No.OC297 REVISED EDITION-E TECHNICAL & SERVICE MANUAL Indoor unit Revision: [Model names] [Service Ref.] • “12. PARTS LIST” has been modified. PLA-RP1.6AA.UK PLA-RP1.6AA PLA-RP2AA.UK Note: PLA-RP2AA • This manual does not cover PLA-RP2.5AA.UK outdoor units. When serving PLA-RP2.5AA them, please refer to the service PLA-RP3AA.UK...
PU-P5YGAA.UK and PU-P5YGAA .UK. PLA-RP5AA 2. Corresponding to the addition of connectable outdoor unit, the setting of SW2 (Capacity setting) on the indoor controller board have also changed. PLA-RP5AA.UK PLA-RP5AA REVISED EDITION-B • PLA-RP1.6AA.UK, PLA-RP2AA.UK and PLA-RP2.5AA.UK are added in REVISED EDITION-B.
SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to charge the system. The old refrigerant and lubricant in the existing piping If gas refrigerant is used to seal the system, the composition contains a large amount of chlorine which may cause the of the refrigerant in the cylinder will change and performance lubricant deterioration of the new unit.
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[3] Service tools Use the below service tools as exclusive tools for R407C refrigerant. Tool name Specifications Gauge manifold ·Only for R407C. ·Use the existing fitting SPECIFICATIONS. (UNF7/16) ·Use high-tension side pressure of 3.43MPa·G or over. Charge hose ·Only for R407C. ·Use pressure performance of 5.10MPa·G or over.
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CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings.
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Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Specifications Gauge manifold ·Only for R410A ·Use the existing fitting specifications . (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·Only for R410A ·Use pressure performance of 5.09MPa·G or over.
PART NAMES AND FUNCTIONS Indoor Unit Filter Removes dust and pollutants from intake air Horizontal Air Outlet Sets airflow of horizontal automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.
Display In this display example on the bot- CENTRALLY CLOCK display tom left, a condition where all dis- CONTROLLED display play lamps light is shown for expla- The current time , start time and stop time can be displayed in ten second nation purposes although this differs This indicates when the unit is con- intervals by pressing the time switch...
Wireless remote controller display CHECK TEST RUN CHECK&TEST RUN display indicates that the unit is being checked or test-run. display MODEL SELECT Blinks when model is selected. display Lights up while transmission to the indoor unit is mode using switches. display SET TEMP.
SPECIFICATIONS Heat pump type (1) Service Ref. PLA-RP1.6AA.UK Item Function Cooling Heating Btu/h 12,300 14,000 Capacity 3,600(1,600~4,500) 4,100(1,600~5,200) Total input 1.07 1.12 Service Ref. PLA-RP1.6AA.UK Single phase, 50Hz, 220-230-240V Power supply (phase, cycle, voltage) Input 0.16 0.16 Running current 0.79 0.79...
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Service Ref. PLA-RP2.5AA.UK Item Function Cooling Heating Btu/h 20,500 23,900 Capacity 6,000 (2,700~6,700) 7,000 (2,800~8,200) Total input 1.65 1.85 Service Ref. PLA-RP2.5AA.UK Single phase, 50Hz, 220-230-240V Power supply (phase, cycle, voltage) Input 0.16 0.16 Running current 0.79 0.79 Starting current External finish (Panel) Munsell 0.70Y 8.59/0.97 Heat exchanger...
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PLA-RP4AA.UK Service Ref. Item PLA-RP4AA Cooling Heating Function Btu/h 34,100 38,200 Capacity 10,000 (5,000~11,400) 11,200 (5,600~14,000) PUHZ-RP4VHA 10,000 (4,900~11,400) 11,200 (4,500~14,000) PUHZ-RP4VHA 3.03 3.39 Total input PLA-RP4AA.UK Service Ref. PLA-RP4AA Single phase, 50Hz, 220-230-240V Power supply (phase, cycle, voltage) Input 0.25 0.25 Running current...
