Hitachi RAS-E10H2 Service Manual

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SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

RAS-E10H2

SPECIFICATIONS

TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

COOLING

CAPACITY

TOTAL INPUT

TOTAL AMPERES

HEATING

CAPACITY

DIMENSIONS

(mm)

NET WEIGHT

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

FEBRUARY 2006 Hitachi Household Appliances (Wuhu) Co.,Ltd.

RAC-E10H2

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

(kg)

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

RAS-E10H2 /

RAC-E10H2

REFER TO THE FOUNDATION MANUAL

SPECIFICATIONS .............................. 4

HOW TO USE ................................ 5

CONSTRUCTION AND DIMENSIONAL DIAGRAM .... 15

MAIN PARTS COMPONENT .................... 17

WIRING DIAGRAM ............................ 19

WIRING DIAGRAM OF THE PRINTED WIRING BOARD .. 20

BLOCK DIAGRAM.............................. 25

BASIC MODE .................................. 27

REFRIGERATING CYCLE DIAGRAM ............ 36

DESCRIPTION OF MAIN CIRCUIT OPERATION...... 37

SERVICE CALL Q & A ........................ 67

TROUBLE SHOOTING

PROCEDURE FOR DISASSEMBLY AND REASSEMBLY.... 94

PARTS LIST AND DIAGRAM .................. 96

DC INVERTER (WALL TYPE)

INDOOR UNIT

RAS-E10H2

1 PHASE, 50Hz, 220-230V

700 (155 - 1,290)

3.75 - 3.59

2.50 (0.90 - 3.10)

8,530 (3,070 - 10,580)

880 (115 - 1,250)

4.45 - 4.26

3.40 (0.90 - 4.40)

11,600 (3,070 - 15,010)

780

280

210

9.5

NO. 0015E

CONTENTS

........................ 70

OUTDOOR UNIT

RAC-E10H2

700 (+68)

※

505

258

(+48)

