Mitsubishi Electric PLA-RP35EA Service Manual

Mr.slim split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS

SERVICE MANUAL

Indoor unit
[Model Name]
[Service Ref.]
PLA-RP35EA.UK
PLA-RP35EA
PLA-RP50EA.UK
PLA-RP50EA
PLA-RP60EA.UK
PLA-RP60EA
PLA-RP71EA.UK
PLA-RP71EA
PLA-RP100EA.UK
PLA-RP100EA
PLA-RP125EA.UK
PLA-RP125EA
PLA-RP140EA.UK
PLA-RP140EA
Grille model
[Model Name]
[Service Ref.]
PLP-6EA
PLP-6EA
PLP-6EAE
PLP-6EAE
PLP-6EAL
PLP-6EAL
PLP-6EALE
PLP-6EALE
PLP-6EAJ
PLP-6EAJ
PLP-6EAJE
PLP-6EAJE
PLP-6EALM
PLP-6EALM
PLP-6EALME
PLP-6EALME
Model name
indication for
INDOOR UNIT
WIRELESS REMOTE
CONTROLLER
(Option)
PLP-6EAR1
PLP-6EAER1
PLP-6EALR1
PLP-6EALER1
Model name
indication for GRILLE
WIRED REMOTE
CONTROLLER
(Option)
Revision:
• Added the model names of
GRILLE to the cover page in
REVISED EDITION-A.
• Some other descriptions have
been also modified.
OCH626 is void.
Notes:
• This manual describes ser-
• RoHS compliant products
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 4
4. SPECIFICATIONS ............................................ 9
5. NOISE CRITERION CURVES ......................... 12
6. OUTLINES AND DIMENSIONS ...................... 14
7. WIRING DIAGRAM ......................................... 15
9. TROUBLESHOOTING .................................... 17
10. SPECIAL FUNCTION ..................................... 32
11. DISASSEMBLY PROCEDURE ....................... 38
PARTS CATALOG (OCB626)
November 2016
No. OCH626
REVISED EDITION-A
vice data of the indoor units
only.
have mark on the spec
name plate.

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  Summary of Contents for Mitsubishi Electric PLA-RP35EA

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS November 2016 No. OCH626 REVISED EDITION-A SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] PLA-RP35EA.UK PLA-RP35EA Revision: PLA-RP50EA.UK • Added the model names of PLA-RP50EA GRILLE to the cover page in PLA-RP60EA.UK PLA-RP60EA REVISED EDITION-A.
  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No. PUHZ-ZRP35/50VKA2 PUHZ-ZRP35/50VKA2(-ER/ET) OCH635/OCB635 PUHZ-ZRP60/71VHA2 PUHZ-ZRP60/71VHA2(-ER/ET) PUHZ-ZRP100/125/140VKA3 PUHZ-ZRP100/125/140/VKA3.UK PUHZ-ZRP100/125/140YKA3 PUHZ-ZRP100/125/140/YKA3.UK OCH645/OCB645 PUHZ-ZRP200/250YKA2 PUHZ-ZRP200/250YKA2.UK SUZ-KA35VA6.TH(-ER/ET) SUZ-KA35VA6 TCH004 SUZ-KA50VA6.TH(-ER/ET) SUZ-KA50VA6 TCB004 SUZ-KA60VA6.TH(-ER/ET) SUZ-KA60VA6 SUZ-KA71VA6 SUZ-KA71VA6.TH(-ER/ET) PUHZ-P100VHA5 PUHZ-P100VHA5.UK PUHZ-P100YHA3 PUHZ-P100YHA3.UK PUHZ-P125VHA4 PUHZ-P125VHA4.UK OCH646/OCB646 PUHZ-P125YHA2...
  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve.
  • Page 4: Parts Names And Functions

    Unit Electronic weighing scale [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name 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 ·...
  • Page 5 3-2. WIRELESS REMOTE CONTROLLER (Option) Transmission area Not available Remote controller display Battery replacement indicator Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/down airflow direction) i-see button Timer ON button Menu button Timer OFF button SET/SEND button...
  • Page 6: Basic Mode

    3-3. Wired remote controller (Option) PAR-32MAA The functions which can be used are restricted according to each model. The main display can be displayed in 2 different modes: "Full" and "Basic." Display The initial setting is "Full." 1 Operation mode Indoor unit operation mode appears here.
  • Page 7 Menu structure Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. Main menu SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-OFF timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
  • Page 8: High

    Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. • Select a desired vane setting from 5 different settings. (Lossnay) Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
  • Page 9: Specifications

