices and their combinations protect the compressor High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting. This band heater protects against the oil carry-over during the cold starting, as the band heater is Oil heater energized while the compressor is stopped.

  • Page 137: Protection And Safety Control For Es Series

    5 Control System 5.3.2  Protection and safety control for ES Series Compressor protection The following devices and their combinations protect the compressor High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting. This band heater protects against the oil carry-over during the cold starting, as the band heater is Oil heater energized while the compressor is stopped.

  • Page 138: Standard Operation Sequence

    5 Control System 5.4 Standard operation sequence 5.4.1  Standard operation sequence for IVX Series Cooling operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in on the top Power to CH : ON O.U.: ON O.U.: ON of comp. ≥...
  • Page 139 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.

  • Page 140: Dry Operation

    5 Control System Dry operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to on the top of Power to CH : ON O.U.: ON comp. ≥ 60 ºC Power to CH : OFF Only for I.U. with Auto-louver 0 auto-louver Reset...
  • Page 141 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.

  • Page 142: Heating Operation

    5 Control System Heating operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in on the top of Power to CH : ON O.U.: ON O.U.: ON comp. ≥ 60 ºC Power to CH : OFF Only for I.U.
  • Page 143 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER air panel Pressing only for Alternatively or Indoor Unit AUTO-LOUVER switch with Auto-Louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.

  • Page 144: Defrost Operation Control

    5 Control System Defrost operation control Heating operation Power to RVR: OFF Defrosting DEFROST indication start condition Power to MIF: OFF Power to MOF: OFF Defrosting operation Defrosting DEFROST disappears stop condition Inverter Power to MOF : ON Frequency of Power to RVR: ON Comp.

  • Page 145: Standard Operation Sequence For Es Series

    5 Control System 5.4.2  Standard operation sequence for ES Series Cooling operation Continues in the next page. SMGB0064 rev.0 - 08/2011...
  • Page 146 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.
  • Page 147 5 Control System Dry operation Continues in the next page. SMGB0064 rev.0 - 08/2011...
  • Page 148 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.
  • Page 149 5 Control System Heating operation Continues in the next page. SMGB0064 rev.0 - 08/2011...
  • Page 150 5 Control System SMGB0064 rev.0 - 08/2011...
  • Page 151 5 Control System Defrost operation control Heating operation Power to RVR: OFF Defrosting DEFROST indication start condition Power to MIF: OFF Power to MOF: OFF Defrosting operation Defrosting DEFROST disappears stop condition Inverter Power to MOF : ON Frequency of Power to RVR: ON Comp.

  • Page 152: Standard Control Functions

    5 Control System 5.5 Standard control functions 5.5.1  Standard control functions for IVX Series Freezing protection during cooling process or dry operation SMGB0064 rev.0 - 08/2011...
  • Page 153 5 Control System Prevention control for excessively high discharge gas temperature Heating operation Lower than 65 ºC Outlet air temp. of I.U. Higher than 65 ºC CMC : OFF Compressor stop Is it continuous for more than 3 min? Higher than 60 ºC Discharge air temp.
  • Page 154 5 Control System Outdoor unit electrical expansion valve control 1 After supplying power source, the electronic expansion valve is completely opened. 2 When the compressor is stopped, the electronic expansion valve is completely closed to adjust its opening. 3 At starting operation (compressor is operated), opening of the electronic expansion valve is set at a specified opening. a.
  • Page 155 5 Control System Activation for protection device control SMGB0064 rev.0 - 08/2011...
  • Page 156 5 Control System Outdoor fan control during cooling operation Operation 10 sec. *1) Fan step at start Pressure switch for control: ON Step up Is fan operated more than 3 min?. Pipe surface temp. of outdoor unit heat exchanger < 30 ºC. Pipe surface temp.
  • Page 157 5 Control System N O T E • This sequence is for the standard operation. *1) Fan step at start Outdoor temp. (Tao) Air flow ratio Tao ≤ 2 °C 2 °C < Tao ≤ 12 °C 12 °C < Tao ≤ 22 °C 22 °C <...
  • Page 158 5 Control System Outdoor fan control during heating operation Fan step: 30% area Operation Inlet air temp. of indoor unit (ºC) 30% area (1*) ≥ 100% Outdoor temperature (ºC) Pressure switch for control: TrL ≥ TrL1+2 OFF ON TrL: Indoor unit liquid pipe temp. TrL1: Indoor unit liquid pipe Is fan operated temp.
  • Page 159 5 Control System Fan steps 9 10 11 12 13 14 15 MOF2 ON speed 1 ON speed 2 Mof 1 MOF1 ON regulated Mof 2 SMGB0064 rev.0 - 08/2011...
  • Page 160 5 Control System Preheating control of compressor Operation > 55ºC Temp. on the top of comp. ≤ 55ºC CH : ON < 60ºC Temp. on the top of comp. ≥ 60ºC CH : OFF Prevention control for high pressure increase This function is performed to prevent the abnormal condition (Alarm: 02) when the outdoor air flow is decreased by a sea- sonal wind against air outlet.

  • Page 161: Standard Control Functions For Es Series

    5 Control System 5.5.2  Standard control functions for ES Series Freezing protection during cooling process or dry operation SMGB0064 rev.0 - 08/2011...
  • Page 162 5 Control System Prevention control for excessively high discharge gas temperature Heating operation Lower than 65 ºC Outlet air temp. of I.U. Higher than 65 ºC CMC : OFF Compressor stop Is it continuous for more than 3 min? Higher than 60 ºC Discharge air temp.
  • Page 163 5 Control System Outdoor unit electrical expansion valve control 1 After supplying power source, the electronic expansion valve is completely opened. 2 When the compressor is stopped, the electronic expansion valve is completely closed to adjust its opening. 3 At starting operation (compressor is operated), opening of the electronic expansion valve is set at a specified opening. a.
  • Page 164 5 Control System Activation for protection device control SMGB0064 rev.0 - 08/2011...
  • Page 165 5 Control System Outdoor fan control during cooling operation Operation 10 sec. *1) Fan step at start Pressure switch for control: ON Step up Is fan operated more than 3 min?. Pipe surface temp. of outdoor unit heat exchanger < 30 ºC. Pipe surface temp.
  • Page 166 5 Control System N O T E • This sequence is for the standard operation. *1) Fan step at start Outdoor temp. (Tao) Air flow ratio Tao ≤ 2 °C 2 °C < Tao ≤ 12 °C 12 °C < Tao ≤ 22 °C 22 °C <...
  • Page 167 5 Control System Outdoor fan control during heating operation Fan step: 30% area Operation Inlet air temp. of indoor unit (ºC) 30% area (1*) ≥ 100% Outdoor temperature (ºC) Pressure switch for control: TrL ≥ TrL1+2 OFF ON TrL: Indoor unit liquid pipe temp. TrL1: Indoor unit liquid pipe Is fan operated temp.
  • Page 168 5 Control System Preheating control of compressor SMGB0064 rev.0 - 08/2011...
  • Page 169 5 Control System Control for auto cool/heat operation Prevention control for high pressure increase This function is performed to prevent the abnormal condition (Alarm: 02) when the outdoor air flow is decreased by a sea- sonal wind against air outlet. When the CMC is ON during cooling operation, PSC is ON and Tc is higher than Tc1+4°C, forced thermo-off operation will be performed.

  • Page 171: Optional Functions

    6 Optional functions O p t i o n a l f u n c t i o n s Index 6.1. Outdoor units IVX and ES series......................162 6.1.1. Available ports ............................162 6.1.2. Configuration ............................164 6.1.3. Description of optional input signals ......................165 6.1.4.

  • Page 172: Outdoor Units Ivx And Es Series

    6 Optional functions 6.1 Outdoor units IVX and ES series The system has eight input and five output signals that are programmed in the PCB of the outdoor unit using connectors CN1 and CN2 for the input signals and CN7 for the output signal. Connectors CN1 and CN2 have two and one ports respectively to configure three input options out of the eight options the system has.
  • Page 173 6 Optional functions Output connections Indication Connections Specification of the components for a correct installation Component Manufacturer or specifications Remarks OMRON mini power relay model: MY1F or Voltage between relay terminals 12 Vdc - 75 Auxiliary relay (X3) equivalent Voltage between terminals of the 230V - 5 (SS1) (x1), (x2) contact example Manual type mA contactor...

  • Page 174: Configuration

    6 Optional functions 6.1.2  Configuration Available optional signals The units have the following signals that are described in the following table. These signals are set up through the PCB of the outdoor unit. • Input signals Ind. Input signal Application Port N°...

  • Page 175: Description Of Optional Input Signals

    6 Optional functions • Selection of the input signal If the below setting change is required on-site, perform the follow- ing instructions: 1 While the outdoor unit is ON, set the following DIP switches Input setting 1 Factory setting CN1, 1-2 on the printed circuit board of the outdoor unit as follows: set pin 6 of DSW2 to ON.

  • Page 176: Description Of Optional Output Signals

    6 Optional functions code “d1” “20” will be displayed if an attempt is made to change the operation mode of any of the indoor units with the remote control. Example of wiring diagram of fixing the operation mode. Outdoor unit PCB Power supply •...
  • Page 177 6 Optional functions Connect the cabling and use the materials as shown in Available ports, see on page 162 Note that the contact of auxiliary relay X3 is closed when an operation signal is issued. Compressor on signal (03) This optional signal is used to pick up the signal when the compressor is ON. It can be used to check how the compressor is running at all times.
  • Page 178 6 Optional functions • Selecting the optional function Night shift Not available Fixing of demand Not available function PSW1 SET* PSW2 PSW3 PSW1 Available SET* PSW2 PSW3 Available Defrost condition Not available Wave function Not available setting PSW1 SET* PSW2 PSW3 PSW1 Available...
  • Page 179 6 Optional functions • Fixing of demand function This function regulates the running current of the outdoor unit. If the demanded current is above the set current, the indoor unit capacity is reduced. The running current can be regulated both from internal signal. The capacity regulation is 50%, 75%, 100%.This function can be activated when the demand is selected at one of input terminal indications i1i2, and i3In case that multiple demand functions are set the input terminal indications, i1i2, and i3The de- mand running current is selected with 5, 6, 7.
  • Page 180 6 Optional functions • Outdoor fan A. Maximum rotation (rotating speed) B. Outdoor temp (ºC) N O T E • The maximum rotation (rotating speed) is always 100% for the standard unit. (No limitation of the outdoor temperature). • Change of defrost operation conditions This function allows to change the operation conditions in defrosting mode.
  • Page 181 6 Optional functions COOL or DRY mode at indoor unit. The minimum temperature is -5 ºC. To activate this option the jumper JP4 of the outdoor unit PCB1 must be cut. Alternative defrost mode When one outdoor unit is connected with one H-LINK system with other outdoor units, is under defrosting, the other outdoor units defrosting is cancelled.

  • Page 183: Test Run

    7 Test Run Te s t R u n Index 7.1. Checking procedure before the test run ....................174 7.2. Test run procedure using the remote control switch ................176 7.3. Test run procedure using the wireless remote control switch .............. 178 7.4.

  • Page 184: Checking Procedure Before The Test Run

    7 Test Run 7.1 Checking procedure before the test run When you have finished the installation, perform the test run according to the following procedure. After performing the test run, hand over the system to the customer. Perform the test run of the indoor units one by one in order. Make sure that the electrical wiring and the refrigerant piping are correctly connected.
  • Page 185 7 Test Run • Check to ensure that the main source has been ON for more than 12 hours to warm the compressor oil by the oil heater. • Check to ensure the operating temperature: Cooling operation: Š Indoor DB 21.5 ºC and above, Š...