※

After installation

※

Table of Contents

Summary of Contents for Hitachi RAS-E10H2

Page 1: Table Of Contents
11,600 (3,070 - 15,010) 700 (+68) ※ DIMENSIONS (mm) (+48) ※ NET WEIGHT (kg) After installation ※ SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT FEBRUARY 2006 Hitachi Household Appliances (Wuhu) Co.,Ltd.
Page 2 SAFETY DURING REP SAFETY DURING REP SAFETY AIR WORK 1. In order to disassemble and repair the unit in question, be sure to disconnect the power cord plug from the power outlet before starting the work. 2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit.
Page 3 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCT WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCT WORKING ST 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned.) 2.
Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of Al. stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1MΩ(1/2W) Staple Earth wirte Fig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate...
Page 5 CAUTION In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. When it thunders near by, by it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.
Page 6: Specifications
SPECIFICATIONS MODEL RAS-E10H2 RAC-E10H2 FAN MOTOR PWM DC35V 40 W FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR — ASC092CD COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 3.0A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR...
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Page 17: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS-E10H2 INDOOR UNIT Unit : mm Service space Top air suction grill Front panel Mounting plate Cabinet Air outlet Horizontal air diflector Wireless remote controller Drain When piping is ※ drawn from the left side,...
Page 18 MODEL RAC-E10H2 Unit : mm OUTDOOR UNIT Handle Handle Air outlet Air suction Rear side Air suction Fixing hole Holed for anchor bolt (2-ø12x16slots for ø8.0 bolt) Notch for anchor bolt (for 2-ø8 bolt) Drain hole Service space More than More than - 16...
Page 19: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications MODEL RAS-E10H2 THERMOSTAT MODEL OPERATION MODE COOL HEAT 16.7 (62.1) 18.7 (65.7) INDICATION 16.0 (60.8) 19.3 (66.7) TEMPERATURE 24.7 (76.5) 26.7 (80.1) INDICATION ˚C ( ˚F) 24.0 (75.2) 27.3 (81.1) 32.7 (90.9) 34.7 (94.5) INDICATION 32.0 (89.6)
Page 20 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-E10H2 ITEM COMPRESSOR TYPE ASC092CD POWER SOURCE DC 220 - 350 V OUTPUT 800W (U ) WHITE WINDING (W ) (V ) YELLOW 20 ˚C 2M = 1.15 RESISTANCE (Ω ) 2M = 1.40 75 ˚C YELLOW WHITE...
Page 21: Wiring Diagram
WIRING DIAGRAM CAUTION ＣＯＭＰＲＥＳＳＯＲ MODEL RAS-E10H2 / RAC-E10H2 ＢＬＵ：ＢＬＵＥＯＲＮ：ＯＲＡＮＧＥ The marked parts ＢＬＫ：ＢＬＡＣＫＲＥＤ：ＲＥＤ very important ones for safety. ＢＲＮ：ＢＲＯＷＮＷＨＴ：ＷＨＩＴＥＧＲＮ：ＧＲＥＥＮＹＥＬ：ＹＥＬＬＯＷＧＲＹ：ＧＲＡＹＷＨＴＹＥＬＲＥＤＣＮ１ＯＵＴＤＯＯＲＵＶＷＦＡＮＭＯＴＯＲＩＰＭ１ＡＦＵＳＥＰＮＭＣＮ２４ ...
Page 22 - 20 -...
Page 23 RAS-E10H2 MODEL Control P.W.B. Auto sweep motor Indicating P.W.B. Light receiving unit – 21 –...
Page 24 RAC-E10H2 MODEL ＧＲＡＹ（Ｓ２）ＣＯＭＰＲＥＳＯＲＭＯＲＴＯＲＭｏｕｎｔｉｎｇｆｏｒｍＰＣＢＳＥＴＭＡＩＮＰ.W.Ｂ. ＩＰＭＡ：ＡｘｉａｌｉｎｓｅｒｔｉｏｎＭ...
Page 25: Block Diagram
BLOCK DIAGRAM MODEL RAS-E10H2 / RAC-E10H2 INDOOR UNIT OUTDOOR UNIT Outdoor DC fan motor Power source 1ø 50Hz 220-230V HARMONICS POWER POWER RELAY RECTIFIER IMPROVEMENT SWITCH CIRCUIT Inrush current DC compressor Protection circuit motor Rotor magnetic pole position detection circuit...
Page 26: Basic Mode
BASIC MODE MODEL RAS-E10H2 - 27 -...
Page 27 Mode data file RAS-E10H2 LABEL NAME VALUE WMAX 4400 min –1 WMAX2 4400 min –1 WSTD 4200 min –1 WBEMAX 3200 min –1 CMAX 3200 min –1 CMAX2 3200 min –1 CSTD 2900 min –1 CKYMAX 2700 min –1 CJKMAX 2500 min –1...
