Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual
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Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual

Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PLFY-WL20VEM-E
PLFY-WL20VEM-ET
PLFY-WL25VEM-E
PLFY-WL25VEM-ET
PLFY-WL32VEM-E
PLFY-WL32VEM-ET
PLFY-WL40VEM-E
PLFY-WL40VEM-ET
PLFY-WL50VEM-E
PLFY-WL50VEM-ET
PLFY-WL63VEM-E
PLFY-WL63VEM-ET
PLFY-WL80VEM-E
PLFY-WL80VEM-ET
PLFY-WL100VEM-E
PLFY-WL100VEM-ET
PLFY-WL125VEM-E
PLFY-WL125VEM-ET
Model name
indication for
MAIN UNIT
INDOOR UNIT
[Service Ref.]
PLFY-WL20VEM-E.UK
PLFY-WL20VEM-ET.UK
PLFY-WL25VEM-E.UK
PLFY-WL25VEM-ET.UK
PLFY-WL32VEM-E.UK
PLFY-WL32VEM-ER1.UK
PLFY-WL32VEM-ET.UK
PLFY-WL32VEM-ETR1.UK
PLFY-WL40VEM-E.UK
PLFY-WL40VEM-ER1.UK
PLFY-WL40VEM-ET.UK
PLFY-WL40VEM-ETR1.UK
PLFY-WL50VEM-E.UK
PLFY-WL50VEM-ER1.UK
PLFY-WL50VEM-ET.UK
PLFY-WL50VEM-ETR1.UK
PLFY-WL63VEM-E.UK
PLFY-WL63VEM-ET.UK
PLFY-WL80VEM-E.UK
PLFY-WL80VEM-ET.UK
PLFY-WL100VEM-E.UK
PLFY-WL100VEM-ET.UK
PLFY-WL125VEM-E.UK
PLFY-WL125VEM-ET.UK
Model name
indication for GRILLE
REVISED EDITION-B
Revision:
• PLP-6EAB has been added
in REVISED EDITION-B.
OCH723A is void.
Grille model
[Model names]
PLP-6EA
PLP-6EAE
PLP-6EAL
PLP-6EALE
PLP-6EAJ
PLP-6EAJE
PLP-6EALM
PLP-6EALME
PLP-6EAB
CONTENTS
TECHNICAL CHANGES ............................... 2
1. SAFETY PRECAUTION .......................... 2
3. SPECIFICATIONS ................................... 3
4. 4-WAY AIRFLOW SYSTEM ................... 9
6. WIRING DIAGRAM ............................... 13
8. TROUBLESHOOTING .......................... 14
9. SPECIAL FUNCTION ........................... 21
10. DISASSEMBLY PROCEDURE ............. 24
11. REMOTE CONTROLLER ...................... 31
PARTS CATALOG (OCB723)
July 2023
No. OCH723

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Summary of Contents for Mitsubishi Electric CITY MULTI PLFY Series

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS July 2023 No. OCH723 TECHNICAL & SERVICE MANUAL REVISED EDITION-B Indoor unit [Model names] [Service Ref.] PLFY-WL20VEM-E.UK PLFY-WL20VEM-E Revision: PLFY-WL20VEM-ET.UK PLFY-WL20VEM-ET • PLP-6EAB has been added PLFY-WL25VEM-E.UK in REVISED EDITION-B. PLFY-WL25VEM-E PLFY-WL25VEM-ET.UK PLFY-WL25VEM-ET OCH723A is void. PLFY-WL32VEM-E.UK PLFY-WL32VEM-E PLFY-WL32VEM-ER1.UK...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PLFY-WL32VEM-E.UK PLFY-WL32VEM-ER1.UK PLFY-WL32VEM-ET.UK PLFY-WL32VEM-ETR1.UK PLFY-WL40VEM-E.UK PLFY-WL40VEM-ER1.UK PLFY-WL40VEM-ET.UK PLFY-WL40VEM-ETR1.UK PLFY-WL50VEM-E.UK PLFY-WL50VEM-ER1.UK PLFY-WL50VEM-ET.UK PLFY-WL50VEM-ETR1.UK • Some connectable indoor units have been added. SAFETY PRECAUTION Cautions for units utilizing refrigerant R410A CAUTION Do not use the existing water piping. Only use water. Store the piping materials indoors, and keep both ends of Only use clean water as a refrigerant.

