Mitsubishi Electric PKFY Series Technical & Service Manual
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Mitsubishi Electric PKFY Series Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PKFY-P10VLM-E
PKFY-P10VLM-ET
PKFY-P15VLM-E
PKFY-P15VLM-DA
PKFY-P15VLM-TH
PKFY-P15VLM-ET
PKFY-P20VLM-E
PKFY-P20VLM-DA
PKFY-P20VLM-TH
PKFY-P20VLM-ET
PKFY-P25VLM-E
PKFY-P25VLM-DA
PKFY-P25VLM-TH
PKFY-P25VLM-ET
PKFY-P32VLM-E
PKFY-P32VLM-DA
PKFY-P32VLM-TH
PKFY-P32VLM-ET
PKFY-P40VLM-E
PKFY-P40VLM-DA
PKFY-P40VLM-TH
PKFY-P40VLM-ET
PKFY-P50VLM-E
PKFY-P50VLM-DA
PKFY-P50VLM-TH
PKFY-P50VLM-ET
INDOOR UNIT
[Service Ref.]
PKFY-P10VLM-E.TH
PKFY-P10VLM-ET.TH
PKFY-P15VLM-E.TH
PKFY-P15VLM-DA.TH
PKFY-P15VLM-TH.TH
PKFY-P15VLM-ET.TH
PKFY-P20VLM-E.TH
PKFY-P20VLM-DA.TH
PKFY-P20VLM-TH.TH
PKFY-P20VLM-ET.TH
PKFY-P25VLM-E.TH
PKFY-P25VLM-DA.TH
PKFY-P25VLM-TH.TH
PKFY-P25VLM-ET.TH
PKFY-P32VLM-E.TH
PKFY-P32VLM-DA.TH
PKFY-P32VLM-TH.TH
PKFY-P32VLM-ET.TH
PKFY-P40VLM-E.TH
PKFY-P40VLM-DA.TH
PKFY-P40VLM-TH.TH
PKFY-P40VLM-ET.TH
PKFY-P50VLM-E.TH
PKFY-P50VLM-DA.TH
PKFY-P50VLM-TH.TH
PKFY-P50VLM-ET.TH
Model name
indication
R410A
CONTENTS
1. SAFETY PRECAUTION .......................... 2
3. SPECIFICATION ................................... 13
4. NOISE CRITERION CURVES ............... 18
6. WIRING DIAGRAM ............................... 24
8. TROUBLESHOOTING .......................... 25
9. DISASSEMBLY PROCEDURE ............. 33
PARTS CATALOG (OCB710)
April 2019
No. OCH710

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2019 No. OCH710 TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model Name] [Service Ref.] PKFY-P10VLM-E.TH PKFY-P10VLM-E PKFY-P10VLM-ET PKFY-P10VLM-ET.TH PKFY-P15VLM-E.TH PKFY-P15VLM-E PKFY-P15VLM-DA PKFY-P15VLM-DA.TH PKFY-P15VLM-TH PKFY-P15VLM-TH.TH PKFY-P15VLM-ET PKFY-P15VLM-ET.TH PKFY-P20VLM-E.TH PKFY-P20VLM-E PKFY-P20VLM-DA PKFY-P20VLM-DA.TH PKFY-P20VLM-TH PKFY-P20VLM-TH.TH PKFY-P20VLM-ET PKFY-P20VLM-ET.TH PKFY-P25VLM-E.TH PKFY-P25VLM-E PKFY-P25VLM-DA...

  • Page 2: Safety Precaution

    SAFETY PRECAUTION Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Do not use the existing refrigerant piping. valve. The old refrigerant and lubricant in the existing piping Vacuum pump oil may flow back into refrigerant cycle and contains a large amount of chlorine which may cause the that can cause deterioration of refrigerant oil, etc.
  • Page 3 [1] Cautions for service (1) Perform service after collecting the refrigerant left in the unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.