Page 28 Table 1 Thermo judgment Item Temperature Thermo judgment (ON) 30°C Room CLMXTP temperature Thermo judgment (OFF) 32°C Thermo judgment (ON) 32°C Outdoor temperature Thermo judgment (OFF) 33°C Table 2 Compressor rpm Temperature Calculated difference compressor rpm (with shift value) 1.66°C 2200 min –1 button...
Page 29 Cooling Sleep Operation Dehumidifying Operation Room temperature 7 hr 1 hr Set to 7 hours Sleep button Operation lamp Timer lamp Remote control (Sleep) ON See basic Start Stop button operation Indoor fan Sleep Lo Outdoor fan Horizontal air Shut deflector Horizontal Facing down...
Page 30 Table 3 Compressor rpm Basic Heating Operation Temperature Calculated difference compressor rpm (with shift value) 2200 min 1.66°C –1 2600 min 2.00°C –1 3000 min 2.33°C Heating set temperature –1 (remote control set temperature (+)) 3400 min 2.66°C –1 3800 min 3.00°C –1 Dash period...
Page 31 Heating Sleep Operation Reversing Valve Defrosting Preheating released Sleep button Reversing valve (cooling "on" model 2min. 30sec. Sleep Lo 4400 2200 Notes: (1) The defrosting inhibit period is set as shown in the diagram below. When defrosting has finished once, the inhibit period is newly set, based on the outdoor temperature when the compressor was started.
Page 32: Refrigerating Cycle Diagram
REFRIGERATING CYCLE DIAGRAM MODEL RAS-E10H2 / RAC-E10H2 φ9.52 φ8.0 φ8.0 φ6.35 φ7.0 φ6.35 φ4.76 φ9.52 φ8.0 φ8.0 φ6.35 φ7.0 φ6.35 φ4.76 - 36 -...
Page 33: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS-E10H2 1. Reset Circuit NORMAL : HI RESET : LO Microcomputer R552 IC521 Fig. 1-1 Power "OFF" Power "ON" Voltage 5.0V Voltage supply to pin 2 of IC521 Reset enter at 4.2V Reset release at 4.4V Voltage 5.0V...
Page 34 2. Receiver Circuit Q141 R212 L201 R141 ZD141 C212 C211 RECEIVER I/P R211 R611 C611 Microcomputer Fig.2-1 IRR (light receiver unit) receives the infrared signal from the wireless remote controller. The receiver amplifie and shapes the signal and outputs it. 3.
Page 35 4. Auto Sweep Motor Circuit Auto sweep motor for horizontal air defectors IC711 Microcomputer Rotor Fig.4-1 Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pin 15 - 18 of microcomputer. Step width : 10ms Micro computer pins Horizontal air deflectors Fig.4-2 Microcomputer Output Signals...
Page 36 5. Initial Setting Circuit (IC401) • When power is supplied, the microcomputer reads the data in IC401 or IC402 (E PROM) and sets the preheating activation value and the rating and maximum speed of the compressor, etc. to their initial values. •...
Page 37 7. Fan Motor Drive Circuit CN10 Micro computer DC fan Fan motor motor output R751 C751 DC fan motor Speed feedback R631 C631 Fig. 7-1 Voltage at point A Waveform T1 = Low speed T2 = High speed Voltage at point B Waveform Voltage at point C Waveform...
Page 38 MODEL RAC-E10H2 1. Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000-3-2. When the compressor is stopped, the AC voltage becomes about 300 V and while the compressor operates, it is about 280 V.
Page 39 C021 and C022 This smoothes the voltage rectified for operating the compressor. When the input voltage is taken for the sine wave as shown in the top of Fig. 1-4, it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig.
Page 40 2. Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units. This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line.
Page 41 Fig. 2-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. CONTROL P.W.B. MAIN P.W.B. ６. ５Ｖ HIC ５ＶＣ８０１ＱＱ８０１Ｒ２６８３...
Page 42 Outdoor microcomputer Pin 48 Outdoor microcomputer Pin 48 Pin 51 Pin 51 Indoor microcomputer Pin 50 Indoor microcomputer Pin 50 Pin 49 Pin 49 35V DC line 33ms. 100ms. 1 frame Leader Fig. 2-2 Voltages Waveforms of Indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Pin 48 Outdoor microcomputer Pin 48 Pin 51...
Page 43 - 47 -...
