Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model names]
PLA-RP100AA2
PLA-RP125AA2
PLA-RP140AA2
Model name
indication
INDOOR UNIT
ON/OFF
TEMP
WIRELESS REMOTE
CONTROLLER
[Service Ref.]
PLA-RP100AA2.UK
PLA-RP125AA2.UK
PLA-RP140AA2.UK
TEMP.
ON/OFF
WIRED REMOTE
CONTROLLER
REVISED EDITION-A
Revision:
• RoHS PARTS LIST is added.
• Some descriptions have
• Please void OC357.
Note:
• This manual describes only
• RoHS compliant products
• For servicing of RoHS com-
CONTENTS
1. REFERENCE MANUAL ······································2
2. SAFETY PRECAUTION···································2
3. PART NAMES AND FUNCTIONS ···················6
4. SPECIFICATIONS ············································9
5. NOISE CRITERION CURVES ························10
6. OUTLINES AND DIMENSIONS ·····················11
7. WIRING DIAGRAM············································12
8. REFRIGERANT SYSTEM DIAGRAM ··················13
9. TROUBLESHOOTING ···································14
10. DISASSEMBLY PROCEDURE ······················31
11. PARTS LIST ···················································34
12. RoHS PARTS LIST ········································37
July 2006
No. OC357
been modified.
service data of the indoor
units.
have <G> mark on the spec
name plate.
pliant products, refer to the
RoHS Parts List.
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric Mr.Slim PLA-RP100AA2
Summary of Contents for Mitsubishi Electric Mr.Slim PLA-RP100AA2
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Page 1: Table Of Contents
SPLIT-TYPE, AIR CONDITIONERS July 2006 No. OC357 REVISED EDITION-A SERVICE MANUAL Indoor unit [Model names] [Service Ref.] Revision: PLA-RP100AA2.UK PLA-RP100AA2 • RoHS PARTS LIST is added. • Some descriptions have PLA-RP125AA2.UK been modified. PLA-RP125AA2 PLA-RP140AA2.UK • Please void OC357. PLA-RP140AA2 Note: •... -
Page 2: Reference Manual
REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Service Manual No. Service Ref. PUHZ-RP100/125/140VHA OC334 PUHZ-RP100/125/140YHA PUHZ-RP200/250YHA OC338 PU(H)-P·VGAA.UK OC336 PU(H)-P·YGAA.UK SUZ-KA·VA.TH OC322 PUHZ-RP100/125/140VHA2 OC374 PUHZ-RP100/125/140YHA2 PU(H)-P100VHA.UK OC379 PU(H)-P100/125/140YHA.UK PUHZ-P100/125/140VHA.UK OC359 1-2. TECHNICAL DATA BOOK Manual No. Series (Outdoor unit) PUHZ-RP·VHA(-A) OCS01 PUHZ-RP·YHA(-A) PU(H)-P·VGAA.UK... - Page 3 [1] Cautions for service ·After recovering the all refrigerant in the unit, proceed to working. ·Do not release refrigerant in the air. ·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder.
- Page 4 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.
- Page 5 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.
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Page 6: Part Names And Functions
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. - Page 7 Display “Sensor” indication Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit. “Locked”...
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Page 8: Wireless Remote Controller
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. -
Page 9: Specifications
SPECIFICATIONS Service Ref. PLA-RP100AA2.UK Cooling Heating Mode Power supply(phase, cycle, voltage) Single phase, 50Hz, 230V Input 0.18 0.18 Running current 0.92 0.92 External finish (Panel) Munsell 0.70Y 8.59/0.97 Heat exchanger Plate fin coil Fan(drive) o No. Turbo fan (direct) o 1 Fan motor output 0.120... -
Page 10: Noise Criterion Curves
NOISE CRITERION CURVES PLA-RP100AA2.UK PLA-RP125AA2.UK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 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... -
Page 11: Outlines And Dimensions
OUTLINES AND DIMENSIONS INDOOR UNIT Unit : mm PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK Ceiling hole 20 - 45 860 - 910 20 - 45 Branch duct hole Fresh air intake (Cut out hole) Suspension bolt pitch 90 100 100 90 Branch duct hole... -
Page 12: Wiring Diagram
WIRING DIAGRAM PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR POWER BOARD VANE MOTOR WIRELESS REMOTE CONTROLLER BOARD FUSE(T5AL250V) FUSE DEW PREVENTION HEATER RECEIVING UNIT VARISTOR DRAIN-UP MACHINE BUZZER POWER MODULE DRAIN SENSOR LED1 LED(RUN INDICATOR) INDOOR CONTROLLER BOARD... -
Page 13: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ Eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 Pipe temperature(Liquid) Thermistor TH1 (Room temperature) -
Page 14: Troubleshooting
TROUBLESHOOTING 9-1. 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 or controller board of outdoor unit. Actions to be taken for service and the inferior phenomenon reoccurrence at field are summarized in the table below. Check the contents below before investigating details. - Page 15 9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
- Page 16 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
- Page 17 • On wireless remote controller 2The continuous buzzer sounds from receiving section of indoor unit. 3Blink of operation lamp • On wired remote controller 1Check code displayed in the LCD. • If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause. Symptom Cause Wired remote controller...