    SPECIFICATIONS Service Ref. PLA-RP35EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.03 0.03 Running current 0.20 0.18 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.050...
  • Page 10 Service Ref. PLA-RP71EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.04 0.04 Running current 0.27 0.25 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.05 K/min...
  • Page 11 Service Ref. PLA-RP140EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.10 0.10 Running current 0.66 0.64 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan(drive) o No. Turbo fan (direct) o 1 Fan motor output 0.120 K/min...
  • Page 12: Noise Criterion Curves

    NOISE CRITERION CURVES PLA-RP35EA.UK PLA-RP50EA.UK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High PLA-RP60EA.UK 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...
  • Page 13 PLA-RP125EA.UK PLA-RP140EA.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 CONTINUOUS NOISE NOISE 8000 1000 2000...
  • Page 14: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.UK Unit: mm OCH626A...
  • Page 15: Wiring Diagram

    WIRING DIAGRAM PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.UK [LEGEND] <Table 1> SW1 (MODEL SELECTION) MODELS Manufacture/Service SYMBOL NAME SYMBOL NAME 1 2 3 4 5 6 INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR PLA- RP.EA CN2L CONNECTOR (LOSSNAY) CONNECTING LINE)
  • Page 16: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.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)
  • Page 17: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller or controller board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below.
  • Page 18: High

    Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep n th 1 st 2 nd 3 rd 1 st 2 nd · · · Repeated OPERATION INDICATOR lamp blinking pattern...
  • Page 19 • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller • For about 2 minutes after power-on,operation of the For about 2 minutes after power-on PLEASE WAIT remote controller is not possible due to system startup.
  • Page 20 Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. 9-3. SELF-DIAGNOSIS ACTION TABLE Please refer to the outdoor unit's service manual for the details. Abnormal point and detection method Countermeasure Check code...
  • Page 21 Abnormal point and detection method Countermeasure Check code Cause 1 Malfunction of drain pump 1 Check if drain pump works. Drain pump lock protection operation 2 Clogged drain pump 1 Error postponement, if drain pump stops 2 Check if drain pump works. 3 Contact failure of connector for 5 seconds continuously while drain 3 Check contact failure of connector CNP...
  • Page 22 Abnormal point and detection method Countermeasure Check code Cause 1 Defective thermistor Pipe temperature thermistor/ characteristics 1–3 Check resistance value of thermistor. Condenser-Evaporator (TH5) For characteristics, refer to (P1) above. 1 The unit is in 3-minute resume protec- 2 Contact failure of connector 2 Check contact failure of connector (CN44) tion mode if short/open of thermistor is (CN44) on the indoor controller...
  • Page 23 Abnormal point and detection method Countermeasure Check code Cause 1 Contact failure, short circuit or, Note: Check LED display on the outdoor control Indoor/outdoor unit communication circuit board. (Connect A-control service miswiring (converse wiring) of error (Signal receiving error) 1 Abnormal if indoor controller board tool, PAC-SK52ST.) indoor/outdoor unit connecting cannot receive any signal normally for 6...
  • Page 24 Abnormal point and detection method Countermeasure Check code Cause 12 Refer to "9-6-2. DC Fan Motor (FAN Fan motor trouble 1 Defective fan motor 2 Defective indoor controller board MOTOR/INDOOR CONTROLLER BOARD)". Abnormal refrigerant circuit 1 Abnormal operation of 4-way 1 When this error occurs, be sure to replace During Cooling, Dry, or Auto Cooling the 4-way valve.
  • Page 25 9-4. TROUBLESHOOTING OF PROBLEMS Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure • When LED1 on indoor controller board is also off. (1) LED2 on indoor controller board 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off.
  • Page 26 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire (2) LED2 on indoor controller board Connection failure of indoor/outdoor unit connecting for connection failure.
  • Page 27: Emergency Operation

    9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
  • Page 28 9-6. HOW TO CHECK THE PARTS PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.UK Parts name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (TH1) (Parts temperature 10 to 30°C) Pipe temperature Abnormal Normal thermistor/liquid (TH2) Opened or short-circuited 4.3 to 9.6 k"...
  • Page 29 9-6-1. Thermistor <Thermistor Characteristic Graph> < Thermistor for lower temperature > Room temperature thermistor (TH1) Thermistor for 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 15 k"...
  • Page 30 9-7. TEST POINT DIAGRAM Indoor controller board PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.UK CN5Y i-see Sensor motor (MT) Vane motor (MV) Connect to wired remote controller 12 V pulse output 12 V pulse output 10.4-14.6 V DC Model selection...
  • Page 31 MODEL SETTING Model 1 2 3 4 5 settings PLA-RP•EA MODELS SETTING 1 2 3 4 5 PLA-RP35EA 1 2 3 4 5 PLA-RP50EA 1 2 3 4 5 PLA-RP60EA Capacity settings 1 2 3 4 5 PLA-RP71EA 1 2 3 4 5...
  • Page 32: Special Function