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PLA-RP6AA.UK Service Ref. Item PLA-RP6AA Cooling Heating Function Btu/h 47,800 54,600 Capacity 14,000 (6,200~15,300) 16,000 (6,200~18,000) PUHZ-RP6VHA PUHZ-RP6VHA 14,000 (5,500~15,300) 16,000 (5,000~18,000) Total input 4.99 4.91 PLA-RP6AA.UK Service Ref. PLA-RP6AA Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.33 0.33 Running current...
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Heat pump type (2) Service Ref. PLA-RP1.6AA.UK Item Function Cooling Heating Btu/h 15,400 16,900 Capacity 4,500 4,950 Total input 1.72 1.70 Service Ref. PLA-RP1.6AA.UK Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.16 0.16 Running current 0.79 0.79...
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Service Ref. PLA-RP2.5AA.UK Item Function Cooling Heating Btu/h 22,900 24,900 Capacity 6,700 7,300 Total input 2.57 2.40 Service Ref. PLA-RP2.5AA.UK Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.16 0.16 Running current 0.79 0.79 Starting current External finish (Panel) Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil...
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PLA-RP4AA.UK Service Ref. Item PLA-RP4AA Function Cooling Heating Btu/h 32,800 35,800 Capacity 9,600 10,500 Total input 3.68 3.91 PLA-RP4AA.UK Service Ref. PLA-RP4AA Power supply (phase, cycle,voltage) Single phase, 50Hz, 220-230-240V Input 0.25 0.25 Running current 1.25 1.25 Starting current External finish (Panel) Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil...
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PLA-RP6AA.UK Service Ref. Item PLA-RP6AA Function Cooling Heating Btu/h 48,500 58,000 Capacity 14,200 17,000 Total input 5.90 6.35 PLA-RP6AA.UK Service Ref. PLA-RP6AA Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.33 0.33 Running current 1.64 1.64 Starting current External finish (Panel) Munsell 0.70Y 8.59/0.97 Heat exchanger...
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Cooling only type (3) Service Ref. PLA-RP1.6AA.UK PLA-RP2AA.UK Item Function Cooling Btu/h 15,400 19,100 Capacity 4,500 5,600 Total input 1.72 2.53 PLA-RP1.6AA.UK PLA-RP2AA.UK Service Ref. Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.16 0.16 Running current 0.79 0.79...
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Service Ref. PLA-RP3AA.UK PLA-RP4AA.UK Item PLA-RP3AA PLA-RP4AA Function Cooling Btu/h 26,300 32,800 Capacity 7,700 9,600 Total input 3.42 3.68 PLA-RP3AA.UK PLA-RP4AA.UK Service Ref. PLA-RP3AA PLA-RP4AA Power supply (phase, cycle, voltage) Single phase, 50Hz, 220-230-240V Input 0.16 0.25 Running current 0.79 1.25 Starting current External finish (Panel)
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6-2. PERFORMANCE CURVE PLA-RP•AA.UK PLA-RP•AA .UK / PUHZ-RP•VHA PUHZ-RP•VHA Cooling performance curve(50Hz) Heating performance curve(50Hz) Correcting the capacity line influenced by frosting Not correcting the capacity line influenced by frosting INDOOR INDOOR In some cases, heating operation W.B.(°C) cannot be conducted with the maximum D.B.(°C) frequency in the area below the slanting line.
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Cooling only type (3) PLA-RP1.6AA.UK PLA-RP2AA.UK Service Ref. PLA-RP2.5AA.UK Mode Cooling Cooling Cooling Capacity 4,500 5,600 6,700 Input 1.72 2.53 2.57 PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK Indoor unit Service Ref. Phase , Hz 1 , 50 1 , 50 1 , 50...
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The unit of pressure has been changed to MPa based on international SI system. The conversion factor is : 1(MPa)=10.2(kgf/f 6-5. OUTLET AIR SPEED AND COVERAGE RANGE PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA Air flow /min.
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6-6. NOISE CRITERION CURVES NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High PLA-RP1.6AA.UK PLA-RP2AA.UK Medium1 Medium1 PLA-RP2.5AA.UK Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20...