Page 44 Fast feed 1/10000 for commercial test Compressor minimum rotation speed(4 MSB) Fast feed 1/1000 for commercial test Compressor minimum rotation speed(3) Rotary reversing valve being ON Compressor minimum rotation speed(2) Compressor minimum rotation speed(1) Compressor minimum rotation speed(0 LSB) Outdoor new communication bit Indoor new communication bit OVL up Fan-7-step request...
Page 45 Ｒ００８Ｃ０２２Ｃ０２１ - 49...
Page 46 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 3-2. At point E : U is ON, V is ON (circuit in Fig. is ON (circuit in Fig. is ON (circuit in Fig.
Page 47 – – – Fig. 3-4 Power module circuit (U is OFF, V is ON) is ON) Since current flows at point B only when U transistor and V transistor is ON, the current transistor is ON, the current waveform at –...
Page 48 - 52 -...
Page 49 〈In low speed operation〉 120° 120° 120° 120° 120° − ＋ − ＋ − ＋ − ＋ − ＋＋＋＋ − − − ＋＋＋ − − − Fig. 4-2 〈In high speed operation〉 120° 120° 120° 120° ...
Page 50 5. Power Circuit for P.W.B. W.B. • Fig. 5-1 shows the power circuit for P.W.B. AC220-230V C012 C013 Fig. 5-1 • In the power circuit for P.W.B., power supply for microcomputer , peripheral circuits, and IPM driver circuit and, as well as DC 35V, are produced ell as DC 35V, are produced ell as DC 35V by switching power circuit.
Page 51 • The voltage specification of the power circuit is as follo wer circuit is as follo wer circuit is as f <Check points> Output Voltage Main load Measuring points Potential failure modes spec. – LD301 blinks 3 or 4 J25 (“12V” display) 11-13V MAIN P.W.B.
Page 52 6. Peripheral circuits of microcomputer Fig. 6-1 shows the microcomputer and its peripheral circuits, Table 6-1 shows the basic operation of each circuit block, and Fig. 6-2 shows the system configuration. IPM (Intelligent Power Module) DC voltage approx. DC 235 V Ｒ００３ Detection resistor Ｒ...
Page 53 5V, 12V 〜 Reset voltage ◯ ◯ ◯ ＋ Reset circuit approx. DC 235 V Chopper Drive signal signal DC voltage Compressor Drive circuit Dividing resistor motor Input current Peak current Ip signal DC current Current amplifier cutoff circuit circuit ◯...
Page 54 6-2. Overload control circuit (OVL control circuit) Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state, in order to protect the compressor, electronic components and power breaker.
Page 55 IP M ( In te l l i g e n t P o we r M o d u l e ) DC voltage approx. DC 235 V Ｒ００３ D e t e ct i o n r e si s t o r Ｒ...
Page 56 R003,R004,R608,R613, detect the DC voltage at the power circuit. The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high. (Since the load level is indicated by the DC voltage multiplied by DC current, R247, R248, R249 are provided to perform the same overload judgement even when the voltage varies.) DC voltage : Low DC current : High...
Page 57 6-3. Reset Circuit R287 D208 Microcomputer RESET OUT. − R252 RESET C204 IC5(1/2) R288 0V 0V 0V 0V Fig. 6-10 The reset circuit initializes the microcomputer program when Power is “ON” from “ON” from “ON” “OFF”. Low voltage at pin 7 resets the microcomputer, and HI activates the microcomputer. Fig.
Page 58 6-4. Temperature Detection Circuit Main P.W.B. O.H. thermistor R304 C304 R301 DEF. thermistor Microcomputer AX-8V10 R305 C303 R302 Outdoor temperature thermistor CN10 R306 Outdoor temperature C302 R303 Fig. 6-12 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
Page 59 6-5. Reversing valve control circuit In this unit, reversing valve control circuit turns ON/OFF the power to the reversing valve coil by ● opening/closing the reversing valve relay. Opening/closing of relay will differ depending on the operation condition. (In the cooling cycle, ●...
Page 60 6-6. Electric expansion valve control circuit Main P.W.B. Ｂ − １２Ｖ＋５Ｖ H Ⅰ C Ｑ４０１Ｒ４０４Ｒ４０３Ｒ４０７６４１８ＰＱ４０１５...