  • Page 4: Parts Names And Functions

    PARTS NAMES AND FUNCTIONS 2-1. Indoor unit Filter Air intake Front Panel Emergency operation switch Operation indicator lamp Louver Air outlet Vane Remote control receiving section 2-2. Wired Remote Controller <PAR-40MAA> <PAR-21MAA> Wired remote controller function The functions which can be used are restricted according to each model. : Supported : Unsupported PAR-40MAA...
  • Page 5 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 6 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 7 Menu structure Press the button. Main menu MENU Move the cursor to the desired item with the buttons, and press the SELECT 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...
  • Page 8 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 9 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 10 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 11 WIRED REMOTE CONTROLLER <PAR-21MAA> “Sensor” indication Display Section Displays when the remote controller sensor is used. Day-of-Week For the purposes of explanation, Shows the current day of the week. all parts of the display are shown. During actual operation, only Time/Timer Display the relevant items will be lit.
  • Page 12 2-3. Wireless remote controller 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/ down airflow direction) i-see button* Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button*...

  • Page 13: Specification

    SPECIFICATION 3-1. SPECIFICATIONS Model PKFY-P15VLM-E PKFY-P20VLM-E PKFY-P25VLM-E PKFY-P10VLM-E PKFY-P15VLM-TH PKFY-P20VLM-TH PKFY-P25VLM-TH PKFY-P10VLM-ET PKFY-P15VLM-ET PKFY-P20VLM-ET PKFY-P25VLM-ET Power source 1-phase 220-240 V 50 Hz, 1-phase 220-230 V 60 Hz Cooling capacity kcal/h (Nominal) 1000 1500 1900 2400 BTU/h 4100 5800 7500 9600 Power input 0.02 0.02...
  • Page 14 Model PKFY-P32VLM-E PKFY-P40VLM-E PKFY-P50VLM-E PKFY-P32VLM-ET PKFY-P40VLM-ET PKFY-P50VLM-ET PKFY-P32VLM-TH PKFY-P40VLM-TH PKFY-P50VLM-TH Power source 1-phase 220-240 V 50 Hz, 1-phase 220-230 V 60 Hz Cooling capacity kcal/h (Nominal) 3100 3900 4800 BTU/h 12300 15400 19100 Power input 0.04 0.04 0.05 Current input A 0.35 0.35 0.45...
  • Page 15 Model PKFY-P15VLM-DA PKFY-P20VLM-DA PKFY-P25VLM-DA Power source 1-phase 220-240 V 50 Hz, 1-phase 220-230 V 60 Hz Cooling capacity kcal/h (Nominal) 1500 1900 2400 BTU/h 5800 7500 9600 Power input 0.02 0.02 0.03 Current input A 0.20 0.20 0.25 Heating capacity (Nominal) kcal/h 1600...
  • Page 16 Model PKFY-P32VLM-DA PKFY-P40VLM-DA PKFY-P50VLM-DA Power source 1-phase 220-240 V 50 Hz, 1-phase 220-230 V 60 Hz Cooling capacity kcal/h (Nominal) 3100 3900 4800 BTU/h 12300 15400 19100 Power input 0.05 0.05 0.05 Current input A 0.45 0.45 0.45 Heating capacity (Nominal) kcal/h 3400...
  • Page 17 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. PKFY-P10VLM-(E/ET).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH Symbol PKFY-P25VLM-(E/ET/DA/TH).TH Parts name Room temperature TH21 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" detection thermistor Pipe temperature TH22 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" detection thermistor/liquid Pipe temperature TH23 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k"...

  • Page 18: Noise Criterion Curves

    NOISE CRITERION CURVES NOISE CRITERION CURVES PKFY-P15VLM-(E/ET/TH) PKFY-P10VLM-(E/ET) NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 Approximate minimum NC-20 audible limit on NC-20 Approximate minimum continuous noise audible limit on continuous noise 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...
  • Page 19 PKFY-P40VLM-(E/ET/TH) PKFY-P32VLM-(E/ET/TH) 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 audible limit on continuous noise continuous noise NC-20 NC-20 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz PKFY-P50VLM-(E/ET/TH) NC-70...
  • Page 20 PKFY-P20VLM-DA PKFY-P15VLM-DA NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 Approximate minimum Approximate minimum audible limit on audible limit on continuous noise continuous noise 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz PKFY-P25VLM-DA PKFY-P32VLM-DA...
  • Page 21 PKFY-P40VLM-DA PKFY-P50VLM-DA NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 Approximate minimum NC-20 Approximate minimum audible limit on audible limit on continuous noise continuous noise 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz OCH710...

  • Page 22: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH Unit: mm OCH710...
  • Page 23 PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH Unit: mm OCH710...