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NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High PLA-RP5AA.UK PLA-RP6AA.UK Medium1 Medium1 PLA-RP5AA PLA-RP6AA Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000...
WIRING DIAGRAM PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK PLA-RP3AA .UK PLA-RP4AA .UK PLA-RP5AA .UK PLA-RP6AA [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR POWER BOARD VANE MOTOR WIRELESS REMOTE CONTROLLER BOARD FUSE (4A) RECEIVING UNIT DRAIN PUMP VARISTOR DRAIN SENSOR...
TROUBLESHOOTING 10-1. TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are sum- marised in the table below.
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Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. 10-2. SELF-DIAGNOSIS ACTION TABLE Error Code Meaning of error code and detection method Judgment and action Case Abnormality of room temperature 1 Defective thermistor 1–3 Check resistance value of thermistor.
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Error Code Meaning of error code and detection method Judgment and action Case Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
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Error Code Meaning of error code and detection method Judgment and action Case Abnormality of pipe temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. mistor / Condenser-Evaporator (TH5) For characteristics, refer to (P1) above. characteristics 2 Check contact failure of connector (CN29) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
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10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Factor Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Power supply of 220~240V is not supplied to outdoor 1 Check the voltage of outdoor power is off.
10-4. EMERGENCY OPERATION 10-4-1. When wireless remote controller troubles or its battery is exhausted 1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor unit. 2. To start operation • Cooling Operation·······Press (Cooling) switch.
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10-5. HOW TO CHECK THE PARTS PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA.UK PLA-RP3AA PLA-RP4AA.UK PLA-RP4AA PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH1) (Surrounding temperature 10:~30:) Pipe temperature...
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<Thermistor Characteristic graph> Room temperature thermistor(TH1) Thermistor for < Thermistor for lower temperature > Pipe temperature thermistor/liquid(TH2) lower temperature Condenser/evaporator temperature thermistor(TH5) Thermistor R =15k' ± 3% Fixed number of B=3480K ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k' 6.3k' 5.4k' 4.3k' 3.0k'...
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10-6. TEST POINT DIAGRAM 10-6-1. Power board PLA-RP1.6AA.UK PLA-RP2AA.UK CN2S PLA-RP2.5AA.UK Connect to the indoor controller – PLA-RP3AA.UK PLA-RP3AA board (CN2D) PLA-RP4AA.UK PLA-RP4AA (12~16V DC) PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA CN02 Connect to the indoor controller board (CN03) Between 1 and 2 0~24V DC –...
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10-6-2. Controller board PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA.UK PLA-RP3AA PLA-RP4AA.UK PLA-RP4AA PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA CN22 CN90 CN2D Connect to the terminal block(TB5) CN32 Connect to the wireless Connect to the indoor (Remote controller connecting wire) Connector CN6V remote controller board...
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10-7. FUNCTIONS OF JUMPER WIRE Each function is controlled by the jumper wire on control p.c. board. For service parts, J11- J15 and J21-J24, DIP switches (SW1 and SW2) are equipped with jumper wire. (Marks in the table below) Jumper wire ( : Short : Open) DIP switch...
DISASSEMBLY PROCEDURE PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK Be careful on removing heavy parts. PLA-RP3AA .UK PLA-RP4AA .UK PLA-RP5AA .UK PLA-RP6AA OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille toward the arrow 1 to open the air intake grille.
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OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5. Removing the fan motor Photo 4 (1) Remove the fan guard.(See photo 1) Fan motor (2) Remove the bell mouth.(See photo 2) (3) Remove the electrical box.(See photo 3) (4) Remove the turbo fan nut. (5) Pull out the turbo fan.
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OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 9. Removing the drain pump and drain sensor Photo 8 (1) Remove the panel. (See photo 6) (2) Remove the fan guard. (See photo 1) (3) Remove the bell mouth. (See photo 2) (4) Remove the electrical box. (See photo 3) (5) Remove the drain pan.
