Mitsubishi Electric City Multi PEFY-M20VMA-A Technical & Service Manual
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Mitsubishi Electric City Multi PEFY-M20VMA-A Technical & Service Manual

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Summary of Contents for Mitsubishi Electric City Multi PEFY-M20VMA-A

  • Page 2 - It may also be in violation of applicable laws. symbol is displayed on the main unit label.) <Color: yellow> - MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for mal- Beware of electric shock (This symbol is displayed on the main functions or accidents resulting from the use of the wrong type of refrigerant.
  • Page 3 Pay a special attention to the place, such as a basement, etc. where re- (1-6) No Ignition Sources frigeration gas can stay, since refrigeration is heavier than the air. No person carrying out work in relation to a refrigeration system which This appliance is intended to be used by expert or trained users in shops, involves exposing any pipe work shall use any sources of ignition in in light industry and on farms, or for commercial use by lay persons.
  • Page 4 searching for or detection of refrigerant leaks. f) Make sure that cylinder is situated on the scales before recovery takes A halide torch (or any other detector using a naked flame) shall not be place. used. g) Start the recovery machine and operate in accordance with manufac- turer’s instructions.
  • Page 5 HWE19070...

  • Page 6: Table Of Contents

    CONTENTS I Features [1] Features............................ 1 II Components and Functions [1] Components and Functions...................... 2 III Specifications [1] Specifications..........................5 1.Specifications.......................... 5 2.Electrical component specifications..................11 IV Outlines and Dimensions [1] Outlines and Dimensions......................14 [2] Service Space......................... 17 V Wiring Diagram [1] Wiring Diagram ........................
  • Page 7 HWE19070...

  • Page 8: Features

    [ I Features ] I Features [1] Features Model Cooling capacity/Heating capacity PEFY-M20VMA(L)(2)-A 2.2/2.5 PEFY-M25VMA(L)(2)-A 2.8/3.2 PEFY-M32VMA(L)(2)-A 3.6/4.0 PEFY-M40VMA(L)(2)-A 4.5/5.0 PEFY-M50VMA(L)(2)-A 5.6/6.3 PEFY-M63VMA(L)(2)-A 7.1/8.0 PEFY-M71VMA(L)(2)-A 8.0/9.0 PEFY-M80VMA(L)(2)-A 9.0/10.0 PEFY-M100VMA(L)(2)-A 11.2/12.5 PEFY-M125VMA(L)(2)-A 14.0/16.0 PEFY-M140VMA(L)-A 16.0/18.0 - 1 - HWE19070...

  • Page 9: Components And Functions

    [ II Components and Functions ] II Components and Functions [1] Components and Functions 1. Indoor (Main) Unit (1) In case of rear inlet (2) In case of bottom inlet Air inlet Air inlet Air outlet Air outlet - 2 - HWE19070...
  • Page 10 [ II Components and Functions ] 2. Remote Controller Once the operation mode is selected, the unit will remain in the selected mode until changed. (1) Remote Controller Buttons Function buttons The functions of the function buttons change depending on the screen. ▌...
  • Page 11 [ II Components and Functions ] (2) Remote Controller Display The main display can be displayed in two different modes: “Full” and “Basic.” The factory setting is “Full.” To switch to the “Basic” mode, change the setting on the Main display setting. ▌...

  • Page 12: Specifications

    [ III Specifications ] III Specifications [1] Specifications 1. Specifications Model PEFY- PEFY- PEFY- PEFY- M20VMA(L)-A M25VMA(L)-A M32VMA(L)-A M40VMA(L)-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity Heating capacity Power consumption Cooling 0.032(0.030) 0.044(0.042) 0.047(0.045) Heating 0.030 0.042 0.045 Current consumption Cooling 0.26 0.36...
  • Page 13 [ III Specifications ] Model PEFY- PEFY- PEFY- PEFY- M50VMA(L)-A M63VMA(L)-A M71VMA(L)-A M80VMA(L)-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity Heating capacity 10.0 Power consumption Cooling 0.066(0.064) 0.087(0.085) 0.080(0.078) Heating 0.064 0.085 0.078 Current consumption Cooling 0.53 0.69 0.60 Heating 0.53 0.69...
  • Page 14 [ III Specifications ] Model PEFY- PEFY- PEFY- M100VMA(L)-A M125VMA(L)-A M140VMA(L)-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity 11.2 14.0 16.0 Heating capacity 12.5 16.0 18.0 Power consumption Cooling 0.142(0.140) 0.199(0.197) 0.208(0.206) Heating 0.140 0.197 0.206 Current consumption Cooling 1.01 1.29 1.40...
  • Page 15 [ III Specifications ] Model PEFY- PEFY- PEFY- PEFY- M20VMA2-A M25VMA2-A M32VMA2-A M40VMA2-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity Heating capacity Power consumption Cooling 0.087(0.085) 0.080(0.078) Heating 0.085 0.078 Current consumption Cooling 0.69 0.60 Heating 0.69 0.60 External finish Galvanized Dimensions Height...
  • Page 16 [ III Specifications ] Model PEFY- PEFY- PEFY- PEFY- M50VMA2-A M63VMA2-A M71VMA2-A M80VMA2-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity 16.0 Heating capacity 18.0 Power consumption Cooling 0.208(0.206) Heating 0.206 Current consumption Cooling 1.40 Heating 1.40 External finish Galvanized Dimensions Height Width...
  • Page 17 [ III Specifications ] Model PEFY- PEFY- M100VMA2-A M125VMA2-A Power supply Voltage 1-phase 220-230-240 Frequency Cooling capacity 16.0 Heating capacity 18.0 Power consumption Cooling 0.208(0.206) Heating 0.206 Current consumption Cooling 1.40 Heating 1.40 External finish Galvanized Dimensions Height Width 1600 Depth Net weight 42(41)

