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Mitsubishi Electric PFFY Series Technical & Service Manual
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Mitsubishi Electric PFFY Series Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PFFY
Indoor unit
[Model names]
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
INDOOR UNIT
Floor Standing
[Service Ref.]
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
Model name
indication
December 2012
R410A
Note:
• This service manual
describes technical data of
the indoor units.
• As for outdoor units refer
to outdoor unit's service
manual.
CONTENTS
1. SAFETY PRECAUTION ......................... 2
3. SPECIFICATION ................................... 12
4. NOISE CRITERIA CURVES ................. 14
5. AIR OUTLET SELECTION ................... 15
7. WIRING DIAGRAM ............................... 17
9. TROUBLE SHOOTING ........................ 19
PARTS CATALOG (OCB537)
No. OCH537

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS December 2012 No. OCH537 TECHNICAL & SERVICE MANUAL Floor Standing R410A Series PFFY Indoor unit [Model names] [Service Ref.] Note: • This service manual PFFY-P20VKM-E2 PFFY-P20VKM-E2 describes technical data of the indoor units. • As for outdoor units refer PFFY-P25VKM-E2 PFFY-P25VKM-E2 to outdoor unit’s service...

  • 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 recovering the refrigerant left in 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: Part Names And Functions

    PART NAMES AND FUNCTIONS 2-1. Indoor Unit Louver Air outlet Air inlet Vane Filter Vane Air outlet Louver OCH537...
  • Page 5 2-2. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA> Wired remote controller function * The functions which can be used are restricted according to the model. : Supported : Unsupported PAR-30MAA/PAR-31MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 ×...
  • Page 6 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. <Full mode> <Basic mode> * All icons are displayed for explanation. Cool Set temp.
  • Page 7 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 Filter information Error information Weekly timer Energy saving...
  • Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from fi ve different settings. Use to turn ON / OFF the louver. •...
  • Page 9 Setting and display items Setting details Initial setting Display Make the settings for the remote controller related items as necessary. details Clock: The factory settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.
  • Page 10 2-3. WIRED REMOTE CONTROLLER <PAR-21MAA> “Sensor” indication Display Section Displayed when the remote controller sensor is used. Day-of-Week For purposes of this 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 11 Caution Only the Power on indicator lights when the unit is stopped and power supplied to the unit. If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available” message.

  • Page 12: Specification

    SPECIFICATION 3-1. Specification Item PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Power source 1-phase 220-240V 50Hz Cooling capacity Heating capacity Power Cooling 0.025 0.025 0.025 0.028 consumption Heating 0.025 0.025 0.025 0.028 Cooling 0.20 0.20 0.20 0.24 Current Heating 0.20 0.20 0.20 0.24 Height Dimension Width...
  • Page 13 3-2. Electrical parts specifications Model Symbol PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Parts name Thermistor (Room temperature Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k TH21 detection) Thermistor (Pipe temperature Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k TH22 detection/Liquid) Thermistor...

  • Page 14: Noise Criteria Curves

    NOISE CRITERIA CURVES PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING High High HEATING HEATING Test conditions, Test conditions, Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19 Cooling : Dry-bulb temperature 27 Wet-bulb temperature 19 Heating : Dry-bulb temperature 20 Wet-bulb temperature 15 Heating : Dry-bulb temperature 20...

  • Page 15: Air Outlet Selection

    AIR OUTLET SELECTION CN43 With this function, air comes out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively. This function is set using the switch SWC on the address board. CN82 1 2 3 4 5 6 7 8 9 10 SW14...

  • Page 16: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PFFY-P20VKM-E2 Unit : mm PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 INDOOR UNIT 4- 6 Hole Installation plate Indoor unit 46.5 46.5 Air out More than More than Air in 100mm 100mm Gas pipe 12.7(flared)1/2 Liquid pipe 6.35(flared)1/4 Air out drain 54.5 137.5 OCH537...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME I. B FAN MOTOR (UPPER) INDOOR CONTROLLER BOARD TH23 PIPE TEMP, DETECTION/GAS CN32 CONNECTOR REMOTE SWITCH FAN MOTOR (LOWER) (0°C/15kΩ, 25°C/5.4kΩ) CENTRALLY CONTROL CN51 VANE MOTOR 1 A.