Page 61 6-7. Outdoor DC Fan Motor control circuit This model uses DC Fan Motor which has a controller circuit built in the Motor. This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: (Voltage range: 1.7 to 7V DC) Vsp high : Faster ;...
Page 62 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN6 and CN12 connection first. It makes Fan Motor Lock also if those connectors are in misconnection. DC Fan Motor has broken invites 1A Fuse burned.
Page 63: Service Call Q & A
SERVICE CALL Q & A MODEL RAS-E10H2 / RAC-E10H2 COOLING MODE The compressor has Check if the indoor heat If the air conditioner operates stopped suddenly during exchanger is frosted. in cooling mode when it is cooling operation. Wait for 3-4 minutes cold, the evaporator may get until it is defrosted.
Page 64 AUTO FRESH DEFROSTING Auto Fresh Defrosting is carried out : the After the ON/OFF button is pressed system checks the outdoor heat exchanger to stop heating, the outdoor unit is and defrosts it as necessary before stopping still working with the OPERATION operation.
Page 65 When the “Sleep” timer is set during (1) The temperature arrives at the preset indoor operation, temperature and the air conditioner unit is (1) The indoor fan won’t rotate. temporarily stopped. Within about 3 minutes, (No air comes from the unit) the fan starts rotation.
Page 66: Trouble Shooting
TROUBLE SHOOTING MODEL RAC-E10H2 PRECAUTIONS FOR CHECKING Power inlet WARNING Remember that voltage of 175 V is applied to the 0V line on the P.W.B. or the like as shown in the right diagram. Always keep your hands WARNING and metallic things away from the cabinet.
Page 67 DISCHARGE, PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING Caution • Voltage of about 350 • Voltage of about 350 • V V is charged between the terminal of smoothing capacitors (375µF x 2). • During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
Page 68 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS MODEL RAS-E10H2 ELEC. COVER FIXTURE SCREW FIXTURE SCREW Removing electrical parts When installing the parts, use 1. Remove the electrical parts cover. caution not to pinch any code 2. Remove the connectors from the CN1 (heat exchange between the part and cabinet.
Page 69 Other Cautions (1) Cautions concerning ICP (IC Protector) 1. Use due caution for short circuit in servicing. Short circuit will open the ICP immediately. t circuit will open the ICP immediately. t circuit will open the ICP immediately 2. When the ICP opens, remove the cause of this phenomenon and replace the ICP. If the remedy is improper, the ICP may open again.
Page 70 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS Function Name Description Self-diagnosis indication function • The “timer lamp” indicates a mode of failure detected <Indicating a failure on the indoor on the indoor or outdoor unit side by blinking unit side> frequency. frequency.
Page 71 TROUBLESHOOTING WHEN TIMER LAMP BLINKS. MODEL RAS-E10H2 Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink. SELF-DIAGNOSIS LIGHTING MODE MODEL RAS-E10H2 Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective...
Page 72 SELF-DIAGNOSIS LIGHTING MODE ＳＥＬＦ−ＤＩＡＧＮＯＳＩＳＬＩＧＨＴＩＮＧＭＯＤＥ：ＬＩＧＨＴ：：ＢＬＩＮＫ：ＯＦＦ MODEL RAC-E10H2 ＬＬＤＤＳＥＬＦ−ＤＩＡ− ３３ＤＥＴＡＩＬＳＭＡＩＮＣＨＥＣＫＰＯＩＮＴ００ＤＡＮＧＥＲ１２［１］ＤＵＲＩＮＧＯＰＥＲＡＴＩＯＮＬＤ３０３（ＲＥＤ）ＬＩＧＨＴＳ．（ＤＣ３５０Ｖ）ＮＯＲＭＡＬＣＯＭＰＲＥＳＳＯＲＮＯＴＭＡＬＦＵＮＣＴＩＯＮＯＰＥＲＡＴＩＯＮＯＰＥＲＡＴＩＯＮＣＵＴＴＨＥＰＯＷＥＲ（１）（２）ＯＶＥＲＬＯＡＤＳＥＴＳＯＵＲＣＥＡＮＤＷＡＩＴＶＡＬＵＥ（１） ...
Page 73 OUTDOOR UNIT Remove the compressor connector. LD303 MAIN P.W.B. LD302 LD301 SERVICE SWITCH • Check the drive If your first attempt With the unit set in the operating circuit (IMP) using fails, wait 3 minutes state, press the start/stop the PRD checker.