  • Page 186: Test Run Procedure Using The Remote Control Switch

    7 Test Run 7.2 Test run procedure using the remote control switch 1 Turn ON the power source to the indoor and outdoor units. 2 Select the TEST RUN mode by using the remote control switch: press MODE switch and the OK switch simultaneously for more than 3 seconds.
  • Page 187 7 Test Run Inspection points after swit- Indication on the remote control Unit status Fault ching off the power supply The connection order of each terminal board. The fuse on the PCB may have blown out due to an incorrect wiring. (The fue can be recovered The operation LED flickers (1 only once by DSW on the...

  • Page 188: Test Run Procedure Using The Wireless Remote Control Switch

    7 Test Run 7.3 Test run procedure using the wireless remote control switch N O T E If the wired remote control switch is used or if multiple units (SET-FREE, DC INVERTER and UTOPIA series) are operating simultaneously, you cannot perform the test run by means of the remote control swirch. If that is the case, perform the test run by means of the wired remote control switch.
  • Page 189 7 Test Run In the TEST RUN mode, the red RUN LED of the receiver is turned ON and the green TIMER LED flickers (0.5 seconds ON ↔ 0.5 seconds OFF) (*2). Then, the timer switches off for two hours. N O T E If the yellow LED does not turn ON, the commands from the remote control switch may not have reached the re- ceiver.

  • Page 190: Test Run Procedure From The Outdoor Unit Side

    7 Test Run 7.4 Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below. You can set this DIP switch while the power source is ON. Setting of dip switch DSW1 Cooling: Pin 1 ON Heating: Pin 1, 2 ON...

  • Page 191: Check List

    7 Test Run 7.5 Check list 7.5.1  Check list for IVX Series Check list on test run MODEL: SERIAL No. COMPRESSOR MFG No. NAME AND ADDRESS OF CUSTOMER: DATE: 1 Is the rotating direction of the indoor coil fan correct? __________ 2 Is the rotating direction of the outdoor coil fan correct? __________ 3 Is there any abnormal compressor sound? __________ 4 Has the unit been operating for at least twenty (20) minutes? __________ 5 Check the room temperature:...
  • Page 192 7 Test Run 21 Does the drain water flow smoothly from the drain pipe? __________ Normal operation pressure You can check the excess or the deficiency of the refrigerant in comparision with the following charts and actual pressure measurement. The following checking procedure is useful during test run and maintenance work. RAS-(3-6)H(V)RNM2E Cooling operation Heating operation...
  • Page 193 7 Test Run N O T E • Nominal Pd and Ps Indoor unit combination: Nominal value (MPa) 2.76 2.74 2.76 2.77 2.77 Cooling 0.89 0.84 0.84 0.85 0.85 3 HP 2.56 2.54 2.56 2.57 2.57 Heating 0.74 0.70 0.70 0.70 0.70 2.58...
  • Page 194 7 Test Run Model RAS-8HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Oudoor unit temp.
  • Page 195 7 Test Run Model RAS-10HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Indoor unit temp.
  • Page 196 7 Test Run Model RAS-12HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Oudoor unit temp.

  • Page 197: Check List On Compressor

    7 Test Run Check list on compressor CLIENT: MODEL: DATE: Serial N°: Production date: Checker: N° Check item Check method Result Remarks (1) Is wire of thermistor correctly connected by viewing? Is THM9 correctly connected? (2) Check to ensure the 7-segment indication of THM9: Discharge gas thermistor Td when comp.
  • Page 198 7 Test Run Additional information for “Check list on compressor” Check item Additional information (mechanism of compressor failure) The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small 1 &...

  • Page 199: Check List For Es Series

    7 Test Run 7.5.2  Check list for ES Series Check list on test run MODEL: SERIAL No. COMPRESSOR MFG No.: NAME AND ADDRESS OF CUSTOMER: DATE: 1 Is the rotating direction of the indoor coil fan correct? __________ 2 Is the rotating direction of the outdoor coil fan correct? __________ 3 Is there any abnormal compressor sound? __________ 4 Has the unit been running for at least twenty (20) minutes? __________ 5 Check the temperature of the room:...
  • Page 200 7 Test Run Normal operation pressure You can check the excess or the deficiency of the refrigerant in comparision with the following charts and actual pressure measurement. The following checking procedure is useful during test run and maintenance work. MODEL RAS-(2-6)H(V)RN(S)2(E) Cooling operation Heating operation Discharge pressure Pd (MPa)
  • Page 201 7 Test Run MODEL RAS-(8/10)HRNSE Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Outdoor unit temp. (DB ºC) Indoor unit temp. (DB ºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Outdoor unit temp.
  • Page 202 7 Test Run Nominal value (MPa) RPF(I) 2.73 2.88 2.85 2.89 2.84 2.78 Cooling 0.88 0.78 0.82 0.80 0.81 0.80 2 HP 2.37 2.83 2.51 2.65 2.68 2.54 Heating 0.66 0.67 0.67 0.67 0.67 0.67 2.79 2.91 2.90 2.93 2.95 2.88 Cooling 0.87...
  • Page 203 7 Test Run Check list on compressor CLIENT: MODEL: DATE: Serial No.: Production date: Checker: N° Check item Check method Result Remarks (1) Is wire of thermistor correctly connected by viewing? Is THM9 correctly connected? (2) Check to ensure the 7-segment indication of THM9: Discharge gas thermistor Td when comp.
  • Page 204 7 Test Run Additional information for “Check list on compressor” Check item Additional information (mechanism of compressor failure) The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small 1 &...

  • Page 205: Troubleshooting

    8 Troubleshooting T r o u b l e s h o o t i n g Index 8.1. Initial troubleshooting for IVX an ES Series ..................196 8.1.1. Checking by means of the 7-segment display ..................196 8.1.2. Failure of the power supply to the indoor unit and the remote control switch .......... 197 8.1.3.

  • Page 206: Initial Troubleshooting For Ivx An Es Series

    8 Troubleshooting 8.1 Initial troubleshooting for IVX an ES Series 8.1.1  Checking by means of the 7-segment display Simple checking procedure by means of the 7-segment display 1 Turn on all the indoor units which are connected to the outdoor unit. 2 Turn on the outdoor unit 3 Auto-addressing starts.

  • Page 207: Failure Of The Power Supply To The Indoor Unit And The Remote Control Switch

    8 Troubleshooting 8.1.2  Failure of the power supply to the indoor unit and the remote control switch • The LED and the LCD are not indicated. • Not operated If the fuses are blown out or a breaker is activated, investigate the cause of the overcurrent and take the necessary action. Action Phenomenon Cause Check item (Turn OFF the main switch)

  • Page 208: Abnormal Transmission Between The Remote Control Switch And The Indoor Unit

    8 Troubleshooting 8.1.3  Abnormal transmission between the remote control switch and the indoor unit RUN LED on the remote control switch: • Flickering every 2 seconds. Action Phenomenon Cause Check item (Turn OFF the main switch) Check the cable and the connec- Repair the cable or connect the Disconnection or insufficient contacting of the remote control cable tions cable Check the remote control switch...
  • Page 209 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Failure of thermistor Failure of air inlet Disconnection of Replace or correctly connect thermistor thermistor Check it by self-checking *2) the wires if Abnormal Operation exists Abnormal operation of the remote control switch cord Check PCB by means of the Failure of the indoor unit PCB...
  • Page 210 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor cool load is greater than the cooling capac- Calculate the cool load Use a bigger unit Gas leakage or short- Correctly charge the refrigerant Measure superheat age of refrigerant after repairing the gas leakage Excessively small Measure and check the field-...
  • Page 211 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Clogging of the outdoor unit Remove the clogging heat exchanger? Obstacles at the inlet or the Insufficient air flow to outlet of the outdoor unit heat Remove the obstacles the outdoor unit heat exchanger exchanger...
  • Page 212 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor heat load is greater than the heating ca- Replace the unit with a bigger Calculate the heat load pacity unit Correctly charge the refrigerant Gas leakage or insuffi- Measure superheat after the gas leakage check and cient refrigerant charge...
  • Page 213 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Foreign particles inside of the fan casing Visually inspect it Remove the foreign particles Adjust the position of the fan Indoor unit fan runner is hitting the casing Visually inspect it runner Adjust the position of the...

