Mitsubishi Electric MR. Slim PEAD-M50JA Service Manual
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Mitsubishi Electric MR. Slim PEAD-M50JA Service Manual

Ceiling concealed r32/r410a
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SPLIT-TYPE, HEAT PUMP
AIR CONDITIONERS
SERVICE MANUAL
Series PEAD
<indoor unit>
Models
PEAD-M35JA(L)
PEAD-M50JA(L)
PEAD-M60JA(L)
PEAD-M71JA(L)
PEAD-M100JA(L)
PEAD-M125JA(L)
PEAD-M140JA(L)
INDOOR UNIT
R32/R410A
CONTENTS
1. SAFETY PRECAUTION ····························· 2
2. PART NAMES AND FUNCTIONS ·············· 7
3. SPECIFICATION ······································· 11
5. SOUND PRESSURE LEVELS ·················· 21
6. OUTLINES & DIMENSIONS ····················· 28
7. WIRING DIAGRAM ··································· 31
9. TROUBLESHOOTING ······························ 33
10. DISASSEMBLY PROCEDURE ················· 47
2017
NOTE:
• This manual describes only
service data of the indoor
units.
TM

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS 2017 SERVICE MANUAL Series PEAD R32/R410A <indoor unit> NOTE: Models PEAD-M35JA(L) • This manual describes only service data of the indoor PEAD-M50JA(L) units. PEAD-M60JA(L) PEAD-M71JA(L) PEAD-M100JA(L) PEAD-M125JA(L) PEAD-M140JA(L) CONTENTS 1. SAFETY PRECAUTION ····························· 2 2. PART NAMES AND FUNCTIONS ·············· 7 3.

  • Page 2: Safety Precaution

    SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING In case that refrigerant type is R32, this unit uses a flammable refrigerant. (Risk of fire) If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.
  • Page 3 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 4 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 5 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 6 b) Isolate system electrically. c) Before attempting the procedure, ensure that: · mechanical handling equipment is available, if required, for handling refrigerant cylinders; · all personal protective equipment is available and being used correctly; · the recovery process is supervised at all times by a competent person; ·...

  • Page 7: Part Names And Functions

    Unit Electronic weighing scale [5] Service tools Use the below service tools as exclusive tools for R32/R410A refrigerant. Refer to the spec name plate on outdoor unit for the type of refrigerant being used. Tool name Specifications Gauge manifold · Use the existing fitting specifications. (UNF1/2) ·...
  • Page 8 • 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 9 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. 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 10 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 11: Specification

    SPECIFICATION Service Ref. PEAD-M35JA(L) Cooling Heating Mode Power supply Single phase, 50Hz, 220-240V ❇ Input 0.09 ( 0.07 ) 0.07 ❇ Running Current 0.64 ( 0.53 ) 0.53 External finish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan ×...
  • Page 12 Service Ref. PEAD-M71JA(L) Cooling Heating Mode Power supply Single phase, 50Hz, 220-240V ❇ Input 0.17 ( 0.15 ) 0.15 ❇ Running Current 1.28 ( 1.17 ) 1.17 External finish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan ×...
  • Page 13 Service Ref. PEAD-M140JA(L) Mode Cooling Heating Power supply Single phase, 50Hz, 220-240V ❇ Input 0.39 ( 0.37 ) 0.37 ❇ Running Current 2.60 ( 2.49 ) 2.49 External finish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan ×...