PARTS LIST PANEL PARTS PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK GEAR PLA-RP3AA.UK PLA-RP3AA GEAR PLA-RP4AA.UK PLA-RP4AA (VANE) PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA VANE BUSH STEPPING MOTOR RECEIVER CHECK TEST RUN MODEL SELECT ˚C AMPM AMPM NOT AVAILABLE CENTRALLY CONTROLLED 1Hr. ON/OFF TEMP ON OFF ˚C...
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FUNCTIONAL PARTS PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK MOTOR CAP SPL WASHER CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. Parts Name PLA-RP1.6AA.UK (Drawing Diagram mended cation PLA-RP2AA.UK PLA-RP2.5AA.UK Symbol Q'ty No.) Unit Amount...
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FUNCTIONAL PARTS PLA-RP3AA.UK PLA-RP3AA PLA-RP4AA.UK PLA-RP4AA MOTOR CAP SPL WASHER CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR FLARE NUT (Only R410A) Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. Parts Name (Drawing PLA-RP3AA.UK PLA-RP4AA.UK Diagram mended cation Symbol Q'ty No.) Unit...
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FUNCTIONAL PARTS PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA MOTOR CAP SPL WASHER CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR FLARE NUT (Only R410A) Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. Parts Name (Drawing PLA-RP5AA.UK PLA-RP6AA.UK Diagram mended cation Symbol Q'ty No.) Unit...
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FUNCTIONAL PARTS PLA-RP1.6AA.UK PLA-RP2AA.UK PLA-RP2.5AA.UK DRAIN PLUG DRAIN PLUG CAPACITOR TERMINAL BLOCK TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR Part numbers that is circled is not shown in the figure. Q'ty / set Price Wiring Recom- Remarks PLA-RP1.6AA.UK Specification Parts No. Parts Name...
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FUNCTIONAL PARTS PLA-RP3AA.UK PLA-RP3AA PLA-RP4AA.UK PLA-RP4AA DRAIN PLUG DRAIN PLUG CAPACITOR TERMINAL BLOCK TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR Part numbers that is circled is not shown in Q'ty / set Price Remarks Wiring Recom- Specifi- (Drawing Parts No. Parts Name PLA-RP3AA.UK PLA-RP4AA.UK Diagram...
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FUNCTIONAL PARTS PLA-RP5AA.UK PLA-RP5AA PLA-RP6AA.UK PLA-RP6AA DRAIN PLUG DRAIN PLUG CAPACITOR TERMINAL BLOCK TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR Part numbers that is circled is not shown in the figure. Q'ty / set Price Remarks Wiring Recom- Specifi- (Drawing Parts No. Parts Name Diagram PLA-RP5AA.UK...
OPTIONAL PARTS 13-1. PROGRAM TIMER Part No. PAC-YT32PTA 13-1-1. Names and functions <PAC-YT32PTA> MODE A MODE B M O NIT O R SET BACK SET/MONITOR MODE A/B/OFF SET BACK DAILY TIMER MODE A/B WEEKLY SETTING ON/OFF/SET BACK CLOCK TODAY PAC-YT32PTA DAILY SETTING A SET/MONITOR DISPLAY: 1 SET/MONITOR Button...
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13-2. MULTI-FUNCTIONAL CASEMENT Part No. PAC-SG03TM-E PLA-RP1.6,2,2.5,3,4,5,6AA.UK Applied Service Ref. PLA-RP3,4,5,6AA 13-3. HIGH-EFFICIENCY FILTER ELEMENT (13-2. MULTI-FUNCTIONAL CASEMENT is needed.) Part No. PAC-SG01KF PLA-RP1.6,2,2.5,3,4,5,6AA.UK Applied Service Ref. PLA-RP3,4,5,6AA 13-4. GRILLE + WIRELESS REMOTE CONTROLLER Part No. PLP-6AALM PLA-RP1.6,2,2.5,3,4,5,6AA.UK Applied Service Ref. PLA-RP3,4,5,6AA 13-5.
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HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3 MARUNOUCHI CHIYODA-KU , TOKYO 100-8310 , JAPAN cCopyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in May 2005 No. OC297 REVISED EDITION-E PDF 8 Distributed in Feb. 2005 No. OC297 REVISED EDITION-D PDF 8 Distributed in Jul.