  • Page 24: Wiring Diagram

    WIRING DIAGRAM PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH E/ET/TH OCH710...

  • Page 25: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH Pipe temperature detection thermistor/gas (TH23) Gas pipe Flare Strainer (#100mesh) Unit: mm (inch) Pipe temperature detection thermistor/liquid {12.7 (1/2”) Gas pipe (TH22) {6.35 (1/4”) Liquid pipe Liquid pipe Strainer Heat exchanger (#100mesh) Linear expansion valve...
  • Page 26 8-1-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature detection thermistor (TH21) Thermistor for Pipe temperature detection thermistor/liquid (TH22) lower temperature Pipe temperature detection thermistor/gas (TH23) Thermistor R =15 k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15 k"...
  • Page 27 8-1-3. 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 28 <Output pulse signal and the valve operation> The output pulse shifts in below order. Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 •...
  • Page 29 8-2. FUNCTION OF DIP SWITCH PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH The black square ( ) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Intake temperature Indoor unit Address board controller detection>...
  • Page 30 The black square ( ) indicates a switch position. Effective Switch Pole Function Remarks timing Address board Fan speed can be changed depending on SWA <Initial setting> setting. (High ceiling) It follows as the left table. Under Setting operation (Standard) (Fan speed) PKFY-P ** VLM-(E/ET/TH) suspension...
  • Page 31 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board (I.B) PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH CN105 CN2M LED1 IT Terminal M-NET transmission connecting wire Vane motor (MV1,MV2) Main power supply 24 − 30 VDC (non-polar) (Indoor unit : 220 − 240V) 12 VDC pulse output CN60 Linear expansion valve(LEV)
  • Page 32 8-3-2. PCB FOR WIRELESS REMOTE CONTROLLER (W.B), SWITCH BOARD (S.B) and LED BOARD (L.B) PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH PCB FOR WIRELESS SWITCH BOARD (S.B) LED BOARD (L.B) REMOTE CONTROLLER (W.B) SWE1 Emergency operation (HEAT) SWE2 CN302 REC1 Emergency operation (COOL) Connect to Receiving unit...

  • Page 33: Disassembly Procedure

    DISASSEMBLY PROCEDURE PKFY-P10VLM-(E/ET).TH PKFY-P15VLM-(E/ET/DA/TH).TH PKFY-P20VLM-(E/ET/DA/TH).TH PKFY-P25VLM-(E/ET/DA/TH).TH PKFY-P32VLM-(E/ET/DA/TH).TH PKFY-P40VLM-(E/ET/DA/TH).TH PKFY-P50VLM-(E/ET/DA/TH).TH Be careful when removing heavy parts. NOTE: Turn OFF the power supply before assembly. OPERATION PROCEDURE PHOTOS/FIGURES 1. REMOVING THE PANEL Photo 1 (1) Insert the driver to the hole at VANE LOWER shaft and VANE UPPER shaft VANE UPPER slide the VANE LOWER shaft (2 places each).
  • Page 34 OPERATION PROCEDURE PHOTOS/FIGURES 3. REMOVING THE ADDRESS BOARD, THE INDOOR Photo 4 CONTROLLER BOARD, THE WIRELESS Holder of wireless remote CONTROLLER BOARD, LED BOARD Switch board holder controller board and LED board (Holder of switch board) (1) Remove the panel and the corner box. (Refer to procedure 1) Address board (2) Remove the front and side electrical box covers (each 2...
  • Page 35 OPERATION PROCEDURE PHOTOS/FIGURES 6. REMOVING THE INDOOR FAN MOTOR AND THE Photo 8 LINE FLOW FAN Lead wire of pipe thermistor (1) Remove the panel and the corner box. (Refer to procedure 1) (2) Remove the electrical box (Refer to procedure 2) and the Motor band nozzle assembly (Refer to procedure 4).
  • Page 36 OPERATION PROCEDURE PHOTOS/FIGURES 8. REMOVING THE HEAT EXCHANGER AND LEV Photo 12 (1) Remove the panel and the corner box (Refer to procedure 1). Heat exchanger (2) Remove the electrical box (Refer to procedure 3) and the nozzle assembly (Refer to procedure 4). (3) Remove the water cover.
  • Page 37 OCH710...
  • Page 38 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Published: Apr. 2019 No. OCH710 Made in Japan Specifications are subject to change without notice.

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