  • Page 214: Troubleshooting Procedure For Ivx An Es Series

    -A-, the alarm code -B- and the model code -C-. If there are various indoor units connected, the above mentioned information is shown for each one of them -D-.Write down the indications and contact your HITACHI service supplier. •...
  • Page 215 8 Troubleshooting Alarm codes for IVX and ES Series Code Category Type of Abnormality Main cause Failure of fan motor, drain discharge, PCB, relay, float switch Indoor unit Activation of protection device activated. Activation of PSH, locked motor, abnormal operation in the Outdoor unit Activation of protection device power supply phase.
  • Page 216 8 Troubleshooting Code Category Type of Abnormality Main cause IU No. setting Incorrect unit No. setting Over 64 indoor units, setting by no. or indoor unit address. Room temperature thermistor Sensor on KPI Failure of thermistor, sensor, connection. Unit Outdoor temperature thermistor SMGB0064 rev.0 - 08/2011...
  • Page 217 8 Troubleshooting    Troubleshooting by alarm code  Alarm code Activation of the safety device in the indoor unit • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. •...
  • Page 218 8 Troubleshooting Alarm code Activation of the safety device in the outdoor unit for IVX series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 219 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Check the heat exchanger Remove the dust or the for dust or for clogging clogging Check the air filter for dust Remove the dust Check for any obstacles at Insufficient Air Flow to the Heat Exchanger (Outdoor Heat the inlet or the outlet of the Remove the obstacles...
  • Page 220 8 Troubleshooting Alarm code Activation of the safety device in the outdoor unit for ES series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 221 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Check the heat exchanger Remove the dust or the for dust or for clogging clogging Check the air filter for dust Remove the dust Check for any obstacles at Insufficient Air Flow to the Heat Exchanger (Outdoor Heat the inlet or the outlet of the Remove the obstacles...
  • Page 222 8 Troubleshooting Alarm code Abnormal transmission between the indoor units and the outdoor unit for IVX series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. •...
  • Page 223 8 Troubleshooting Is DSW5-1P (terminal Set it correctly resistance on PCB1) ON? Is the voltage between the terminal Check the fuses of the Is LED1 (red) on "1" and "3" of PCB1 220V or 240V? *2) outdoor unit power supply PCB1 ON? Remove CN8 of Is connector...
  • Page 224 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Measure the voltage using the Power failure or no power supply Supply the power tester Check the insulation material for Remove the short circuit and Short circuit between wires breaks replace the fuse Remove the short circuit to...
  • Page 225 8 Troubleshooting Alarm code Abnormal transmission between the indoor units and the outdoor unit for ES series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. •...
  • Page 226 8 Troubleshooting SMGB0064 rev.0 - 08/2011...
  • Page 227 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Measure the voltage by means of Power failure or power is not ON Supply the power the tester Check the insulation material for Remove the short-circuit and Short-circuit between the wires breaks replace the fuse Remove short-circuit to ground...
  • Page 228 8 Troubleshooting Alarm code Abnormal transmission between Inverter PCB and Outdoor PCB1 for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 229 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB, inverter Check the continuity of wires. Replacing wires, repairing, PCB and FANM Disconnected wires, insufficient Check for looseness of the tightening screws and incorrect contacting or incorrect connection connection screws.
  • Page 230 8 Troubleshooting Alarm code Abnormal transmission between Inverter PCB2 and Outdoor PCB1 for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 231 8 Troubleshooting RAS-(4–6)H(V)RNS2E N O T E Regarding the checking of DC fan motor, refer to section Procedure of checking other main parts for ES Series, see on page 312 SMGB0064 rev.0 - 08/2011...
  • Page 232 8 Troubleshooting RAS-(8/10)HRNSE RAS-(4–10)H(V)RNS(2)E Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB, inverter Check the continuity of wires. Replacing wires, repairing, PCB2 Disconnected wires, insufficient Check for looseness of the tightening screws and incorrect contacting or incorrect connection connection screws.
  • Page 233 8 Troubleshooting Alarm code Code abnormal operation of picking up phase signal for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 234 This alarm code is displayed when the voltage between terminal “P” and “N” of IPM is insufficient and the alarm has three occurrences in 30 minutes. If the number of occurrences is smaller than two, the retry operation is performed. The alarm code “06.” Means fan controller abnormal operation. RAS-(3-6)HVRNM2E Restart the operation Is the power supply voltage Check the wiring and the 230V ±10%...
  • Page 235 8 Troubleshooting RAS-(4-6)HRNM2E Restart the operation Is the power supply Check the wiring and the voltage 400V ±10%? cable capacity Is the voltage over 340V during the operation? Does the voltage fall during the operation because of the operation of other apparatus? Frequency can increase higher than 60 Hz How is the...
  • Page 236 8 Troubleshooting RAS-(8-12)HRNM Restart the operation Is the power supply voltage Check the wiring and the 380V ±10% or 415V ±10% cable capacity Is the voltage over 323V during operation? Does the voltage fall during the operation because of the operation of other apparatus? Frequency can increase higher than 60 Hz...
  • Page 237 8 Troubleshooting Alarm code Excessively low voltage or excessively high voltage for the inverter for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. •...
  • Page 238 8 Troubleshooting RAS-(4-6)H(V)RNS2E 340V N O T E • *1): Checking procedures of IPM is indicated in item Procedure of checking other main parts for ES Series, see on page 312 SMGB0064 rev.0 - 08/2011...
  • Page 239 8 Troubleshooting RAS-(8/10)HRNSE N O T E • *1): If capacitor has high voltage, perform the high voltage discharge work refer to the item Procedure of checking other main parts for ES Series, see on page 312. • *2): Regarding replacing or checking method for the inverter PCB, refer to the item Procedure of checking other main parts for ES Series, see on page 312.
  • Page 240 8 Troubleshooting Alarm code Decrease of Discharge Gas Superheat for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 241 8 Troubleshooting Alarm code Decrease of Discharge Gas Superheat for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 242 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Check ref. cycle and the Ref. cycle is different from the electrical system Repair wiring electrical system Overcharged Refrigerant Measure pressure Correctly charge refrigerant Replace expansion valve if Faulty Expansion Valve Check expansion valve *1) faulty...
  • Page 243 8 Troubleshooting Alarm code Excessively High Discharge Gas Temperature at the Top of Compressor for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 244 8 Troubleshooting Alarm code Excessively High Discharge Gas Temperature at the Top of Compressor for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 245 8 Troubleshooting Alarm code Abnormal operation of thermistor for the indoor unit air inlet temperature (air inlet thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 246 8 Troubleshooting Alarm code Abnormal operation of the thermistor for the indoor discharge air temperature (air outlet thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 247 8 Troubleshooting Abnormal operation of the thermistor for the indoor unit heat exchanger liquid pipe temperature Alarm code (freeze protection thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 248 8 Troubleshooting Abnormal operation of the thermistor for the indoor unit heat exchanger gas pipe temperature (gas Alarm code piping thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 249 8 Troubleshooting Alarm code Abnormal operation of thermistor for fresh outdoor air (Econofresh) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 250 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (except RCI, RCIM and RPK) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 251 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (RCI, RCIM) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. •...
  • Page 252 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (RPK) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
  • Page 253 8 Troubleshooting Alarm code Abnormality of Thermistor for Discharge Gas Temperature (Compressor Thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 254 8 Troubleshooting Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient thermistor) for Alarm code IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 255 8 Troubleshooting Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient thermistor) for Alarm code ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 256 8 Troubleshooting Abnormal operation of the thermistor for the evaporating temperature during the heating process Alarm code (outdoor unit) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 257 8 Troubleshooting Alarm code Incorrect Capacity Setting or Combined Capacity between Indoor Units and Outdoor Unit • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 258 8 Troubleshooting Alarm code Incorrect Indoor number setting • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, alarm code and unit model code appear alternately on the Set Temperature display of the remote control switch.
  • Page 259 8 Troubleshooting Alarm code Abnormality of Protective Circuit for Protection (Outdoor Unit) for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 260 8 Troubleshooting Alarm code Abnormality of Protective Circuit for Protection (Outdoor Unit) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 261 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF Main Switch) Faulty DIP-IPM Check DIP-IPM by seft-checking Replace DIP-IPM N O T E • For PCB self diagnosis, see Page 420 of “Technical Catalogue/Service Manual”. • This alarm (Alarm Code: 38) may appear when the operation is started, if the Faston terminal of the high pres- sure switch (63H1) is improperly connected or damaged (open-circuit fault).
  • Page 262 8 Troubleshooting Alarm code Cooling Overload (High pressure switch will be activated) for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 263 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF main switch) Clogging of heat exchanger? Remover clogging Check for dust on air filter Remove dust Check the service space Secure service space Insufficient air flow to heat exchanger of outdoor unit Check for speed: Outdoor fan: cooling Replace fan motor if faulty...
  • Page 264 8 Troubleshooting Alarm code Cooling Overload (High pressure switch will be activated) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 265 8 Troubleshooting RAS-(4-6)H(V)RNS2E SMGB0064 rev.0 - 08/2011...
  • Page 266 8 Troubleshooting RAS-(8/10)HRNSE SMGB0064 rev.0 - 08/2011...
  • Page 267 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF main switch) Clogging of Heat Exchanger? Remover clogging Check for dust on air filter Remove dust Check the service space Secure service space Insufficient Air Flow to Heat Exchanger of Outdoor Unit Check for speed: Outdoor Fan: Cooling Replace fan motor if faulty...
  • Page 268 8 Troubleshooting Alarm code Heating Overload (High pressure switch will be activated) for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 269 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF main switch) Clogging of Heat exchanger Check for dust on air filter Remove it Check for any obstacle at inlet or outlet of heat exchanger Insufficient air flow to heat exchanger of indoor unit Check the service space Secure service space Check for fan speed.
  • Page 270 8 Troubleshooting Alarm code Heating Overload (High pressure switch will be activated) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 271 8 Troubleshooting RAS-(8/10)HRNSE SMGB0064 rev.0 - 08/2011...
  • Page 272 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF Main Switch) Clogging of Heat Exchanger Check for dust on air filter Remove it Check for any obstacle at inlet or Activation of High Pressure Switch outlet of heat exchanger Insufficient Air Flow to Heat due to Excessively High Discharge Exchanger of Indoor Unit Check the service space...
  • Page 273 8 Troubleshooting Activation to Protect System from Excessively Low Suction Pressure (Protection from Vacuum Opera- Alarm code tion) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 274 8 Troubleshooting Alarm code Overcurrent protection activation for IVX series Turn OFF power and disconnect U, V, W from Is there any cause of compressor terminals. Check the Restart operation. instantaneous voltage Turn ON #1 of DSW1 on PCB2 compressor. Does it trip soon? decrease? (IPM or dipIPM) and restart.
  • Page 275 8 Troubleshooting Alarm code Activation Protection Against Instantaneous Overcurrent of Inverter for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 276 8 Troubleshooting Alarm code Abnormal operation of the current sensor • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 277 8 Troubleshooting Protection activation of IPM or DipIPM and PCB2 ( RAS-(3-6)HVRNM2E and RAS-(8-12)HRNM) for Alarm code IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 278 8 Troubleshooting Alarm code Activation for protecting the ISPM (RAS-(3-6)HRNM2E for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 279 8 Troubleshooting Alarm code Transistor module protection activation for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 280 8 Troubleshooting Alarm code Protection activation of IPM or PCB2 for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
  • Page 281 8 Troubleshooting Alarm code Increase in the inverter fin temperature IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 282 8 Troubleshooting Alarm code Increase in the inverter fin temperature for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 283 8 Troubleshooting Alarm code IPM or PCB2 abnormality for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 284 8 Troubleshooting Alarm code Abnormality of Inverter Module for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 285 8 Troubleshooting Alarm Code Inverter Failure for ES series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is displayed when the following phenomenon occurs 3 times in 30 minutes including 3: (Retry operation is performed up to the occurrence of 2 times.)
  • Page 286 8 Troubleshooting • *3): Turn ON the No.1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor. After troubleshooting, turn OFF the No.1 switch of the dip switch DSW1 on PCB2. • •...
  • Page 287 8 Troubleshooting Alarm code Abnormality of fan motor protection (DC fan motor) for IVX series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 288 8 Troubleshooting Alarm code Abnormality of fan motor protection (DC fan motor) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 289 8 Troubleshooting Alarm code Inverter Fin Temp. Thermistor Abnormality (Only for RAS-(8/10)HRNSE) for ES series • “RUN” light flashes and “ALARM” is indicated on the remote control switch. • The unit No, alarm code and the unit code is alternately indicated on the set temperature section, and the unit No. and alarm code are indicated on the display of the outdoor unit PCB1.
  • Page 290 8 Troubleshooting Alarm code Abnormal operation of Thermistor for the KPI (room Temperature Thermistor) for IVX series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 291 8 Troubleshooting Alarm code Abnormal operation of thermistor for the KPI (outdoor temperature thermistor) for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 292 8 Troubleshooting Alarm code Compressor protection for IVX Series • This alarm code is displayed when one of the following alarms occurs three times within six hours. If the outdoor unit operates continuously without removing the cause of the alarm, the compressor may be seriously damaged Alarm code Content of abnormality Tripping of protection device in outdoor unit...

  • Page 293: Troubleshooting In Check Mode

    8 Troubleshooting 8.2.2  Troubleshooting in check mode Use the “OK” switch of the remote control in the following cases: 1 When the RUN LED is flickering. 2 To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering. 3 To check during the normal operation or during the stoppage.
  • Page 294 8 Troubleshooting SMGB0064 rev.0 - 08/2011...
  • Page 295 8 Troubleshooting Although the wireless controller is used for the wall type indoor unit with the built-in receiver part, you can check the alarm code by connecting the PC-ART. N O T E • The unit does not operate by pressing the operation switch.
  • Page 296 8 Troubleshooting Indication of micro-computer input/output Part name Relay Micro-computer input/ YH2: Relay for drain pump (MD) and/or dew heater (EHW). output in indoor unit 52H: Relay for electric heater (CEH) Y21: Relay for 4-way valve Y52C: Relay for compressor Micro-computer input/ Y20A: Relay for Selonoid Valve (SVA2)
  • Page 297 8 Troubleshooting Operation OFF, Power OFF Thermo - OFF (Note 1) Alarm (Note 2) Freeze protection, overheating protection Instantaneous power failure at outdoor unit, reset (Note 3) Instantaneous power failure at indoor unit, reset (Note 4) Stoppage of Cooling operation due to Low Outdoor Air Temperature (<=-7 ºC), Stoppage of Heating Operation due to high Outdoor Air Temperature, and high indoor air temperature, stoppage of heating operation due to low Outdoor Air Temperature (<=-20 ºC) Demand, enforced stoppage Retry due to high pressure increase...
  • Page 298 8 Troubleshooting SMGB0064 rev.0 - 08/2011...
  • Page 299 8 Troubleshooting Contents for Check mode 2 When more than three indoor units are connected to remote control switch, the latest data of only the first three indoor units are connected serially are displayed. If you press the part “▲” of the TEMP switch, the next display appears. If you press the past “▼” of the TEMP switch, the previous display appears.