  • Page 14: Fan Performance And Corrected Air Flow

    FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-M35JA(L) PEAD-M35JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Rated point Limit Limit High Rated point High Middle Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-M35JA(L) PEAD-M35JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz Rated point Limit...
  • Page 15 PEAD-M50JA(L) PEAD-M50JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Limit Rated point Limit High High Rated point Middle Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-M50JA(L) PEAD-M50JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz Rated point High High...
  • Page 16 PEAD-M60JA(L) PEAD-M60JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Rated point Limit Limit High Rated point Middle High Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-M60JA(L) PEAD-M60JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz Rated point High Limit...
  • Page 17 PEAD-M71JA(L) PEAD-M71JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz High Rated point Limit Limit High Middle Rated point Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-M71JA(L) PEAD-M71JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz High Rated point Limit...
  • Page 18 PEAD-M100JA(L) PEAD-M100JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Limit High Limit Rated point Middle Rated point High Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-M100JA(L) PEAD-M100JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz High Limit Rated point...
  • Page 19 PEAD-M125JA(L) PEAD-M125JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Limit High Limit High Middle Middle Rated point Rated point Airflow rate(m /min) Airflow rate(m /min) PEAD-M125JA(L) PEAD-M125JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz High High Limit...
  • Page 20 PEAD-M140JA(L) PEAD-M140JA(L) (External static pressure 35Pa) 220-240V 50Hz (External static pressure 100Pa) 220-240V 50Hz Limit High High Limit Middle Middle Rated point Rated point Airflow rate(m /min) Airflow rate(m /min) PEAD-M140JA(L) PEAD-M140JA(L) (External static pressure 50Pa) 220-240V 50Hz (External static pressure 150Pa) 220-240V 50Hz High Limit High...

  • Page 21: Sound Pressure Levels

    SOUND PRESSURE LEVELS 5-1. Sound pressure level Ceiling concealed Aux. duct test unit Measurement location 5-2. NC curves PEAD-M35JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0...
  • Page 22 PEAD-M50JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 23 PEAD-M60JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 24 PEAD-M71JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 25 PEAD-M100JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 26 PEAD-M125JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 27 PEAD-M140JA(L) (External static pressure 35Pa) (External static pressure 100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...

  • Page 28: Outlines & Dimensions

    OUTLINES & DIMENSIONS INDOOR UNIT PEAD-M35, 50, 60, 71, 100, 125, 140JA NOTE 1. Use M10 screw for the Suspension bolt (field supply). 2. Keep the service space for the maintenance at the bottom. 3. This chart indicates for PEAD-M60·71·100·125·140JA models, which have 2 fans. PEAD-M35·50JA models have 1 fan. 4.
  • Page 29 PEAD-M35, 50, 60, 71, 100, 125, 140JAL NOTE 1. Use M10 screw for the Suspension bolt (field supply). 2. Keep the service space for the maintenance at the bottom. 3. This chart indicates for PEAD-M60·71·100·125·140JAL models, which have 2 fans. PEAD-M35·50JAL models have 1 fan. 4.
  • Page 30 PEAD-M35, 50, 60, 71, 100, 125, 140JA(L) Secure enough access space to allow for the maintenance, inspection, and replacement of the motor, fan, drain pump, heat exchanger, and electric box in one of the following ways. Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects.

  • Page 31: Wiring Diagram

    WIRING DIAGRAM PEAD-M35, 50, 60, 71, 100, 125, 140JA(L) INSIDE SECTION OF CONTROL BOX R. B. TB15 I. B. TO OUTDOOR UNIT CN3C CN32 P. B. CN105 (BLUE) LED2 (RED) CN41 (RED) CN2A (BLACK) CN51 CN22 (BLUE) ZNR01 ZNR02 CN90 (BLUE) CNXB2 LED1...

  • Page 32: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PEAD-M35, 50, 60, 71, 100, 125, 140JA(L) 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) Strainer (#50)