  • Page 3: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-WL20VEM-E PLFY-WL25VEM-E PLFY-WL32VEM-E PLFY-WL40VEM-E PLFY-WL50VEM-E PLFY-WL20VEM-ET PLFY-WL25VEM-ET PLFY-WL32VEM-ET PLFY-WL40VEM-ET PLFY-WL50VEM-ET Power source 1-phase 220–240 V 50 Hz, 1-phase 220 V 60 Hz Cooling capacity (Nominal) kcal/h 1,900 2,400 3,100 3,900 4,800 BTU/h 7,500 9,600 12,300 15,400 19,100 kcal/h 2,000...
  • Page 4 Model PLFY-WL63VEM-E PLFY-WL80VEM-E PLFY-WL100VEM-E PLFY-WL125VEM-E PLFY-WL63VEM-ET PLFY-WL80VEM-ET PLFY-WL100VEM-ET PLFY-WL125VEM-ET Power source 1-phase 220–240 V 50 Hz, 1-phase 220 V 60 Hz Cooling capacity 11.2 14.0 (Nominal) kcal/h 6,100 7,700 9,600 12,000 BTU/h 24,200 30,700 38,200 47,800 kcal/h 6,300 8,000 10,000 12,500 Power input 0.04...

  • Page 5: Electrical Parts Specifications

    3-2. ELECTRICAL PARTS SPECIFICATIONS PLFY-WL•VEM-E/ET Model name Symbol Parts name Room temperature TH21 Resistance 0°C/15 kΩ, 10°C/9.6 kΩ, 20°C/6.3 kΩ, 25°C/5.4 kΩ, 30°C/4.3 kΩ, 40°C/3.0 kΩ thermistor Inlet pipe thermistor TH22 Resistance 0°C/15 kΩ, 10°C/9.6 kΩ, 20°C/6.3 kΩ, 25°C/5.4 kΩ, 30°C/4.3 kΩ, 40°C/3.0 kΩ Outlet pipe thermistor TH23 Resistance 0°C/15 kΩ, 10°C/9.6 kΩ, 20°C/6.3 kΩ, 25°C/5.4 kΩ, 30°C/4.3 kΩ, 40°C/3.0 kΩ...

  • Page 6: Plfy-Wl32Vem-E.uk

    3-4. NC CURVES PLFY-WL20VEM-E.UK PLFY-WL25VEM-E.UK SPL(dB) LINE SPL(dB) LINE High High PLFY-WL20VEM-ET.UK PLFY-WL25VEM-ET.UK Medium1 Medium1 Medium2 Medium2 NC-70 NC-60 NC-50 NC-40 NC-30 Approximate minimum audible limit on NC-20 Approximate minimum continuous noise audible limit on continuous noise 1000 2000 4000 8000 1000 2000...

  • Page 7: Plfy-Wl50Vem-E.uk

    PLFY-WL50VEM-E.UK PLFY-WL63VEM-E.UK SPL(dB) LINE SPL(dB) LINE High PLFY-WL50VEM-ET.UK High PLFY-WL63VEM-ET.UK Medium1 Medium1 Medium2 Medium2 NC-70 NC-60 NC-50 NC-40 NC-30 Approximate minimum Approximate minimum audible limit on audible limit on NC-20 continuous noise continuous noise 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...
  • Page 8 PLFY-WL125VEM-E.UK SPL(dB) LINE High PLFY-WL125VEM-ET.UK Medium1 Medium2 Approximate minimum audible limit on continuous noise 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz OCH723B...

  • Page 9: Way Airflow System

    4-WAY AIRFLOW SYSTEM 4-1. PLACEMENT OF THE AIR OUTLETS • For this grille, the blowout direction comes in 11 patterns. Also, by setting switch on the controller board to the appropriate settings, you can adjust the airflow and speed. Select the settings from Table1 according to the location in which you want to install the unit.
  • Page 10 4-2. BRANCH DUCT HOLE AND FRESH AIR INTAKE HOLE At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. • A fresh air intake hole for the optional multi-functional casement can also be made. Note: The figures marked with * in the drawing below represent the dimensions of the main unit excluding those of the optional multi-functional casement.
  • Page 11 4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS PLFY-WL20/25/32/40/50/63/80/100/125VEM-E PLFY-WL20/25/32/40/50/63/80/100/125VEM-ET Taking air into the unit Multi-functional casement + Standard filter 2 - inlet −25 −50 −50 −100 −75 1 - inlet −100 −150 −125 −200 −150 Airflow rate [m /min] Airflow rate [m /min]...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm OCH723B...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM OCH723B...