  • Page 300: Troubleshooting By Means Of The 7-Segment Display

    8 Troubleshooting 8.2.3  Troubleshooting by means of the 7-segment display Simple checking by 7-segment display • During auto-addressing, the following items can be checked using the outdoor unit’s on-board 7-segment LED display: 1. Disconnection of power supply to the indoor unit. 2. Reverse connection of the operating line between the outdoor and indoor units. 3.
  • Page 301 8 Troubleshooting Item Indication data Item Check Inidic. Indic Contents Total capacity of indoor unit 00~96 (00~80 in case of ≤6 HP) connected Input / output state of outdoor Indicates only for the segments corresponding to the equipment in the figure. (See 8 ...
  • Page 302 8 Troubleshooting Cause of inverter stoppage (11) Indication Contents IPM, ISPM, DIP-IPM error Instantaneous Over Current Inverter Fin Thermistor Protection Activation Electronic Thermal Activation Inverter Voltage Decrease Over Voltage Abnormal Transmission Abnormal Current Detection Instantaneous Power Failure Detection Reset of Micro-Computer for Inverter Earth Fault Detection from Compressor Open Phase Detection Inverter Malfunction...
  • Page 303 8 Troubleshooting Cause of Indoor Unit stoppage (20) Indication Contents Operation OFF, Power OFF Thermo-OFF Alarm Freeze Protection Overheating Protection Instantaneous Power Failure at Outdoor Unit Instantaneous Power Failure at Indoor Unit Stoppage of Cooling Operation due to Low Outdoor Air Temperature Stoppage of Heating Operation due to High Outdoor Air Temperature Demand thermo OFF Retry for Pd Increase Prevention...

  • Page 304: Troubleshooting By Means Of The Flashing Alarm Leds For Rpk-Fsn2M

    8 Troubleshooting 8.2.4  Troubleshooting by means of the flashing alarm LEDs for RPK-FSN2M The red LED located on the panel indicates the following alarms: Code Cause Indication Alarm 02 Unit protection This alarm is activated when the blinks sequence is two times ON / two seconds OFF Alarm 03 Transmission error This alarm is activated when the blinks sequence is three times ON / two seconds OFF Inverter outdoor unit...

  • Page 305: Cause Of Inverter Stop

    8 Troubleshooting 8.2.5  Cause of inverter stoppage Remark Cause of Stoppage Code Cause for Corresponding Indication Alarm Code Unit during Retry Automatic Stoppage of Transistor Module (DIP-IPM Error)  1 (Overcurrent, Undercurrent, Temperature increase) Instantaneous Over Current  2 Abnormal Inverter Fin Thermistor  3 Electronic Thermal Activation (Inverter overcurrent)  4 Inverter Voltage Decrease (Undervoltage)  5...
  • Page 306 8 Troubleshooting Code Protection Control Inverter-Trip Retry Control Voltage Drop (or Overvoltage) Retry Control Protection Control for Power Source Voltage Unbalance Detection Current Demand Control Suction Pressure Decrease Prevention Control • Retry indication continues for 30 minutes unless a protection control is indicated. •...
  • Page 307 8 Troubleshooting The activating conditions of protection control are shown in the table below Code Protection Control Activating Condition Remarks Compression Ratio ε < 2.2 Low-Pressure Ratio Control at Cooling ε = (Pd+0.1)/(Ps+0.1) Operation => Frequency Increase Compression Ratio ε > 7.5 High-Pressure Ratio Control at Heating ε...
  • Page 308 8 Troubleshooting (3*) 230V 400V Current (A) 10.5 16.0 24.0 24.0 17.5 20.0 (4*) 230V 400V Demand setting 100% 11.5 13.0 17.0 20.0 11.0 Current (A) 10.0 13.0 15.0 10.0 (5*) 230V 400V Current (A) 12.0 15.0 18.5 13.0 13.0 SMGB0064 rev.0 - 08/2011...

  • Page 309: Procedure For Checking Each Main Part

    8 Troubleshooting 8.3 Procedure for checking each main part 8.3.1  Self-checking procedure of PCB by means of the Remote Control Switch Use the following troubleshooting procedure for testing the PCB in the indoor unit and outdoor unit: If you are using a wireless remote control switch with the built-in receiver part of the wall-type indoor unit and you need to perform the above checking, perform the following procedure: 1 Turn OFF the power supply.
  • Page 310 8 Troubleshooting 4 Turn ON the power supply. After finishing the checking, turn OFF the power supply again and reconnect the connectors according to the previous situation before the checking. N O T E • If this indication continues and the alarm code J1is not displayed, this means that each one of indoor unit is not connected to the remote control switch.

  • Page 311: Self-Checking Of The Remote Control Switch

    8 Troubleshooting 8.3.2  Self-checking of the remote control switch Cases where the CHECK switch is used: 1 If the remote control switch displays a malfunction. 2 For the regular maintenance check. Changing of LCD Indication Only for Indicating Turn ON the power source. LCD Indication Period cancellation (sec.)
  • Page 312 8 Troubleshooting The LCD indication changes as shown below. The detected temperature of remote control thermostat is indicated at the part (A) in the figure below. If the number "- -" or "FF" is indicated at the (A) part, the remote control thermostat is abnormal. In case of depressing the RESET switch or The LCD indication changes as leaving the switches for 15 seconds, the data...

  • Page 313: Self-Checking Procedure Of The Indoor Unit Pcb (Only For Rpk)

    8 Troubleshooting 8.3.3  Self-Checking procedure of the Indoor Unit PCB (only for RPK) Self-checking procedure by means of the relays on the indoor unit PCB • To check the abnormal operation on the indoor unit PCB due to a malfunction. • To check the abnormal operation on the indoor unit PCB according to the results of the checking procedure by means of the CHECK switch on the remote control switch and the self-checking function.
  • Page 314 8 Troubleshooting    Procedure of checking other main parts Procedure of checking other main parts for IVX Series 1. High voltage discharge work for replacing parts D A N G E R • Perform this high voltage discharge work to avoid an electric shock • DIP-IPM Procedure: a. Turn OFF the main switches and wait for three minutes. Check to ensure that no high voltage exists. If LED201 is ON after start-up and LED201 is OFF after turning OFF power source, the voltage will decrease lower than DC50V.
  • Page 315 8 Troubleshooting 2. Checking method of transistor module • Outer appearance and internal circuit of transistor module 1. Drive circuit. 2. Overheating protection circuit. 3. Sensor. • Procedure: Remove all the terminals of the transistor module before check. If items (a) to (d) are performing and the results are satisfactory, the transistor module is normal.
  • Page 316 8 Troubleshooting 3. Checking method of diode module If items (a) to (d) are performing and the results are satisfactory, the diode module is normal. Measure it under 1kΩ range of a tester. Do NOT use a digital tester. a. By touching the + side of the tester to the + terminal of diode module and the - side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance.
  • Page 317 8 Troubleshooting • Fault diagnosis procedure Fault diagnosis of DC fan motor. About fan motor fault diagnosis: When ISPM/DIP-IPM is faulty and Alarm 53 appears, the fan motor may also be damaged. After replacing the new ISPM/DIP-IPM, ISPM/DIP-IPM will be damaged again if it operates with a damaged fan motor. Check also if the fan motor is not damaged when IPM/DIP-IPM is replaced.
  • Page 318 8 Troubleshooting Wire color for checking (normal value) Model Motor model Red-Black White-Black Yellow-Black Blue-Black RAS-4H(V)RNM2E (upper) SIC-65FV-D840-1 1 MΩ or greater 26~50kΩ 168~312kΩ 1 MΩ or greater RAS-(4-6)H(V)RNM2E (lower) RAS-3HVRNM2E RAS-(5-6)HVRNM2E (upper) SIC-68FV-D851-7 1 MΩ or greater 42-78kΩ 168~312Ω 1 MΩ...
  • Page 319 8 Troubleshooting a. By touching the + side of the tester to the P1 terminal of ISPM and the - side of the tester to R and S of ISPM, measure the resist- ance. If all the resistances are more than 1 kΩ, it is normal. b.
  • Page 320 8 Troubleshooting • Checking procedure for the electronic expansion valve Valve position Electronic expansion valve Outdoor unit electronic expansion valve Check the temperature of the piping in the heat- It is abnormal if the liquid pipe pressure does Locked fully closed ing process.
  • Page 321 8 Troubleshooting • Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serie No. Production Date: Checker: Check item Check method Result Remarks Is THM9 correctly connected? 1. Is wire of thermistor correctly connected by viewing? THM9: Discharge Gas Thermistor 2.
  • Page 322 8 Troubleshooting Check item Additional information (mechanism of the compressor failure) 3 & 4 Overcurrent control (operating frequency control) is performed by detecting current by the PCB2. In this case, winding insulation failure will occur, since control is not available in spite of actually high current. 5 &...
  • Page 323 8 Troubleshooting Procedure: a. Turn OFF the main switches and wait for three minutes. Check to ensure that no high voltage exists. If LED201 is ON after start-up and LED201 is OFF after turning OFF power source, the voltage will decrease lower than DC50V. b.
  • Page 324 8 Troubleshooting 2. Inverter module checking procedure • Internal Circuit of Rectified Part of DIP-IPM Non-faulty if [1] – [8] are checked and satisfied. (Measure with 1 kΩ range of a tester.) N O T E DO NOT use a digital tester 1.
  • Page 325 8 Troubleshooting 5. Touch [+] of the tester to [P] of DIP-IPM (soldered part), and [-] to DIP-IPM U, V, W terminals to measure the resistance. Normal if all three terminals have 1 kΩ or greater. 6. Contrary to [5], touch [-] of the tester to [P] of DIP-IPM (soldered part), and [+] to DIP-IPM U, V, W terminals to measure the resist- ance .
  • Page 326 8 Troubleshooting • DIP-IPM a. Turn OFF the main switches and wait for three minutes. Check to ensure that no high voltage exists. If LED201 is ON after start- up and LED201 is OFF after turning OFF power source, the volt- age will decrease lower than DC50V.
  • Page 327 8 Troubleshooting Procedure: Remove all the terminals of the transistor module before check. If items (a) to (d) are performing and the results are satis- factory, the transistor module is normal. Measure it under 1kΩ range of a tester. Do NOT use a digital tester. a.
  • Page 328 8 Troubleshooting b. By touching the - side of the tester to the + terminal of diode module and the + side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance. If all the resistances are greater than 500kΩ, it is normal. c.
  • Page 329 8 Troubleshooting d. By touching the + side of the tester to the - terminal of diode module and the - side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance. If all the resistances are greater than 500kΩ, it is normal. •...
  • Page 330 8 Troubleshooting a. By touching the + side of the tester to the P1 terminal of ISPM and the - side of the tester to R and S of ISPM, measure the resist- ance. If all the resistances are more than 1 kΩ, it is normal. b.
  • Page 331 8 Troubleshooting • Checking procedure for the electronic expansion valve Valve position Electronic expansion valve Outdoor unit electronic expansion valve Check the temperature of the piping in the heat- It is abnormal if the liquid pipe pressure does Locked fully closed ing process.
  • Page 332 8 Troubleshooting Wire color for checking (normal value) Model for ES Motor model Red-Black White-Black Yellow-Black Blue-Black RAS-(2/2.5)HVRN2 FPD10U4OS-902 or 13.5 ~ 14.4 1 MΩ or greater 225~226 kΩ 1 MΩ or greater DAJ12-55V71 RAS-3HVRNS2 RAS-4H(V)RNS2E SIC-68FV-D851-7 1 MΩ or greater 42 ~ 78 kΩ...
  • Page 333 8 Troubleshooting • Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serie No. Production Date: Checker: Check item Check method Result Remarks Is THM9 correctly connected? 1. Is wire of thermistor correctly connected by viewing? THM9: Discharge Gas Thermistor 2.
  • Page 334 8 Troubleshooting Additional Information for “CHECK LIST ON COMPRESSOR” Check item Additional information (mechanism of the compressor failure) 1 & 2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high.