  • Page 18: Electrical Component Specifications

    [ III Specifications ] 2. Electrical component specifications Component Sym- PEFY- PEFY- PEFY- M20VMA(L)-A M25VMA(L)-A M32VMA(L)-A Room temperature TH21 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ thermistor Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ...
  • Page 19 [ III Specifications ] Component Sym- PEFY-M100VMA(L)-A PEFY-M125VMA(L)-A PEFY-M140VMA(L)-A Room temperature TH21 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ thermistor Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ Fuse AC250V 6.3A DC400V 3A...
  • Page 20 [ III Specifications ] Component Sym- PEFY-M50VMA2-A PEFY-M63VMA2-A PEFY-M71VMA2-A Room temperature TH21 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ thermistor Liquid pipe thermistor TH22 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ Gas pipe thermistor TH23 Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ Fuse AC250V 6.3A DC400V 3A...

  • Page 21: Outlines And Dimensions

    [ IV Outlines and Dimensions ] IV Outlines and Dimensions [1] Outlines and Dimensions 1. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMA-A Unit: mm - 14 - HWE19070...
  • Page 22 [ IV Outlines and Dimensions ] 2. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMAL-A Unit: mm - 15 - HWE19070...
  • Page 23 [ IV Outlines and Dimensions ] 3. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125VMA2-A Unit: mm - 16 - HWE19070...

  • Page 24: Service Space

    [ IV Outlines and Dimensions ] [2] Service Space 1. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMA-A Unit: mm - 17 - HWE19070...
  • Page 25 [ IV Outlines and Dimensions ] 2. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMAL-A Unit: mm - 18 - HWE19070...
  • Page 26 [ IV Outlines and Dimensions ] 3. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125VMA2-A Unit: mm - 19 - HWE19070...

  • Page 27: Wiring Diagram

    [ V Wiring Diagram ] V Wiring Diagram [1] Wiring Diagram 1. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMA(L)-A - 20 - HWE19070...
  • Page 28 [ V Wiring Diagram ] 2. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125VMA2-A - 21 - HWE19070...

  • Page 29: Refrigerant System Diagram

    [ VI Refrigerant System Diagram ] VI Refrigerant System Diagram [1] Refrigerant system diagram Gas pipe thermistor TH23 Gas pipe Liquid pipe Brazed connections Strainer (#100 mesh) Linear expansion valve Liquid pipe thermistor TH22 Heat exchanger Room temperature thermistor TH21 Capacity PEFY- PEFY-...

  • Page 30: Troubleshooting

    [ VII Troubleshooting ] VII Troubleshooting [1] Troubleshooting 1. Check methods 1. Component and check points (1) Thermistor Room temperature thermistor (TH21) Liquid pipe thermistor (TH22) Gas pipe thermistor (TH23) Disconnect the connector and measure the resistance between terminals with a tester. (Ambient temperature 10°C - 30°C) Normal Abnormal...
  • Page 31 [ VII Troubleshooting ] 1) Summary of linear expansion valve (LEV) operation The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The LEV position changes in response to the pulse signal. Indoor control board and LEV connection 12VDC Control board...
  • Page 32 [ VII Troubleshooting ] 2) LEV operation Close Open Fully open valve (2000 pulses) No. of pulses Extra tightening (41 pulses) Valve opening degree When the power is turned on, a pulse signal of fully open pulse + 10% pulse is output (valve closure signal), to bring the valve to position A.
  • Page 33 [ VII Troubleshooting ] Valve closure fail- To check the LEV on the indoor unit, check the indoor unit liquid pipe temperature Replace the LEV ure (leaky valve) that appears on the operation monitor on the outdoor unit's multi control board while if the amount of operating the indoor unit in question in the FAN mode and the other indoor units in leakage is great.