    SPECIAL FUNCTION 10-1. OPERATION (AUTOMATIC FILTER ELEVATION GRILLE: PLP-6EAJ) (1) Normal operation String 1b 1 UP/DOWN UP/DOWN UP/DOWN Air intake grille is raised/lowered by Machine 1 Machine 2 commands of UP and DOWN. Air intake grille does not move under the state of no-load detection or obstacle detection.
  • Page 33 10-2. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 10-2-1 DIP SW LED4 LED2 [ LEGEND ] SYMBOL NAME [EMERGENCY OPERATION] ELEVATION PANEL CONTROLLER BOARD 1. If the wireless remote controller for ELEVATION PANEL is faulty or lost, operation LED ORANGE LED2 (INTAKE GRILLE CONDITION (See table *1)) will be possible using the emergency up/down switch at the wireless signal receiver...
  • Page 34 10-3. TROUBLESHOOTING • Check the following points. Problem Possible Reason Corrective Action Intake grille does not function Air-conditioner is running. Stop running the air-conditioner and try again. After recovering from power failure, try again. Power failure. with operation of the remote Batteries are not inserted into the wireless remote Install or replace the battery.
  • Page 35: Main Unit

    10-4. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-4-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. Note: Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting) Refrigerant address "00"...
  • Page 36: Main Unit

    • System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20: [2nd stage cut-in function]··· Request code number "322–324" Set point = 26: When request code number is “323”. Room temp. ] Set point Room temp.
  • Page 37 (2) Rotation and back up operation PAR-3xMAA ("x" represents 0 or later) Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button. Main display: Cursor Page...
  • Page 38: Disassembly Procedure

    DISASSEMBLY PROCEDURE DISASSEMBLY PROCEDURE PLA-RP35EA.UK PLA-RP50EA.UK PLA-RP60EA.UK PLA-RP71EA.UK PLA-RP100EA.UK PLA-RP125EA.UK PLA-RP140EA.UK Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Knob Air intake grille 1. Removing the filter (1) Slide the knob of air intake grille toward the arrow to Figure 1 open the air intake grille.
  • Page 39 OPERATING PROCEDURE PHOTOS 4. Removing the room temperature thermistor (TH1) Photo 3 (1) Remove the electrical box cover. (See Photo 1 and 2) (2) Disconnect the connector CN20 (Red) from the indoor Electrical box Thermistor (TH1) controller board. Indoor controller (3) Remove the room temperature thermistor with its CN20 board...
  • Page 40 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Bell mouth fixing screws 6. Removing the electrical box (1) Remove the electrical box cover (See Photo 1 and 2) Photo 5 and the connectors (Refer to procedure 5). (2) Remove the electrical box fixing screws (M5×10: 2 screw).
  • Page 41 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 9. Removing the panel Figure 4 (1) Remove the electrical box fixing cover. (See Photo 1) Corner panel (2) Disconnect the connector for vane motor (CNV: White). Screw (Refer to procedure 5) (3) Loosen the 4 corner panel fixing screws (tapping screw ①...
  • Page 42 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 11. Removing the pipe temperature/liquid thermistor (TH2) Photo 13 and condenser/evaporator temperature thermistor (TH5) (1) Remove the drain pan (Refer to procedure 10) and loosen the 2 clamps of the coil plate. (See Photo 9) (2) Remove the coil plate (tapping screw 4×10: 2 screws).
  • Page 43 OPERATING PROCEDURE PHOTOS Do not hold this floating part Photo 15 13. Removing the float switch (FS) when lifting; Doing so will cause (1) Remove the drain pan. (Refer to procedure 10) malfunction. (2) Loosen the clamp of the drain pump. (See Photo 14) (3) Remove the float switch (tapping screw 4×10: 1 screw/1 hook).
  • Page 44 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2016 MITSUBISHI ELECTRIC CORPORATION Issued: Nov. 2016 No.OCH626 REVISED EDITION-A Published: Sep. 2016 No.OCH626 Specifications are subject to change without notice. Made in Japan...