  • Page 335: Spare Parts

    9 Spare Parts S p a r e P a r t s Index 9.1. Spare parts for IVX Series........................326 9.2. Spare parts for ES Series........................341 SMGB0064 rev.0 - 08/2011...

  • Page 336: Spare Parts For Ivx Series

    9 Spare Parts 9.1 Spare parts for IVX Series RAS-3HVRNM2E • Cycle and structural parts SMGB0064 rev.0 - 08/2011...
  • Page 337 9 Spare Parts Part name Remarks Rear Cover S Assy Assembly H-Cover Handle Piping Cover Rear Piping Cover Upper Cover Assy Assembly Service Cover S Assy Assembly S Cover B Lower Service Cover Protection Net S Assy Shroud S Unit Air Grille Air Outlet Shroud S...
  • Page 338 9 Spare Parts • Electrical parts Part name Remarks Electrical Wiring Diagram Assembly(Steel Plates+Components+Harness) P Plate Assy Assembly (2-1~2-9) Reactor Noise Filter Magnetic Contactor Spacer For Noise Filter Transformer Fuse Terminal Board Printed Circuit Board PCB Main (PO052 Assy) Holder For PCB Main Power Unit Assy Inverter Fin Assy...
  • Page 339 9 Spare Parts RAS-(4-6)HVRNM2E • Cycle and structural parts SMGB0064 rev.0 - 08/2011...
  • Page 340 9 Spare Parts Part name Remarks Rear Cover L Assy Assembly H-Cover Handle Piping Cover Rear Piping Cover Upper Cover Assy Assembly S Cover B Lower Service Cover Protection Net L Assy Shroud L Unit Air Grille Air Grille Shroud L Motor Clamp L Assy Fan Motor 5/6 HP MOF1: DC100W, 8P / 4 HP MOF1: DC74W, 8P...
  • Page 341 9 Spare Parts Part name Remarks Electrical Wiring Diagram Assembly (2+3+harness) P-Plate Assy Assembly (2-1~2-13) P-Plate Unit Terminal Board Transformer Printed Circuit Board PO081 Assy Noise Filter Reactor Unit Fuse Holder Fuse Mag. Contactor CMC1 2-10 Spacer For Noise Filter 2-12 Spacer For PCB1...
  • Page 342 9 Spare Parts RAS-(4-6)HRNM2E • Cycle and structural parts SMGB0064 rev.0 - 08/2011...
  • Page 343 9 Spare Parts Part name Remarks Rear Cover L Assy Assembly H-Cover Handle Piping Cover Rear Piping Cover Upper Cover Assy Assembly Service Cover L Assy Assembly S Cover B Lower Service Cover Protection Net L Assy Shroud L Unit Air Grille Air Grille Shroud L...
  • Page 344 9 Spare Parts • Electrical parts SMGB0064 rev.0 - 08/2011...
  • Page 345 9 Spare Parts Part name Remarks Electrical Wiring Diagram Assembly (2+3+harness) P-Plate Assy Assembly (2-1~2-13) P-Plate Unit Terminal Board Transformer Printed Circuit Board PO081 Assy Noise Filter Reactor Unit Fuse Holder Fuse 2 x 20A Mag. Contactor CMC1 2-10 Spacer For Noise Filter 2-12 Spacer...
  • Page 346 9 Spare Parts RAS-(8-12)HRNM • Cycle and structural parts U77B U77E U30D U01B U01A U40A U01C U77B U77A U30C U30B U27A U27B U77C U21A U21B U77D U30A U15A U71B U15B U40B U15C U71A U32B U32A U98A U98B SMGB0064 rev.0 - 08/2011...
  • Page 347 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U01C Pressure SW Low pressure Fuse 40 A - 60 A U14A Capacitor 4700 μF U14B Capacitor 7 μF U15A Thermistor — U15B Thermistor —...
  • Page 348 9 Spare Parts • Electrical parts U74A U14A U65C U74B U65A U14A U65B U85C U85D U65D U82B U85B U14B U85A U15D View from P View from Q U65A U82A U65B U85E U16B U74C U16A U65C SMGB0064 rev.0 - 08/2011...
  • Page 349 9 Spare Parts • Electrical parts (cont) U82A U74C U14A U65D U85A U15D View from P U65A U65C U65B U85C U85D U65B U16A U82B U14B Drawing number: SPN200617 (RAS-8~12HRNM) SMGB0064 rev.0 - 08/2011...
  • Page 350 9 Spare Parts Part name Remarks L-tank assy — U65A Plastic material — U65B Plastic material — U65C Plastic material — U65D Plastic material — Compressor — U71A Motor — U71B Motor — Mag. contactor — U74A Resistor — U74B Resistor —...

  • Page 351: Spare Parts For Es Series

    9 Spare Parts 9.2 Spare parts for ES Series RAS-(2/2.5)HVRN2 • Cycle, structural and electrical parts U34B U15C U15A U32B U21B U21A U01A U01B U15B U32A U34A U27B U27A SMGB0064 rev.0 - 08/2011...
  • Page 352 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U15A Thermistor TA (Ambient) U15B Thermistor TE (Evaporation) U15C Thermistor TD (Discharge) U21A Expansion valve — U21B Coil for expansion valve — U27A Stop valve Gas line U27B Stop valve...
  • Page 353 9 Spare Parts RAS-3HVRNS2 • Cycle, structural and electrical parts U98A U34B U15C U15A U32B U98E U21B U21A U01A U01B U15B U98B U32A U98D U34A U27B U27A U98C SMGB0064 rev.0 - 08/2011...
  • Page 354 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW Control Fuse U15A Thermistor TA (Ambient) U15B Thermistor TE (Evaporation) U15C Thermistor TD (Discharge) U21A Expansion valve — U21B Coil for expansion valve — U27A Stop valve U27B Stop valve Liquid...
  • Page 355 9 Spare Parts RAS-(4-6)HVRNS2E • Cycle, structural SMGB0064 rev.0 - 08/2011...
  • Page 356 9 Spare Parts Part name Remarks Rear Cover S Assy Assembly H-Cover Handle Piping Cover Rear Piping Cover Upper Cover Assy Assembly Service Cover Assy Assembly S Cover B Lower Service Cover Protection Net Shroud S Assy Shroud S Air Grille Air Grille Clamp Assy Fan Motor...
  • Page 357 9 Spare Parts • Electrical parts SMGB0064 rev.0 - 08/2011...
  • Page 358 9 Spare Parts Part name Remarks Electrical Wiring Diagram Assembly (2+3+harness) P-Plate Assy Assembly (2-1~2-13) P-Plate Unit Terminal Board Transformer Printed Circuit Board PO081 Assy Noise Filter Reactor Unit Fuse Holder Fuse Mag. Contactor CMC1 2-10 Spacer For Noise Filter 2-12 Spacer For PCB1...
  • Page 359 9 Spare Parts RAS-(4-6)HRNS2E • Cycle, structural SMGB0064 rev.0 - 08/2011...
  • Page 360 9 Spare Parts Part name Remarks Rear Cover S Assy Assembly H-Cover Handle Piping Cover Rear Piping Cover Upper Cover Assy Assembly Service Cover Assy Assembly S Cover B Lower Service Cover Protection Net Shroud S Assy Shroud S Air Grille Air Grille Clamp Assy Fan Motor...
  • Page 361 9 Spare Parts Electrical parts SMGB0064 rev.0 - 08/2011...
  • Page 362 9 Spare Parts Part name Remarks Electrical Wiring Diagram Assembly (2+3+harness) P-Plate Assy Assembly (2-1~2-13) P-Plate Unit Terminal Board Transformer Printed Circuit Board PO081 Assy Noise Filter Reactor Unit Fuse Holder Fuse 2 x 20A Mag. Contactor CMC1 2-10 Spacer For Noise Filter 2-12 Spacer...
  • Page 363 9 Spare Parts RAS-(8/10)HRNSE • Cycle and structural SMGB0064 rev.0 - 08/2011...
  • Page 364 9 Spare Parts Part name Remarks Rear Cover Assy Assembly H-Cover — Handle — Piping Cover B Rear Piping Cover Upper Cover Assy Assembly Service Cover Assy Assembly S Cover B Lower Service Cover Protection Net — Shroud Assy — Air Grille Air Outlet Shroud...
  • Page 365 9 Spare Parts Part name Remarks Valve Stay — Valve Stay Not included in 27 Thermistor TA (Air) Thermistor TE (Piping) Thermistor TD (Compressor) Thermo Attaching Plate — Condenser Support — Accessory Pipe — SMGB0064 rev.0 - 08/2011...
  • Page 366 9 Spare Parts • Electrical parts SMGB0064 rev.0 - 08/2011...
  • Page 367 9 Spare Parts Part name Remarks Attaching P-Plate Assy Assembly (1-1~1-14) Attaching P-Plate — Printed Circuit Board PCB Main (PO 052) Printed Circuit Board PCB for AC Fan Motor (PO 083) Plastic Material Spacer Plastic Material Spacer Plastic Material Spacer Transformer Terminal Board Noise Filter...

  • Page 369: Servicing

    10 Servicing S e r v i c i n g Index 10.1. Introduction............................360 10.2. Servicing for IVX series ........................361 10.2.1. Outdoor unit RAS-3HVRNM2E ........................ 361 10.2.2. Outdoor units RAS-(4-6)H(V)RNM2E ...................... 372 10.2.3. Oudoor units RAS-(8-12)HRNM ......................385 10.3.

  • Page 370: Introduction

    10 Servicing 10.1 Introduction D A N G E R • Before performing any of the service operations described in this chapter turn all the main switches off and the place security lockers or convenient warning indicators in order to prevent them from turning on accidentally. •...