  • Page 34: Dc Fan Motor (Fan Motor/Indoor Control Board)

    [ VII Troubleshooting ] 2. DC fan motor (fan motor/indoor control board) 1. CAUTION A high voltage is applied to the connector for connection to the fan motor (CNMF). Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor. 2.

  • Page 35: Address Switch Setting

    [ VII Troubleshooting ] 3. Address switch setting Make sure that power to the unit is turned off. Indoor unit control board 1. When using an ME remote controller, set the address with the rotary switches (SW11, SW12). Address setting is not required when the unit remote controller is used. On-site address setting is required for the indoor units to run.

  • Page 36: Voltage Test Points On The Control Board

    [ VII Troubleshooting ] 4. Voltage test points on the control board 1. PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125, 140VMA(L)-A, PEFY-M20, 25, 32, 40, 50, 63, 71, 80, 100, 125VMA2-A Fuse (AC 250V 6.3A) Power supply voltage (220 - 240VAC) CN2M CN2M For M-NET transmission cable...

  • Page 37: Dipswitch Setting (Factory Setting)

    [ VII Troubleshooting ] 5. Dipswitch setting (Factory setting) 1. Function setting (1) SW1 Switch position Function Switch setting Active Thermistor (Intake air Built-in thermistor on the remote Indoor unit thermistor) controller Filter clogging detection Available Unavailable Filter life 2500 hr 100 hr Outdoor air intake Enabled...
  • Page 38 [ VII Troubleshooting ] 2. Capacity code setting (1) SW2 Dipswitch settings must be made while the unit is stopped. Factory setting The switches are set to correspond to the unit capacity. PEFY-M20VMA(L)(2)-A PEFY-M25VMA(L)(2)-A PEFY-M32VMA(L)(2)-A PEFY-M40VMA(L)(2)-A PEFY-M50VMA(L)(2)-A PEFY-M63VMA(L)(2)-A PEFY-M71VMA(L)(2)-A PEFY-M80VMA(L)(2)-A PEFY-M100VMA(L)(2)-A PEFY-M125VMA(L)(2)-A PEFY-M140VMA(L)-A The figure at left shows that the switches 1 through 5 are set to ON and 6 through 10 are set to OFF.
  • Page 39 [ VII Troubleshooting ] To set the external static pressure with the switches on the control board External static pressure SW21-1 SW21-2 SW21-5 Initial setting M20–M63VMA-A: 35 Pa ○ M71–M140VMA-A: 40 Pa only M20–M100VMA-A, M20–M32VMA2-A: 35 Pa M20–M40VMA2-A M40–M125VMA2-A: 40 Pa ○...

  • Page 40: Disassembly Procedure

    [ VIII Disassembly Procedure ] VIII Disassembly Procedure [1] Disassembly Procedure 1. Control box Exercise caution when removing heavy parts. 1. Removing the control box cover (1) Remove the three fixing screws on the cover (A) to re- move it. Fig.1 Fig.2 - 33 -...

  • Page 41: Thermistor (Intake Air)

    [ VIII Disassembly Procedure ] 2. Thermistor (Intake air) Exercise caution when removing heavy parts. 1. Remove the control box cover according to the procedure in section [1]-1. 2. Remove the thermistor. (1) Pull out the thermistor holder (B) and thermistor (C) on the control box.

  • Page 42: Drainpan

    [ VIII Disassembly Procedure ] 4. Drainpan Exercise caution when removing heavy parts. 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 (F), (G) to remove it.

  • Page 43: Thermistor (Gas Pipe) (Liquid Pipe)

    [ VIII Disassembly Procedure ] 5. Thermistor (Gas pipe) (Liquid pipe) Exercise caution when removing heavy parts. 1. Remove the drain pan according to the procedure in sec- tion [1]-4. 2. Removing the Heat exchanger cover (1) Remove the three fixing screws on the heat exchanger cover (H) to remove it.

  • Page 44: Fan And Fan Motor

    [ VIII Disassembly Procedure ] 6. Fan and fan motor Exercise caution when removing heavy parts. 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 (M) to re- move it.

  • Page 45: Heat Exchanger

    [ VIII Disassembly Procedure ] (4) Remove the four fan case fixing screws to take the top half of the fan casing off. Fig.13 7. Heat exchanger Exercise caution when removing heavy parts. 1. Remove the drain pan according to the procedure in section [1]-4.

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