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Pipe temperature detection thermistor/ inlet TH22 Water inlet connection Water flow Manual air purge valve Pipe temperature detection thermistor/ outlet TH23 Water outlet connection Water flow Heat exchanger Room temperature detection thermistor TH21 WATER PIPE CONNECTION SIZE Model name PLFY-WL20/25/32/40/50VEM-E PLFY-WL63/80/100/125VEM-E...
  • Page 15 Parts name Checkpoints i-see Sensor Turn the power ON while the i-see Sensor connector is connected to the CN4Z on indoor controller board. A communication between the indoor controller board and i-see Sensor board is made to detect the connection. Normal: When the operation starts, the motor for i-see Sensor is driven to rotate the i-see Sensor.

  • Page 16: Flow Control Valve

    8-1-2. Flow control valve 1) Summary of flow control valve (FCV) operation The FCV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The FCV position changes in response to the pulse signal. Indoor control board and FCV connection Flow control valve Control board...

  • Page 17: Drain Pump

    Pressure sensor (inner water) PS1 Pressure sensor (outlet water) PS2 1) Check that the pressure sensor is connected. 2) Check the pressure sensor wiring for breakage. 8-1-3. Drain pump Drain pump Purple Black 1. Check if the drain float switch works properly. 2.
  • Page 18 8-2. FUNCTION OF DIP SWITCH The black square (■) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Room temperature Indoor unit controller <Initial setting> detection> position Filter clogging detection Provided Not provided Filter cleaning 2,500 hr 100 hr...
  • Page 19 Operation by switch Effective Switch Pole Function Remarks timing SW11 Address setting should be done <Initial setting> 1s digit when M-NET remote controller SW12 SW11 SW12 SW11 address is being used. setting SW12 10s digit Before address This figure means "0". power setting supply...

  • Page 20: Test Point Diagram

    8-3. TEST POINT DIAGRAM Indoor controller board TB15 MA-Remote controller connecting wire Vane motor output – : 8.7–13 VDC (non-polar) 12 VDC pulse SW21 Number of air outlets and height of M-NET transmission connecting wire the ceiling 24–30 VDC (non-polar) SW14 LED2 Branch No.

  • Page 21: Special Function

    SPECIAL FUNCTION 9-1. OPERATION (AUTOMATIC FILTER ELEVATION GRILLE: PLP-6EAJ/PLP-6EAJE) (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 22 9-2. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 9-2-1 DIP SW LED2 LED4 [ 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 will be possible using the emergency up/down switch at the wireless signal receiver (INTAKE GRILLE CONDITION (See table *1))
  • Page 23 9-3. 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. with operation of the remote After recovering from power failure, try again. Power failure controller.

  • Page 24: Disassembly Procedure

    DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the filter Figure 1 Knob Air intake grille (1) Slide the knob of air intake grille toward the arrow to open the air intake grille.
  • Page 25 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the room temperature thermistor (TH21) Photo 3 (1) Remove the electrical box cover. (See Photo 1 and 2) Room temperature (2) Disconnect the connector CN20 (Red) from the indoor detection thermistor controller board. Indoor controller board (3) Remove the room temperature thermistor with its holder.
  • Page 26 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Photo 6 Bell mouth fixing screws 6. Removing the electrical box (1) Remove the electrical box cover (See Photo 1 and 2) and the connectors (Refer to procedure 5). (2) Remove the electrical box fixing screws (M5×10: 2 Bell mouth screw).
  • Page 27 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the fan motor (MF) Photo 10 (1) Remove the turbo fan. (See Photo 8 and refer to Nuts and washers procedure 7) Rubber mounts (2) Remove the lead cover (tapping screw 4×10: 2 screws). (See Photo 10) (3) Loosen the 2 clamps.
  • Page 28 OPERATING PROCEDURE PHOTOS/FIGURES Photo 13 10. Removing the drain pan (1) Remove the electrical box. (See photo 3 and refer to procedure 6) Drain pan (2) Remove the bell mouth (tapping screw 4×10 : 2 screws). (See Photo 6) (3) Remove the drain pan (screw M5×10: 4 screws). Drain pan Drain pan fixing screws...
  • Page 29 OPERATING PROCEDURE PHOTOS/FIGURES Photo 15 12. Removing the drain pump (DP) (1) Remove the drain pan. (Refer to procedure 10) Float switch (2) Cut the hose band and remove the hose. Drain pump (3) Loosen the clamp of the drain pump. (4) Remove the drain pump (tapping screw 4×10: 2 screws/2 hooks).
  • Page 30 OPERATING PROCEDURE PHOTOS/FIGURES Photo 16 13. Removing the float switch (FS) (1) Remove the drain pan. (Refer to procedure 10) Do not hold this floating part (2) Loosen the clamp of the drain pump. (See Photo 15) when lifting; Doing so will cause malfunction.