  • Page 371: Servicing For Ivx Series

    10 Servicing 10.2 Servicing for IVX series 10.2.1  Outdoor unit RAS-3HVRNM2E    Removing service cover N O T E • Remove the main parts according to the following procedures. To reassemble perform the procedures in reverse. To prevent contamination of the refrigerant with water or foreign particles do not expose open to atmos- phere for long periods.
  • Page 372 10 Servicing    Removing air outlet grille 1 Remove the four (4) fixing screws. 2 Lift the air outlet grille holding the lower parts. 3 Release the extruded hook of the air outlet grille from the shroud. 1. Air outlet grille. 2.
  • Page 373 10 Servicing 6 Fix the motor wire with the cable tie or the cord clamp. If not it may cause the disconnection of the fan motor’s lead wire. 7 In order to avoid cutting edges mount the rubber bush at the partition plate when inserting the motor wire through it. If not it may cause the disconnection to the fan motor’s lead wire.
  • Page 374 10 Servicing 1. Upper cover. 2. Rear panel. 3. Check joint. 4. Rear pipe cover. 5. Crankcase heater. 6. Valve Stay. 4 Remove the rubber cap and the thermistor on the top of the compressor. 1. Sound-proof cover. 2. Oil heater. 3.
  • Page 375 10 Servicing 5 Remove the crankcase heater. (Oil heater on the lower case). 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9.
  • Page 376 10 Servicing N O T E • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle. After removing the compressor replace it quickly. If it is exposed to the ambiance for a long period seal both suction and discharge pipes.
  • Page 377 10 Servicing Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 — — — —    Opening electrical box (P-mounting plate) 1 Remove the service cover according to the section Removing service cover, see on page 361 in this chapter. 2 Remove the six (6) screws fixing the electrical box.
  • Page 378 10 Servicing    Removing expansion valve coil 1 Remove the service cover according to the section Removing service cover, see on page 361 in this chapter. 2 Open the P-mounting plate according to the section Opening electrical box (P-mounting plate), see on page 367 in this chapter .
  • Page 379 10 Servicing 1. Brazing. 2. Reversing valve. 3. Mounting plate. 4. Screw. 5. Compressor. 6. Cover by wet cloth.    Removing expansion valve 1 Remove the service cover and rear service panel according to the sections Removing service cover, see on page 361 and Removing bottom service cover and rear cover, see on page 361.
  • Page 380 10 Servicing    Remove the electrical components D A N G E R • Do not touch the electrical components of the PCB directly. • When handling the PCB take care of components. Do not apply excessive force to them in order to avoid da- maging the motherboard and failures.
  • Page 381 10 Servicing    Removing “W” electrical componets surface 1 Remove the service cover according to the section Removing service cover, see on page 361 in this chapter. 2 Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-moun- plate), see on page 367 in this chapter.

  • Page 382: Outdoor Units Ras-(4-6)H(V)Rnm2E

    10 Servicing 10.2.2  Outdoor units RAS-(4-6)H(V)RNM2E    Removing service cover N O T E • Remove the main parts according to the following procedures. To reassemble perform the procedures in reverse. To prevent contamination of the refrigerant with water or foreign particles do not expose open to atmos- phere for long periods.
  • Page 383 10 Servicing    Removing upper cover 1 Remove all the screws fixing the upper cover both on the front and back of the machine. 2 Lift the upper cover upwards. 1. Upper cover.    Removing the lower part of service panel and rear panel 1 Remove the five (5) fixing screws at the lower part of the servi- ce panel and remove the lower part of the service panel by pu- lling towards the front side.
  • Page 384 10 Servicing If the fan blade get stuck when trying to remove it use a puller to disassembly the fan. 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Fan Motor. 4. Screw with spacer. Fan components and technical features 230V/50Hz Power supply 400V/50Hz...
  • Page 385 10 Servicing 1. Partition plate. 2. Cord holder or cable tie. 3. Rubber bush. 4. Install DC motor to this position facing down the trap. 6 Fix the motor wire with the cable tie or the cord clamp. If not it may cause the disconnection of the fan motor’s lead wire.
  • Page 386 10 Servicing 1. Sound-proof cover. 2. Oil heater. 3. Cut part. 4. Direction to remove the cover. 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8.
  • Page 387 10 Servicing N O T E • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle. After removing the compressor replace it quickly. If it is exposed to the ambiance for a long period seal both suction and discharge pipes.
  • Page 388 10 Servicing 1. Suction pipe. 2. Discharge pipe. 3. Cover pipes with wet cloth. 4. See compressor position table below. 5. Vibration-Proof rubber 2. 6. Nut and washer. 7. Vibration-Proof rubber 1. Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2...
  • Page 389 10 Servicing    Removing high pressure switch and control pressure switch 1 Remove the service cover according to the section Removing service cover, see on page 372 in this chapter 2 Collect the refrigerant from the check joint according to the sec- tion compressor, see on page 375 in this chapter. Removing the 3 Disconnect the fasten terminals from the pressure switches.
  • Page 390 10 Servicing D A N G E R • Check that the LED201 (red) located on the “W” surface PCB is OFF when opening the P-mounting plate. • Do not touch the electrical components when LED201 (Red) located on the “W” surface PCB is ON in order to avoid an electrical shock.
  • Page 391 10 Servicing    Removing expansion valve coil 1 Remove the service cover according to the section Removing service cover, see on page 372 in this chapter. 2 Open the P-mounting plate according to the section Opening electrical box (P-mounting plate), see on page 379 in this chapter .
  • Page 392 10 Servicing 1. Brazing. 2. Reversing valve. 3. Mounting plate. 4. Screw. 5. Compressor. 6. Cover by wet cloth.    Removing expansion valve 1 Remove the service cover and rear service panel according to the section cover, see on page 372 and Removing service Removing the lower part of service panel and rear panel, see on page 373.
  • Page 393 10 Servicing    Removing electrical components D A N G E R • Do not touch the electrical components of the PCB directly. • When handling the PCB take care of components. Do not apply excessive force to them in order to avoid da- maging the motherboard and failures.
  • Page 394 10 Servicing    Removing “W” electrical components surface 1 Remove the service cover according to the section Removing service cover, see on page 372 in this chapter. 2 Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-moun- ting plate), see on page 379 in this chapter.

  • Page 395: Oudoor Units Ras-(8-12)Hrnm

    10 Servicing 3 Check to ensure the LED201 (Red) of the inverter PCB is off when opening P-mounting plate. 4 Remove other electrical components according to the procedure below and the figures on Chapter 10. D A N G E R •...
  • Page 396 10 Servicing    Removing air outlet grille 1 Remove the eight (8) fixing screws. 2 Lift the air outlet grille holding the lower parts. 3 Release the extruded hook of the air outlet grille from the shroud. 1. Air outlet grille. 2.
  • Page 397 10 Servicing    Removing the lower part of service panel and rear panel 1 Remove the five (5) fixing screws at the lower part of the servi- ce panel and remove the lower part of the service panel by pu- lling towards the front side. Remove the upper cover according to section cover, see on page 386 in this chapter.
  • Page 398 10 Servicing Fan components and technical features Power supply 380-415V/50Hz PCB5 DC Fan Motor PCN203 (1 3) Fan Motor Comp. CN201 (2 3 4) PCB3 AC Fan Motor PCN404 (White) DC Fan Motor 4 x M6 screw (with spacer) Screw for motor fixing.
  • Page 399 10 Servicing    Removing the compressor 1 Remove the service cover and the lower part of the service panel according to the sections Removing service cover, see on page 385 and the section Removing the lower part of service panel and rear panel, see on page 387.
  • Page 400 10 Servicing 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9. Compressor wires. 10. Fix it with screw. 11. Compressor wires (3 wires). A.
  • Page 401 10 Servicing N O T E • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle. After removing the compressor replace it quickly. If it is exposed to the ambiance for a long period seal both suction and discharge pipes.
  • Page 402 10 Servicing Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 — — — —    Removing high pressure switch and control pressure switch 1 Remove the service cover according to the section Removing cover, see on page 385 in this chapter service 2 Collect the refrigerant from the check joint according to the sec- tion...
  • Page 403 10 Servicing    Opening electrical box (P-mounting plate) 1 Remove the service cover according to the section Removing service cover, see on page 385 in this chapter. • Remove the six (6) screws fixing the electrical box. Open the P-mounting plate by rotating it 90 degrees to the left. 1.
  • Page 404 10 Servicing 380-415V/50Hz 1: PCN7 (SVA2) 2: PCN6 (RVR) 3: PCN402 (SVA1 SVF) N O T E • Do not touch the electrical components when the LED201 (Red) located on surface “W” PCB is ON in order to avoid electrical shock. •...
  • Page 405 10 Servicing    Removing reversing valve 1 Remove the service cover and the rear service panel according to the section Removing service cover, see on page 385 Removing the lower part of service panel and rear panel, see on page 387 in this chapter. 2 Collect the refrigerant from the check joint according to the section Removing the compressor, see on page 389.
  • Page 406 10 Servicing • Electronic Expansion Valve (EV0): 2 brazing parts. • Perform the brazing to remove and reassemble the elec- tronic expansion valve by cooling with wet cloth. • Protect the connecting wires and pipe insulation from bra- zing flame. 1.
  • Page 407 10 Servicing    Removing electrical components D A N G E R • Check that the LED201 (red) located on the “W” surface PCB is OFF when opening the P-mounting plate. • Do not touch the electrical components when LED201 (red) located on “W” surface PCB is ON in order to avoid an electrical shock.
  • Page 408 10 Servicing    Removing inverter components 1 Remove the service cover according to the section Removing service cover, see on page 372 in this chapter. 2 Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-moun- ting plate), see on page 393 in this chapter.
  • Page 409 10 Servicing N O T E • Identify the terminal numbers with mark band. When reassembling the terminals have to be connected to the correct numbers . If incorrectly connected malfunctions or damages will occur. • Check to ensure that the electrical wires will not be caught between the assembled electrical components and the mounting plates when the PCB2 is reassembled.
  • Page 410 10 Servicing    Removing other electrical components 1 Remove the service cover according to the section Removing service cover, see on page 385 in this chapter. 2 Open the P-mounting plate by rotating it 90 degrees to the left according to the section Opening electrical box (P- mounting plate), see on page 393 in this chapter.

  • Page 411: Servicing For Es Series

    10 Servicing 10.3 Servicing for ES Series 10.3.1  Outdoor Units RAS-(2/2.5)HVRN2 and RAS-3HVRNS2    Removing pipe cover Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing.
  • Page 412 10 Servicing 5 Remove the electrical box cover. 6 Remove the fan motor connector (CN24) inserted into the PCB in the electrical box. Remove the fan motor lead wire fixed onto the motor clamp using a cord band. Remove four (4) screws which fixes the motor. 1.
  • Page 413 10 Servicing 1. Electrical box. 2. Heat exchanger. 3. Compressor-top thermistor. 4. Compressor wiring. 5. Terminal cover. 6. Side cover Soundproof cover. 5 Open the soundproof cover wrapped around the compressor and remove the terminal box cover of the compressor body.
  • Page 414 10 Servicing 7 Remove push nuts A and B which fixes the compressor. Lift the compressor and remove from the unit body. (C in the figure does not have a push nut). a. Check if the Faston terminal has any abnormality when replacing the compressor. (Ensure the pull out force greater than 20 N)If the Faston terminal is identified faulty replace to a new one.
  • Page 415 10 Servicing 1. High pressure switch. 2. Pressure switch for control. 3. Brazing.    Removing four-way valve coil 1 Remove the pipe cover following Removing pipe cover, see on page 401. 2 Remove three (3) fixing screws and remove the upper cover. 3 Remove the front cover following Removing front cover, see on page 401.
  • Page 416 10 Servicing 6 Remove the CN5A connector on the control PCB of the electrical box. 7 Hold and disconnect the coil of the expansion valve.The expansion valve coil is equipped with a lock mechanism.En- sure that the coil is locked when replacing. 1.
  • Page 417 10 Servicing 1. Electrical box cover. 2. Two screws. Removing Display PCB 1 Remove the pipe cover following Removing pipe cover, see on page 401. 2 Remove one (1) fixing screw and remove the terminal cover. 3 Disconnect all the wiring connected to the display PCB. 4 Hold the upper part of four (4) holders with long nose pliers and remove the display PCB.

