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Mitsubishi Electric PLFY Series Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PLFY-WL32VEM-E
PLFY-WL32VEM-ET
PLFY-WL40VEM-E
PLFY-WL40VEM-ET
PLFY-WL50VEM-E
PLFY-WL50VEM-ET
Grille model
[Model names]
PLP-6EA
PLP-6EAE
PLP-6EAL
PLP-6EALE
PLP-6EAJ
PLP-6EAJE
PLP-6EALM
PLP-6EALME
Model name
indication for
MAIN UNIT
INDOOR UNIT
[Service Ref.]
PLFY-WL32VEM-E.UK
PLFY-WL32VEM-ET.UK
PLFY-WL40VEM-E.UK
PLFY-WL40VEM-ET.UK
PLFY-WL50VEM-E.UK
PLFY-WL50VEM-ET.UK
Model name
indication for GRILLE
CONTENTS
1. SAFETY PRECAUTION .......................... 2
3. SPECIFICATIONS ................................. 10
4. 4-WAY AIR FLOW SYSTEM ................. 13
6. WIRING DIAGRAM ............................... 17
8. TROUBLESHOOTING .......................... 19
9. SPECIAL FUNCTION ........................... 26
10. DISASSEMBLY PROCEDURE ............. 29
PARTS CATALOG (OCB723)
October 2019
No. OCH723

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Summary of Contents for Mitsubishi Electric PLFY Series

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS October 2019 No. OCH723 TECHNICAL & SERVICE MANUAL Indoor unit [Model names] [Service Ref.] PLFY-WL32VEM-E.UK PLFY-WL32VEM-E PLFY-WL32VEM-ET.UK PLFY-WL32VEM-ET PLFY-WL40VEM-E.UK PLFY-WL40VEM-E PLFY-WL40VEM-ET.UK PLFY-WL40VEM-ET PLFY-WL50VEM-E.UK PLFY-WL50VEM-E PLFY-WL50VEM-ET.UK PLFY-WL50VEM-ET Grille model [Model names] PLP-6EA PLP-6EAE PLP-6EAL PLP-6EALE PLP-6EAJ PLP-6EAJE PLP-6EALM PLP-6EALME...

  • Page 2: Safety Precaution

    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. The use of water the pipes sealed until immediately before installation.
  • Page 3 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 4 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. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 5 Menu structure Main menu Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. SELECT Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer...
  • Page 6 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 7 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 8 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 9 2-3. Wireless remote controller 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 10: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-WL32VEM-E PLFY-WL40VEM-E PLFY-WL50VEM-E 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 3,100 3,900 4,800 BTU/h 12,300 15,400 19,100 kcal/h 3,150 4,000 5,000 Power input 0.03 0.03 0.04 Current input...
  • Page 11 3-2. ELECTRICAL PARTS SPECIFICATIONS PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK Service Ref. Symbol Parts name PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK Room temperature TH21 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k" thermistor Liquid pipe thermistor TH22 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k" Gas pipe thermistor TH23 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k"...
  • Page 12 3-4. NC CURVES PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK SPL(dB) LINE SPL(dB) LINE High High PLFY-WL40VEM-ET.UK PLFY-WL32VEM-ET.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 minimum Approximate minimum audible limit on NC-20 audible limit on NC-20 continuous noise continuous noise 1000 2000...

  • Page 13: Way Air Flow 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 14 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 15 4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS PLFY-WL32/40/50VEM-E.UK PLFY-WL32/40/50VEM-ET.UK 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 16: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK Unit: mm OCH723...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK When attaching AUTOMATIC FILTER VALVE KIT(option), ELEVATION PANEL remove the jumper (OPTION PART) connector CN8A and TH23 CN4G fit the FLOW CONTROL VALVE (FCV). tº * Be sure to turn off the source power and TH21 TH22 then disconnect fan motor connector.

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK Pipe temperature detection thermistor/ inlet TH22 Water inlet connection Manual air purge valve Pipe temperature detection thermistor/ outlet TH23 Water outlet connection Heat exchanger Room temperature detection thermistor TH21 Unit : mm Service Ref.

  • Page 19: Troubleshooting

    TROUBLESHOOTING 8-1. HOW TO CHECK THE PARTS PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK Parts name Check points Room temperature Disconnect the connectors, then measure the resistance with a tester. detection thermistor (TH21) (At ambient temperatures of 10 to 30:) Pipe temperature detection Normal Abnormal thermistor/liquid (TH22)
  • Page 20 Parts name Check points Flow control valve Disconnect the connector then measure the resistance between terminals with a tester. (FCV) CN8A Refer to "8-1-2. Flow control valve". Yellow Orange Normal Abnormal Green Blue Purple-Brown Orange-Brown Blue-Brown Green-Brown Open or short Purple (Optional parts) White...
  • Page 21 Ø3 Ø3 Ø3 Ø2 Ø4 Orange Ø2 Ø2 Ø1 Yellow Ø1 Connector (CN8A) Pulse signal output and valve operation The output pulse changes in the following order: Output (phase) Output status number When the valve closes 1 -> 2 -> 3 -> 4 -> 1 When the valve opens 4 ->...
  • Page 22 8-1-4. DC Fan motor (fan motor/indoor controller board) Check method of indoor fan motor (fan motor/indoor controller board) Notes · High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connecter (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller board and fan motor.) Self check Conditions : The indoor fan cannot rotate.
  • Page 23 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 detection> position <Initial setting> Filter clogging detection Provided Not provided Filter cleaning 2,500 hr 100 hr...
  • Page 24 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 25 8-3. TEST POINT DIAGRAM Indoor controller board PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK TB15 MA-Remote controller connecting wire Vane motor output 12 V DC pulse 1–2: 8.7–13 V DC (non-polar) SW21 Number of air outlets and height of M-NET transmission connecting wire the ceiling 24–30 V DC (non-polar) SW14...

  • Page 26: 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 27 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 28 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 29: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK 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. (See Figure 1) Grille (2) Pull down the lever of the air intake grille to remove the filter.
  • Page 30 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 31 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 32 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 33 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 34 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 35 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 36 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Published: Oct. 2019 No.OCH723 Specifications are subject to change without notice. Made in Japan...

This manual is also suitable for:

Plfy-wl32vem-ePlfy-wl32vem-etPlfy-wl40vem-ePlfy-wl40vem-etPlfy-wl50vem-ePlfy-wl50vem-et ... Show all

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