  • Page 33: Troubleshooting

    TROUBLESHOOTING 9-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: 1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker.
  • Page 34 • If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) For about 2 •For about 2 minutes after power-on,op- After LED 1, 2 are lighted, LED 2 is PLEASE WAIT minutes after...
  • Page 35 [Output pattern A] Errors detected by indoor unit Wired remote Wireless remote controller controller Symptom Remark Beeper sounds/OPERATION INDICATOR lamp flashes Check code (Number of times) Intake sensor error Pipe (Liquid or 2-phase pipe) sensor error P2, P9 E6, E7 Indoor/outdoor unit communication error Drain sensor error Drain pump error...
  • Page 36 For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table. LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit. LED 2 (power for remote controller) Indicates whether power is supplied to the remote controller.
  • Page 37 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. Abnormal point and detection method Countermeasure Error Code Cause Room temperature 1 Defective thermistor 1–3 Check resistance value of thermistor. thermistor (TH1) characteristics 0: ······15.0k"...
  • Page 38 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
  • Page 39 Abnormal point and detection method Countermeasure Error Code 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 (CN44) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
  • Page 40 Abnormal point and detection method Countermeasure Error Code Cause ∗ Check LED display on the outdoor control cir- Indoor/outdoor unit communication 1 Contact failure, short circuit or, 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...
  • Page 41 9-4. TROUBLESHOOTING OF PROBLEMS 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. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
  • Page 42 9-5. TEST POINT DIAGRAM 9-5-1. Power supply board Power supply voltage (220 - 240VAC) CNMF Fan motor output 1 - 4: 310 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC (0 - 15 pulse) Drain-up mechanism output (200VAC)
  • Page 43 9-5-2. Indoor controller board CN22 Emergency operation Model selection CNXA2 Capacity setting CN32 Remote start/stop adapter CNXC2 CN22 For MA remote controller cable con- CNXB2 nection (10 - 13 VDC (Between 1 and 3.)) CN41 CN51 Centralized control CN51 CN41 JAMA standard HA terminal A CN32 CN44 Thermistor (liquid/condenser/evaporator...
  • Page 44 9-6. TROUBLE CRITERION OF MAIN PARTS Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C ~ 30°C) (TH1) Normal Abnormal Pipe temperature 4.3kΩ~9.6kΩ Opened or short-circuited thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Wiring diagram Motor...
  • Page 45 9-8. DC FAN MOTOR (FAN MOTOR/INDOOR CONTROLLER BOARD) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Give attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check...
  • Page 46 9-9. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control p.c. board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are memorized in the nonvolatile memory of the control p.c. board of the unit.

  • Page 47: Disassembly Procedure

    DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 1. Control box 1. Removing the control box cover (1) Remove the two fixing screws on the cover (A) to remove it. Fig. 1 Fig. 2 2. Thermistor (Intake air) 1. Remove the control box cover according to the procedure in section [1].
  • Page 48 Exercise caution when removing heavy parts. 3. Drainpan 1. Removing the filter and the bottom plate (1) Push up the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (D), (E) to remove it.
  • Page 49 Exercise caution when removing heavy parts. 4. Thermistor (Condenser/evaporator) (Liquid pipe) 1. Remove the drain pan according to the proce- dure in section [3]. 2. Removing the Heat exchanger cover (1) Remove the four fixing screws on the heat exchanger cover (F) to remove it. Fig.
  • Page 50 Exercise caution when removing heavy parts. 5. Fan and fan motor 1. Removing the filter and the bottom plate (1) Push down the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (J) to remove it.
  • Page 51 Exercise caution when removing heavy parts. 6. Heat exchanger 1. Remove the drain pan according to the proce- dure in section [3]. 2. Remove the heat exchanger cover according to the procedure in section [4] 2. 3. Removing the cover (1) Remove the five fixing screws on the cover (K) to remove it.
  • Page 52 www.MitsubishiElectric.com New publication effective Mar. 2017 Specifications subject to change without notice HWE16130...
  • Page 53 Related Links Model Number: PEAD-M71JA Mr Slim Power Inverter Brochure - R32 PEAD-M R32 Power Inverter Single Phase Product Information Sheet PEAD-M R32 Standard Inverter Single Phase Product Information Sheet PEAD-M35-140JA Declaration of Conformity PEAD-M35-140JA Installation Manual PEAD-M35-140JA Operation Manual PEAD-M35-140JA Parts List PEAD-M35-140JA Service Manual (HWE16130)

This manual is also suitable for:

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