  • Page 418: Outdoor Units Ras-(4-6)H(V)Rns2E

    10 Servicing 4 Removing Electrical Components. Remove the fixing screw and remove the reactor. • To mount components be sure to match the wiring connection with the mark band codes. 1. Electrical box cover. 2. Partition plate. 3. Fuse. 4. Electrical box. 5.
  • Page 419 10 Servicing 1 Pull downward and remove the service cover after removing three (3) upper and lower fixing screws. • Pay attention not to drop the service cover. 1. Service cover.    Remove outlet grille 1 Remove four (4) screws which fix the outlet grille. 1.
  • Page 420 10 Servicing    Removing bottom service cover and rear cover 1 Remove five (5) screws which fix the bottom service cover. Pull and remove the bottom service cover. 2 Remove the upper cover following Removing upper cover, see on page 409. 3 Remove seven (7) screws which fix the rear cover (eight (8) screws for two-fan models; the inlet grill is fixed with four (4)).
  • Page 421 10 Servicing 4 To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1. Fan motor lead wire. 2.
  • Page 422 10 Servicing    Removing electrical box 1 Remove the service cover following Removing service cover, see on page 408. 2 Remove the upper cover following Removing upper cover, see on page 409. 3 Remove four (4) screws which fix the electrical box. 4 Pull up and remove the electrical box.
  • Page 423 10 Servicing    Removing the compressor 1 Remove the service cover upper cover bottom service cover and rear cover following Removing service cover, see on page 408 Removing upper cover, see on page 409 and Removing bottom service cover and rear cover, see on page 410.
  • Page 424 10 Servicing 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9. Compressor wires. 10. Fix it with screw. 11. Compressor wires (3 wires). A.
  • Page 425 10 Servicing 8 Remove the suction pipe and discharge pipe from the compressor. • Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part in order to avoid burning. 9 Remove two (2) nuts which fix the compressor and remove the compressor. Lift the compressor and remove from the unit body.
  • Page 426 10 Servicing 1. Electrical box. 2. Upper cover. 3. Refrigerant amount controller. 4. Pressure switch for control. 5. High pressure switch. 6. Blazing. 7. Discharge pipe.    Opening electrical box (P plate) 1 Remove the service cover following Removing service cover, see on page 408 in this chapter. 2 Remove six (5) screws which fix the electrical box and open the P plate turning counter clockwise approximately 90°.
  • Page 427 10 Servicing 1. 4-way valve coil. 2. 4-way valve coil screw.    Removing electronic expansion valve coil 1 Remove the service cover following Removing service cover, see on page 408. 2 Open the P plate following Opening electrical box (P plate), see on page 416. •...
  • Page 428 10 Servicing    Removing solenoid valve coil (20A) 1 Remove the service cover following Removing service cover, see on page 372. 2 Remove one (1) screw and remove the solenoid valve upward. 1. Solenoid valve coil screw. 2. Solenoid valve coil. 3. Solenoid valve. ...
  • Page 429 10 Servicing Removing DIP-IPM 1 Remove the service cover following Removing service cover, see on page 408. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate), see on page 416. • Check that the LED201 (red) on DIP-IPM is OFF when the P plate is opened. D A N G E R •...

  • Page 430: Outdoor Units Ras-(8/10)Hrnse

    10 Servicing To mount components be sure to match the wiring connection with the mark band codes. View from P 10.3.3  Outdoor Units RAS-(8/10)HRNSE    Removing service cover N O T E Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal.
  • Page 431 10 Servicing    Removing air outlet grille 1 Remove the eight (8) fixing screws of the shroud. 1. Air outlet grille. 2. Shroud.    Removing upper cover 1 Remove nine (9) screws fixing the upper cover and remove the upper cover upward. 1.
  • Page 432 10 Servicing 1. Air outlet grille. 2. Rear cover. 3. Lower part of service cover. 4. Fixing portion for outdoor temperature thermistor. 5. Air inlet grille (rear side). 6. Pull N O T E • DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
  • Page 433 10 Servicing Model RAS-8/10HRNSE PCB5 DC Fan Motor PCN203 (White) Fan Motor Comp. Nº CN201 (White) PCB3 AC Fan Motor PCN404 (White) DC Fan Motor 4 x M6 screw (with spacer) Screw for motor fixing. AC Fan Motor 4x M6 screws Motor clamp and wiring fixing position 1.
  • Page 434 10 Servicing 1. Motor clamp. 2. Fix the motor lead wires by the cord clamp. 3. Rubber Bush. 4. Pass the motor lead wires through the square hole of the electrical box. 5. Electrical Box. 6. Pass the motor lead wires through the harness lifter and connect them to the PCB3 (for MOF1) and PCB5 (for MOF2). 7.
  • Page 435 10 Servicing noid Valve, see on page 432. 4. Remove the Faston terminals of high pressure switch and the pressure switch for control from the switch body. 5. Remove connectors on the control PCB. THM7 (Outdoor Air) THM8 (Piping) THM9(Compressor-top) PCN5(Crankcase Heater) 6.
  • Page 436 10 Servicing 6 Remove the rubber cap and the thermistor attached on top of the compressor. 7 Remove the crankcase heater. 1. Sound-proof cover. 2. Oil heater. 3. Cut part. A. Direction to remove the cover. 1. Thermistor holder 2. Holder 3.
  • Page 437 10 Servicing N O T E • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust into the cycle.
  • Page 438 10 Servicing N O T E • Fix the lead wire for the compressor firmly not to contact with metal sheet edge and high temperature piping. Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 —...
  • Page 439 10 Servicing    Opening electrical box (P-Mounting Plate) 1 Remove the service cover following Removing service cover, see on page 420. 2 Remove six (6) screws which fix the electrical box and open the P plate turning counter clockwise approximately 90°. • Check that the LED201 (red) on the inverter PCB (PCB2) is OFF when opening P-mounting plate.
  • Page 440 10 Servicing 3 Remove the connector (PCN6) on the control PCB (PCB1) of the electrical box. 4 Remove the reversing valve coil by removing one (1) screw fixing the coil. 1. Upper cover. 2. Power Plate. 3. PCN6. 4. Fixing screw for reversing valve coil. 1.
  • Page 441 10 Servicing 1. CN5A. A. PCB1. N O T E • DO NOT touch electrical components while LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off.    Removing solenoid valve coil (20A) 1 Remove the service cover following Removing service cover, see on page 420.
  • Page 442 10 Servicing 8 Reassemble the parts in the reverse order of removing procedures. Details for Removing Band 1. Band (RAS-8HRNSE Only) 2. Removing brazing part (Outdoor heat 1. Screw. exchange). 2. P. 3. Reversing Valve. 3. Silicon Plate. 4. Removing Brazing part (Gas stop val- ve).
  • Page 443 10 Servicing    Removing electrical components Removing control PCB (PCB1) and Relay (PCB3 PCB5) 1 Remove the service cover following Removing service cover, see on page 420. 2 Remove all the wiring connected to the control PCB. 3 Move the four (4) holders to the direction marked with the arrow and remove the PCB. Removing Relay PCB (PCB3 PCB5) 1 Remove the service cover following the Removing service...
  • Page 444 10 Servicing • 2 Disconnect the wirings of U V and W on the transistor module (IPM). 3 Remove the four (4) M3 screws for the PCB2 and then remove the PCB2 from the transistor module. 4 Remove the bushes and the collars from the PCB2. When remounting attach those bushes and collars. Part Quantity P-Mounting Plate...
  • Page 445 10 Servicing Removing Diode Module (DM) Disconnect all the wirings connected to the diode module as shown below. 1 Disconnect the wirings of terminal + - U V W on the diode module. 2 Remove two (2) M5 fixing screws on the diode module. 3 Remove the diode module from the electrical box.
  • Page 446 10 Servicing Removing Capacitors (CB1 CB2) Disconnect all the wirings connected to the capacitors (CB1 CB2). 1 The wire has the polar characters. Identify the wire mark band and the indication on the capacitor when wire connecting. 2 Remove two (2) screws and two (2) saddles fixing the capacitor and remove each capacitor. Removing Magnetic Contactor (CMC1) 1 Disconnect all the wirings connected to the magnetic contactor (CMC1).
  • Page 447 10 Servicing Part Quantity M4 Screw for CB1 — M4 Screw for DLC — M4 Screw for CMC1 CMC1 — M4 Screw for Resistor — — CB-Mounting Plate — — — — M4 Screw for Resistor — — M4 Screw for CB2 Saddle —...

  • Page 449: Electrical Checks Of Main Parts

    11 Electrical checks of main parts E l e c t r i c a l c h e c k s o f m a i n p a r t s Index 11.1. Inverter ..............................440 11.1.1. Inverter for IVX Series ..........................440 11.1.2.

  • Page 450: Inverter

    11 Electrical checks of main parts 11.1 Inverter 11.1.1  Inverter for IVX Series    Specifications of inverter Applicable model RAS-(4-12)HRNM(2)(E) RAS-(3-6)HVRNM(2)E 3 Phase 400V 50 Hz RAS-(4-6)HRNM2E Applicable power source 1 Phase. 230V 50 Hz 3 Phase 380-415V 50 Hz RAS-(8-12)HRNM Input current RAS-(4-12)HRNM(2)(E) 6-25A RAS-(3-6)HVRNM(2)E 15-30A Control Method...
  • Page 451 11 Electrical checks of main parts Protection function Applicable model RAS-(4-12)HRNM(2)(E) RAS-(3-6)HVRNM(2)E Excessive low voltage at a voltage is lower than Excessive low voltage at a voltage is lower than 350 V DC 194 V DC Excessive high or low voltage for inverter Excessive high voltage at a voltage is higher than Excessive high voltage at a voltage is higher than 750 V DC...
  • Page 452 11 Electrical checks of main parts    Inverter time chart 1. Main circuit power source. 2. Frequency instruction. 3. Output voltage. 4. Soft start-stop (frequency). 5. Failure signal. 6. Activation of protection device. 7. Overload signal. 8. Charged indication. A. Frequency HIGH. B.
  • Page 453 11 Electrical checks of main parts    Protective function  1 Excessive high or low voltage for inverter a. Level of detection • When the voltage of direct current is greater than (A) V abnormalities are detected. • When the voltage of direct current is smaller than (B) V abnormalities are detected. Power supply 400V 50Hz / 380-415V 50Hz 230V 50Hz...
  • Page 454 11 Electrical checks of main parts 5 Fin temperature increase a. Level of detection When the temperature of internal thermistor exceeds more than 100 ºC an abnormality is detected. b. Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1.