  • Page 31: Remote Controller

    REMOTE CONTROLLER 11-1. REMOTE CONTROLLER FUNCTIONS <PAR-40MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
  • Page 32 Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...

  • Page 33: Menu Structure

    Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer Weekly timer...
  • Page 34 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
  • Page 35 Main menu list Main Setting and display items Setting details menu Operation Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. •...
  • Page 36 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...

  • Page 37: Controller Interface

    <PAR-SL100A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...

  • Page 38: Error Information

    <PAR-U02MEDA> Controller interface ▌1 Occupancy Sensor The occupancy sensor detects vacancy for energy saving control. ▌2 Brightness Sensor The brightness sensor detects the brightness of the room for energy saving control. ▌3 Temperature & Humidity Sensor The sensor detects the room temperature and the relative humidity. ▌4 LED Indicator The LED indicator indicates the operation status in different colors.
  • Page 39 2. Press the F4 button or the button to reset the error Error information that is occurring. Error code Error unit Unit#1 Time Occurred 2/ 1 4:48 Model name Errors cannot be reset while the ON/OFF operation is prohibited. Serial No. Reset error: Reset button Page Reset...

  • Page 40: Service Menu

    11-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make Service the maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.

  • Page 41: Test Run Operation

    11-4. TEST RUN 11-4-1. PAR-40MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Test run˝ with the F1 or F2 button, and press the [ ] button. 2.
  • Page 42 11-4-2. PAR-SL100A-E 1. Press the button to stop the air conditioner. • If the weekly timer is enabled ( is on), press the button to disable it ( is off). 2. Press the button for 5 seconds. • comes on and the unit enters the service mode. 3.

  • Page 43: Function Setting

    11-5. FUNCTION SETTING 11-5-1. PAR-40MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Lossnay Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Cursor Select ˝Function setting˝, and press the [ ] button.
  • Page 44 11-5-2. PAR-SL100A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and ˝00˝ blinks. (Fig. 11-1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

  • Page 45: Error History

    11-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. 2. Select ˝Error history˝ with the F1 or F2 button, and press Check menu the [ ] button.
  • Page 46 11-7. SELF-DIAGNOSIS 11-7-1. PAR-40MAA 1. Select ˝Service˝ from the Main menu, Diagnosis Self check and press the [ ] button. Remote controller check Select ˝Check˝ from the Service menu, Service menu: and press the [ ] button. Cursor Select ˝Diagnosis˝ from the Check menu, and press the [ ] button.

  • Page 47: Remote Controller Check

    11-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, Service menu: and press the [ ] button.
  • Page 48 11-9. SPECIAL FUNCTION OPERATION SETTING <PAR-U02MEDA> *M-NET remote controller cannot be connected with a refrigerant system which includes branch box. It is necessary to perform “group settings” and “Interlocked LOSSNAY” at making group settings of different refrigerant systems (multiple outdoor unit). (A) Group settings: Enter the indoor unit controlled by the remote controller, check the content of entries, and clear entries, etc.
  • Page 49 (a) Group setting Use this screen to register the indoor units and the AHC to be controlled from the controller. 1. Select an indoor unit or an AHC address in the [Address] field. [Group setting] The number of units that can be registered. Indoor unit: 16 units maximum Address AHC: 1 unit maximum...
  • Page 50 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN ©Copyright 2019 MITSUBISHI ELECTRIC CORPORATION Issued: Jul. 2023 No. OCH723 REVISED EDITION-B Issued: Dec. 2020 No. OCH723 REVISED EDITION-A Published: Oct. 2019 No.OCH723 Specifications are subject to change without notice.

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