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Thermistor (Pipe temperature detection/Gas) TH23 Strainer (#50mesh) Gas pipe Thermistor (Pipe temperature detection/Liquid) TH22 Flare connection Liquid pipe Heat exchanger Linear expansion valve Strainer1 (#50mesh) Strainer2 (#50mesh) Strainer (#100mesh) Thermistor (Room temperature detection) TH21 Unit: mm Capacity PFFY-P20,P25,P32,P40VKM-E2...

  • Page 19: Trouble Shooting

    TROUBLE SHOOTING 9-1. HOW TO CHECK THE PARTS PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH21) (Surrounding temperature 10 - 30 ) Liquid pipe temperature thermistor (TH22) Normal Abnormal...
  • Page 20 <Thermistor Characteristic graph> < Thermistor for lower temperature > Room temperature thermistor (TH21) Thermistor for Liquid pipe temperature thermistor (TH22) lower temperature Gas pipe temperature thermistor (TH23) Thermistor R =15k' ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k'...
  • Page 21 <Output pulse signal and the valve operation> Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
  • Page 22 9-2. FAN MOTOR Check method of indoor fan motor (fan motor/control P.C.board) Notes · High voltage is applied to the connecter (CNMF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF1,2) for the motor with the power supply on. P.C.board) (It causes trouble of the control Self check...
  • Page 23 9-3. FUNCTION OF DIP SWITCH The black square ( ) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor <Room temperature Built-in remote controller Indoor unit Address board detection> position Filter clogging detection Provided Not provided <Initial setting>...
  • Page 24 The black square ( ) indicates a switch position. Effective Switch Pole Operation by switch Remarks timing Address board <Initial setting> (Option) Refer to 5. AIR OUTLET SELECTION. outlet (Standard) Option selector Standard SW11 Address board 1s digit Address can be set while the How to set address address SW12...
  • Page 25 9-4. TEST POINT DIAGRAM 9-4-1. Indoor controller board PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Power supply 1-3 : 220-240V AC FUSE 6.3A 250V CNMF1, CNMF2 FAN motor (upper) CNMF11-CNMF21 : DC310V-340V CNMF23-1 : 15V DC CNMF25-1 : 0-6.5V DC CNMF27-1 : 0-15V DC FAN motor (lower) CNMF12-CNMF22 : DC310V-340V CNMF24-2 : 15V DC...
  • Page 26 9-4-2. Address board PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 Function setting SW12 SW11 10ths digit address 1s digit address Air outlet selection setting setting OCH537...

  • Page 27: Disassembly Procedure

    DISASSEMBLY PROCEDURE PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2 OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Push both sides of the upper part of the front grille and pull the front grille open, and then remove the front grille Push Push from the panel.
  • Page 28 OPERATING PROCEDURE PHOTOS Photo 3 2. Removing the indoor controller board and address board (1) Remove the panel. (Refer to procedure 1) (2) Remove the screw of the electrical cover, and then the electrical cover. (See Photo 3) (3) Remove the screw of the ground wires connected to the indoor fan motor (lower), and then the ground wires.
  • Page 29 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the vane motor (MV1) (1) Remove the panel. (Refer to procedure 1) (2) Remove the screws of the vane motor and pull out the vane motor. (See Photo 5) (3) Disconnect the connector from the vane motor. Screws of vane motor 5.
  • Page 30 OPERATING PROCEDURE PHOTOS 6. Removing the vane motor and the limit switch (vane Photo 8 under) (1) Remove the panel. (Refer to procedure 1) (2) Remove the screws of the nozzle assembly (lower). (See Photo 8) (3) Remove the drain hose from the nozzle assembly (lower) and pull out the nozzle assembly (lower) toward you.
  • Page 31 OPERATING PROCEDURE PHOTOS 8. Removing the pipe temperature detection (liquid and Photo 12 gas) thermistors and room temperature thermistor (1) Remove the panel. (Refer to procedure 1) (2) Remove the screw of the electrical cover, and then the electrical cover. (See Photo 3) (3) Remove the pipe temperature detection (liquid and gas) thermistors from the holders.
  • Page 32 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C Copyright 2012 MITSUBISHI ELECTRIC CORPORATION New publication, effective Dec. 2012 Specifications are subject to change without notice. Distributed in Dec. 2012 No. OCH537 Made in Japan...

This manual is also suitable for:

Pffy-p20vkm-e2Pffy-p25vkm-e2Pffy-p32vkm-e2Pffy-p40vkm-e2Pffy-p20-40vkm-e

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