Page 74 CHECKING THE INDOOR/OUTDOOR UNIT ELECTRICALPARTS AND REFRIGERATING PARTS AND REFRIGERATING Trouble shoot according to the Is the indoor unit "timer lamp" blinking? self-diagnosis lighting mode. Open the indoor unit and check the voltage Run the unit using the following remote controller settings: between pins Nos.
Page 75 CHECKING THE INDOOR UNIT ELECTRICAL PARTS 1. Power does not come on (no operation) Is AC220-230V being generated between Is AC220-230V being generated at AC Check AC outlet and breaker, and terminals A and B on the indoor unit outlet? repair any defective part.
Page 76 2. Indoor fan does not operate (others are normal) The microcomputer fan PWM Can the fan be stopped by remote Replace the microcomputer . output (at pin 24 ) is 1 - 5V. control? Replace the fan motor . Replace the microcomputer . Perform final operation check.
Page 77 4. Check the control P.W.B. (power circuit) Is 35V or 20V being output Check to see if the connection cables are at pin 5 relative to 0V at disconnected or reversed. pin 3 of CN3? If normal, check the outdoor unit P.W.B. Is 12V or 7V being output Is ICP1 normal? at (+) relative to 0V at (-) of...
Page 78 CHECKING THE REMOTE CONTROLLER Is battery polarity correct? Install the battery in the correct polarity. Is the battery check sign + – Replace the battery. flashing? Turn on an AM radio, bring the remote control switch within 15 cm of the radio, and press the ON/OFF button.
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Page 86 (JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times...
Page 87 HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC-E10H2 1. Tur T n off the power switch. 2. Remove the electrical box cover. 3. Tur T n on the power switch 4.
Page 88 IPM (Intelligent Power Module) DIAGNOSIS Model PS21564-C Collector Circuit of 1 device Gate Emitter ３１６ＨＩＮＨＯＨＯＨＩＮＨＩＮＨＯＨＳＨＳ１２ＨＳ１...
Page 89 Diagnosis procedure for power module using multimeter [Inverter section] Set the multimeter to resistance range of × 100. If × 100 is not provided, measure with the range of × 1 to × 100. If the pointer does not swing when the following continuity check is performed, it is normal. (When a digital multimeter is used, + and - terminals will be reversed, since the orientation of built-in battery is inverted.) Note:...
Page 90: Procedure For Disassembly And Reassembly
Procedure for Disassembly and Reassembly 〈INDOOR UNIT〉 MODEL RAS-E10H2 1. Front Panel 3. Control P.W. P.W. P. B. and Indicating P.W.B. (1)Pull up the washable panel by holding it at both (1)Remove each connector from the lead wire. lower sides with both hands.
Page 91 4. Tangential air flow fan and fan motor 4. Tangential air flow fan and fan motor 4. T (1) Remove two screws locking the drain pan. (5) Remove the electrical box fixing screws and GND wire fixing (2) Press to lower the hook at the center of theunit a little and pull the screw.
Page 92: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAS-E10H2 15 16 - 96 -...
Page 93 INDOOR UNIT PARTS NO. Q'TY PARTS NAME RAS-E10H2 HWRAS-25YH5 901 CABINET HWRAS-25YH5 902 VERTICAL AIR DEFLECTOR-L HWRAS-25YH5 903 VERTICAL AIR DEFLECTOR-R HWRAS-25YH5 904 FAN MOTOR 25W 1.1kg HWWSI425 TANGENTIAL AIR FLOW FAN HWRAS-25YH4 908 FAN SUPPORT ASSEMBLY HWRAS-25YH4 909 FAN COVER...
Page 94 OUTDOOR UNIT MODEL: RAC-E10H2 - 98 -...
Page 95 OUTDOOR UNIT PARTS No. Q'TY PARTS NAME RAC-E10H2 HWRAC-E10H2 BASE HWRAC-E10H2 COMPRESSOR 800W 8.0kg HWRAC-25YH4 COMPRESSOR RUBBER HWRAC-25YH4 PUSH NUT HWRAC-E10H2 CONDENSER HWRAC-E10H2 REVERSING VALVE (WITH COIL) HWRAC-E10H2 SERVICE VALVE ASSEMBLY HWRAC-E10H2 ELECTRIC EXPANSION VALVE HWRAC-E10H2 SOUND PROOF COVER ASSEMBLY HWRAC-E10H2 O.L.R COVER HWRAC-E10H2...
Page 96 AW NO. 0015E RAS-E10H2 / RAC-E10H2 Printed in Japan (TSK)

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