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Page 18: Self-Diagnosis Action Table
Note: Refer to the manual of outdoor unit for the details of display 9-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Error Code Meaning of error code and detection method Countermeasure Cause Abnormality of room temperature 1 Defective thermistor 1–3 Check resistance value of thermistor. - Page 19 Error Code Meaning of error code and detection method Countermeasure Cause 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.
- Page 20 Error Code Meaning of error code and detection method Countermeasure Cause 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.
- Page 21 Error Code Meaning of error code and detection method Countermeasure Cause ∗ Check LED display on the outdoor control cir- 1 Contact failure, short circuit or, Indoor/outdoor unit communication error (Signal receiving error) cuit board. (Connect A-control service tool, mis-wiring (converse wiring) of 1 Abnormal if indoor controller board PAC-SK52ST.) indoor/outdoor unit connecting...
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Page 22: Troubleshooting By Inferior Phenomena
9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off. - Page 23 Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (2)LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire Connection failure of indoor/outdoor unit connecting for connection failure.
- Page 24 Role of each component when motor is driven. PWM output 3 phase AC (voltage and Indoor/outdoor connecting line frequency are changeable.) 220-240V AC Fan motor Indoor power DC brushless board. (fan- control circuit) Position sensor circuit Rotational speed detection signal (hall element) 5V DC pulse Fan drive speed instruction Fan rotational speed data...
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Page 25: Emergency Operation
9-5. EMERGENCY OPERATION 9-5-1. 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. - Page 26 9-6. HOW TO CHECK THE PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH1) (Surrounding temperature 10:~30:) Pipe temperature Normal Abnormal thermistor/liquid(TH2) (Refer to the thermistor) 4.3k"~9.6k"...
- Page 27 <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=3480 ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k' 6.3k' 5.4k' 4.3k' 3.0k'...
- Page 28 9-7.TEST POINT DIAGRAM 9-7-1. Power board PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK Connect to the indoor controller Sensor input for detecting position of motor board (CN33) Between 1 and 5 (Serial signal I/O) Between 1 and 2 Between 2 and 5 5V DC pulse...
- Page 29 9-7-2. Indoor Controller board PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK CN22 Connect to the terminal LED1 CN2D LED3 LED2 block (TB5) Power supply Connect to the indoor power Transmission Power supply (Remote controller con- (I.B) board (CN2S) (Indoor/outdoor) (R.B) necting wire) (12.6~15.4V DC) (10.4~14.6V DC)
- Page 30 1 2 3 4 5 PLA-RP. AA2 settings MODELS Manufacture/Service Capacity 1 2 3 4 5 settings PLA-RP100AA2 1 2 3 4 5 PLA-RP125AA2 1 2 3 4 5 PLA-RP140AA2 <Settings at time of factory shipment> Wireless remote controller: 0 Control PCB setting...
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Page 31: Disassembly Procedure
DISASSEMBLY PROCEDURE PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK Be careful on removing heavy parts. 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. - Page 32 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5 Removing the fan motor Photo 4 (1) Remove the fan guard.(See photo 1) (2) Remove the bell mouth.(See photo 1) (3) Remove the electrical box.(See photo 2) Fan motor (4) Remove the turbo fan nut. (5) Pull out the turbo fan.
- Page 33 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) Cut the drain hose band with scissors and pull out the drain hose from the drain pump.
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Page 34: Parts List
PARTS LIST (non-RoHS compliant) PANEL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK GEAR GEAR (VANE) VANE BUSH STEPPING MOTOR RECEIVER CHECK TEST RUN MODEL SELECT ˚C AMPM AMPM NOT AVAILABLE ON/OFF TEMP TEMP. ON/OFF Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. - Page 35 FUNCTIONAL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK SPL WASHER CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR FLARE NUT Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. Parts Name (Drawing PLA-RP•AA2.UK Diagram mended cation Symbol Q'ty No.) Unit Amount 125,140 S70 K01 687...
- Page 36 FUNCTIONAL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK DRAIN PLUG DRAIN PLUG TERMINAL BLOCK TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR Part numbers that are circled are not shown in the figure. Price Q'ty / set Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.)
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Page 37: Rohs Parts List
RoHS PARTS LIST PANEL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK GEAR GEAR (VANE) VANE BUSH STEPPING MOTOR RECEIVER CHECK TEST RUN MODEL SELECT ˚C AMPM AMPM NOT AVAILABLE ON/OFF TEMP TEMP. ON/OFF Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. - Page 38 FUNCTIONAL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK SPL WASHER CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR FLARE NUT Q'ty / set Remarks Price Wiring Recom- Specifi- Parts No. Parts Name PLA-RP•AA2.UK (Drawing Diagram mended cation Symbol Q'ty No.) Unit Amount 125,140 S70 K01 687...
- Page 39 FUNCTIONAL PARTS PLA-RP100AA2.UK PLA-RP125AA2.UK PLA-RP140AA2.UK DRAIN PLUG DRAIN PLUG TERMINAL BLOCK TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR Part numbers that are circled are not shown in the figure. Price Q'ty / set Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended PLA-RP100 ·...
- Page 40 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN New publication, effective Jul. 2006. CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Specifications subject to change without notice. Distributed in Jul. 2006 No.OC357 REVISED EDITION-A PDF 7 Distributed in Jan. 2006 No.OC357 PDF 8...