  • Page 455: Inverter For Es Series

    11 Electrical checks of main parts 11.1.2  Inverter for ES Series    Specifications of inverter Applicable model RAS-(2-3)HVRN(S)2 RAS-(4-6)HVRNS2E RAS-(4-6)HRNS2E RAS-(8/10)HRNSE Applicable power source 1 Phase. 220-240V 50 Hz 1 Phase. 230V 50 Hz 3 Phase 400V 50 Hz 3 Phase 400V 50 Hz Output current 10.5A 17A (4 HP) 25A(5/6HP)
  • Page 456 11 Electrical checks of main parts Protection function RAS-(8/10)HRNSE Applicable model RAS-(2-3)HVRN(S)2 RAS-(4-6)HVRNS2E RAS-(4-6)HRNS2E Excessive low voltage at a voltage is Excessive low voltage at a voltage is lower than 194 V DC lower than 350 V DC Excessive high or low Excessive high voltage at a voltage is higher than 400 V DC voltage for inverter Excessive high voltage at a voltage is...
  • Page 457 11 Electrical checks of main parts Protection function RAS-(8/10)HRNSE Applicable model RAS-(2-3)HVRN(S)2 RAS-(4-6)HVRNS2E RAS-(4-6)HRNS2E IPM has four protection function for self-protection. 1 Some of the output terminals between “U” and “V” “V” and “W” “W” and “U” has a short- circuit.
  • Page 458 11 Electrical checks of main parts    Inverter time chart 1. Main circuit power source. 2. Frequency instruction. 3. Output voltage. 4. Soft start-stop (frequency). 5. Failure signal. 6. Activation of protection device. 7. Overload signal. 8. Charged indication. A. Frequency HIGH. B.
  • Page 459 11 Electrical checks of main parts    Protective function  1 Excessive high or low voltage for inverter a. Level of detection • When the voltage of direct current is greater than (A) V abnormalities are detected. • When the voltage of direct current is smaller than (B) V abnormalities are detected. Power supply 230V 50Hz 400V 50Hz...
  • Page 460 11 Electrical checks of main parts 5 Fin temperature increase a. Level of detection When the temperature of internal thermistor exceeds more than 100 ºC an abnormality is detected. b. Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1.

  • Page 461: Thermistor

    11 Electrical checks of main parts 11.2 Thermistor Thermistors for the outdoor unit 1. Thermistor for discharge gas temperature (THM9). 2. Thermistor for outdoor ambient temperature (THM7). 3. Thermistor for evaporating temperature (THM8). Thermistor for upper part temperature of compressor (For prevention of discharge gas overheating) 1 A thermistor for the upper part temperature of the compressor is installed to prevent discharge gas from overheating.
  • Page 462 11 Electrical checks of main parts Operation Upper part temperature of compressor Defecting period Over 132 ºC 10 minutes (continuously) Cooling Over 140 ºC 5 seconds (continuously) Over 132 ºC 10 minutes (continuously) Heating Over 140 ºC 5 seconds (continuously) Defrosting Over 132 ºC 5 seconds (continuously)

  • Page 463: Electronic Expansion Valve

    11 Electrical checks of main parts 11.3 Electronic expansion valve Micro-computer Pulse signal 2-Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control 1. Pulse motor. Precise control 2. Needle. Items Specifications Applicable to the models For the main cycle of: For IVX RAS-(4-12)H(V)RNM(2)(E) and ES RAS-(4-10)H(V)RNS(2)E Type UKV(10.0 USRT) series/UKV (5.0USRT) series for MVB...

  • Page 464: High Pressure Protection Device

    11 Electrical checks of main parts 11.4 High pressure protection device If the discharge pressure is excessively high the compressor and the component parts of the refrigeration cycle can be da- maged. Therefore in case that the discharge pressure is higher than 4.15 MPa (R410A) the protection control is activated and the compressor is stopped.

  • Page 465: Noise Filter (Nf)

    11 Electrical checks of main parts 11.5 Noise filter (NF) 11.5.1  Noise filter for 3N~ The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. RAS-(4-6)HRNM2E (400V/50Hz) / RAS-(4-6)HRNS2E (400V/50Hz) / RAS-(8-12)HRNM (380-415V/50Hz) / RAS-(8/10)HRNSE (400V/50Hz) Items...

  • Page 466: Noise Filter For 1

    11 Electrical checks of main parts 11.5.2  Noise filter for 1~ The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. RAS-(4-6)HVRNM2E (230V/50Hz) / RAS-(4-6)HVRNS2E (230V/50Hz) Items Specifications...

  • Page 467: Capacitor (Cb1 Cb2)

    11 Electrical checks of main parts 11.6 Capacitor (CB1 CB2) This part is used for changing the alternative current to the direct current for the inverter. Connect two capacitor in line and used. Items Specifications Models LNX2G472MSEAHE Capacity of static electricity 4700 μF Rated voltage 400 VDC...

  • Page 468: Reactor (Dcl)

    11 Electrical checks of main parts 11.7 Reactor (DCL) 11.7.1  Reactor (DCL) for 3N~  This part is used for changing the alternative current to the direct current for the inverter. RAS-(4-6)HRNM2E (400V/50Hz) / RAS-(4-6)HRNS2E (400V/50Hz) / RAS-(8-12)HRNM (380-415V/50Hz) / RAS-(8/10)HRNSE (400V/50Hz) Items Specifications Character 1.0 mH+10 (at 1 kHz) Rated current...

  • Page 469: Scroll Compressor

    11 Electrical checks of main parts 11.8 Scroll compressor 11.8.1  Reliable mechanism for low vibrating and low sound 1 The rotating direction is definite. 2 The pressure inside of the chamber is high pressure and the surface temperature of the chamber is 60 °C to 110 °C. 11.8.2 ...

  • Page 471: Maintenace Notes

    12 Maintenace notes M a i n t e n a c e n o t e s Index 12.1. Checking the power source and the wiring connection ............... 462 12.2. Burnt-out compressor due to an insufficient refrigerant charge ............463 12.3.

  • Page 472: Checking The Power Source And The Wiring Connection

    12 Maintenace notes 12.1 Checking the power source and the wiring connection Check the following items in the case of abnormal operation: Check item Procedure Is the breaker of the fuse cut Check the secondary voltage of the breaker and the fuse by means of a tester. out? Disconnect the secondary side of the transformer and check the voltage by means of a tester.

  • Page 473: Burnt-Out Compressor Due To An Insufficient Refrigerant Charge

    12 Maintenace notes 12.2 Burnt-out compressor due to an insufficient refrigerant charge Question and answer for the field work Example 1: Burnt-out compressor due to an insufficient refrigerant charge After commissioning the alarm code “08” sometimes occurred and the compressors were burnt out after operating for two Phenomenon months.

  • Page 474: Insufficient Cooling Performance When A Long Piping Is Applied

    12 Maintenace notes 12.3 Insufficient cooling performance when a long piping is applied Question and answer for the field work Example 2: Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position. If the location of an outdoor unit is 20 meters lower than the location of the indoor units resetting of the DIP switch DSW3 is required.

  • Page 475: Abnormally High Operation Sound (In The Ceiling Type Indoor Unit)

    12 Maintenace notes 12.4 Abnormally high operation sound (in the ceiling type indoor unit). Question and answer for the field work Example 3: Abnormally high operation sound (in-the-ceiling type indoor unit) Phenomenon The operation sound at the “HIGH” speed was abnormally high. The indoor units were installed without the ducts.

  • Page 476: Alarm Code "31

    12 Maintenace notes 12.5 Alarm code “31” Question and answer for the field work Example 4: Alarm code “31” Phenomenon Alarm code “31” sometimes occurred and the system stopped. The combination of the indoor units and the outdoor unit was the following. Power Source Cause...

  • Page 477: Not Cooling Well Due To Insufficient Installation Space For The Outdoor Unit

    12 Maintenace notes 12.6 Not cooling well due to insufficient installation space for the outdoor unit Question and answer for the field work Example 5: Not cooling well due to insufficient installation space for outdoor unit Cooling operation was well performed through the intermediate season. However the cooling operation was not well avai- Phenomenon lable when the outdoor temperature was higher than 35 °C.

  • Page 478: Caution With The Refrigerant Leakage

    12 Maintenace notes 12.7 Caution with the refrigerant leakage The designers and the installers have the responsibility to follow the local codes and the local regulations that specify the safety requirement against the refrigerant leakage. 12.7.1  Maximum permissible concentration of the HCFC gas The refrigerant R410A which is charged in the UTOPIA IVX/ES system is an incombustible non-toxic gas. However if the leakage occurs and the gas fills a room the gas may cause suffocation.

  • Page 479: Maintenance Work

    12 Maintenace notes 12.8 Maintenance work For the indoor unit and the outdoor unit 1 Fan and fan motor • Lubrication: All the fan motors are pre-lubricated and sealed at the factory. Therefore no lubrication maintenance is required. • Sound and vibration: Check for abnormal sounds and vibrations. •...

  • Page 480: Service And Maintenance Record

    12 Maintenace notes 12.9 Service and maintenance record Check item Action Judgement Is the service area sufficient? — Is there a short circuit of the discharged air? — Any heat influence? — Is the ground wire connected? — Refrigerant piping. —...
  • Page 481 12 Maintenace notes Check item Action Judgement Instructions to the client about the cleaning — Done Not yet method. Instructions to the client about the operation. — Done Not yet SMGB0064 rev.0 - 08/2011...

  • Page 482: Service And Maintenance Record Using The 7-Segment Display

    12 Maintenace notes 12.10 Service and maintenance record using the 7-segment display Customer’s name:________________________________ Date:____________________ Outdoor unit model (serial No. ) RAS- (Serial No. ) RAS- (Serial No. ) 1. Operation mode 2. Test run start time 3. Data collect start time 4.
  • Page 483 12 Maintenace notes Customer’s name:________________________________ Date:____________________ Outdoor unit model (serial No. ) RAS- (Serial No. ) RAS- (Serial No. ) 8.3 I.U. intake air temp. 8.4 I.U. discharge air temp. 8.5 Cause of I.U. stoppage N O T E • O.U.: Outdoor Unit.

  • Page 484: Service And Maintenance Record By Remote Control Switch

    12 Maintenace notes 12.11 Service and maintenance record by remote control switch Data sheet for checking by remote control switch Time I.U. modelo I.U. serial No. I.U. No. / alarm code Check Check 1·2 1·2 1·2 1·2 1·2 mode 1 mode 2 B Temp.
  • Page 485 12 Maintenace notes O.U. ex. valve 1 O.U. ex. valve 2 O.U. ex. valve B P Running current indication (reference) Comp. current SMGB0064 rev.0 - 08/2011...

  • Page 486: Pump-Down Method For Replacing The Compressor

    12 Maintenace notes 12.12 Pump-down method for replacing the compressor Procedure Remarks Turn off the main switch of the outdoor unit. Remove the covers the thermistor the crankcase heater the power Make sure that the terminal part of the detached power supply wirings and other items according to the chapter 10.
  • Page 488 Hitachi Air Conditioning Products Europe, S.A. Ronda Shimizu, 1 - Polig. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain Hitachi certifies that our products have met EU consumer safety, health and environmental requirements. Hitachi Air Conditioning Products Europe, S.A. is certified with:...

This manual is also suitable for:

Ras-(4-12)hrnm(2)(e)Ras-(2-3)hvrn(s)(2)Ras-(4-6)hvrns2eRas-(4-10)hrns(2)eRas-2hvrn2Ras-2.5hvrn2 ... Show all

Table of Contents