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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PFFY
Indoor unit
[Model names]
PFFY-P20VKM-E
PFFY-P25VKM-E
PFFY-P32VKM-E
PFFY-P40VKM-E
INDOOR UNIT
NOTE:
This service manual describes technical data of the indoor units.
• As for outdoor units refer to outdoor unit's service manual.
• RoHS compliant products have <G> mark on the spec name plate.
Floor Standing
[Service Ref.]
PFFY-P20VKM-E
PFFY-P20VKM-ER1
PFFY-P25VKM-E
PFFY-P25VKM-ER1
PFFY-P32VKM-E
PFFY-P32VKM-ER1
PFFY-P40VKM-E
PFFY-P40VKM-ER1
Indication of model name
November 2008
REVISED EDITION-A
R410A
R407C
Revision:
• PFFY-P20/25/32/40
VKM-ER1 are added in
REVISED EDITION-A.
• Some descriptions have
been modified.
• Please void OC404.
CONTENTS
1. TECHNICAL CHANGES ......................... 2
2. SAFETY PRECAUTION .......................... 2
3. PART NAMES AND FUNCTIONS .......... 6
4. SPECIFICATION ..................................... 8
5. NOISE CRITERIA CURVES .................. 10
6. AIR OUTLET SELECTION .................... 11
7. OUTLINES AND DIMENSIONS ............ 12
8. WIRING DIAGRAM ............................... 13
9. REFRIGERANT SYSTEM DIAGRAM ...... 14
10. TROUBLE SHOOTING ......................... 15
11. DISASSEMBLY PROCEDURE ............. 23
12. RoHS PARTS LIST ............................... 28
No. OC404
R22
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Table of Contents
Related Manuals for Mitsubishi Electric PFFY-P20VKM-ER1
Summary of Contents for Mitsubishi Electric PFFY-P20VKM-ER1
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Page 1: Table Of Contents
Floor Standing Series PFFY R410A R407C Indoor unit [Model names] [Service Ref.] Revision: PFFY-P20VKM-E PFFY-P20VKM-E • PFFY-P20/25/32/40 VKM-ER1 are added in PFFY-P20VKM-ER1 REVISED EDITION-A. • Some descriptions have PFFY-P25VKM-E been modified. PFFY-P25VKM-E • Please void OC404. PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E... -
Page 2: Technical Changes
TEHNICAL CHANGES PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 INDOOR CONTROLLER BOARD (I.B.) has been changed. SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to seal the system. - Page 3 [1] Cautions for service ·After recovering the all refrigerant in the unit, proceed to working. ·Do not release refrigerant in the air. ·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder.
- Page 4 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 5 [1] Cautions for service (1) Perform service after collecting 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.
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Page 6: Part Names And Functions
PART NAMES AND FUNCTIONS Indoor Unit Louver Air inlet Air outlet Vane Filter Damper Air outlet Louver Wired remote controller Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. Operation buttons ON/OFF button Set Temperature buttons Down... - Page 7 Display “Sensor” indication 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 as lit. During actual operation, only Time/Timer Display the relevant items will be lit. “Locked”...
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Page 8: Specification
SPECIFICATION 4-1. Specification PFFY-P20VKM-E PFFY-P25VKM-E PFFY-P32VKM-E PFFY-P40VKM-E Item PFFY-P20VKM-ER1 PFFY-P25VKM-ER1 PFFY-P32VKM-ER1 PFFY-P40VKM-ER1 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... - Page 9 4-2. Electrical parts specifications Model PFFY-P20VKM-E PFFY-P25VKM-E PFFY-P32VKM-E PFFY-P40VKM-E Symbol PFFY-P20VKM-ER1 PFFY-P25VKM-ER1 PFFY-P32VKM-ER1 PFFY-P40VKM-ER1 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...
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Page 10: Noise Criteria Curves
NOISE CRITERIA CURVES PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 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... -
Page 11: 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 12: Outlines And Dimensions
OUTLINES AND DIMENSIONS PFFY-P20VKM-E PFFY-P20VKM-ER1 Unit : mm PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 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... -
Page 13: Wiring Diagram
WIRING DIAGRAM PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME I. B INDOOR CONTROLLER BOARD FAN MOTOR (UPPER) TH23 PIPE TEMP. DETECTION/GAS CONNECTOR REMOTE SWITCH CN32 FAN MOTOR (LOWER) (0 /15k , 25 /5.4k ) -
Page 14: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 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) -
Page 15: Trouble Shooting
TROUBLE SHOOTING 10-1. HOW TO CHECK PFFY-P20VKM-E PFFY-P32VKM-E PFFY-P25VKM-E PFFY-P40VKM-E PFFY-P20VKM-ER1 PFFY-P32VKM-ER1 PFFY-P25VKM-ER1 PFFY-P40VKM-ER1 Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH21) (Surrounding temperature 10 ~30 ) Liquid pipe temperature... - Page 16 <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 17 <Output pulse signal and the valve operation> Output Output (Phase) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
- Page 18 10-2. 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 19 10-3. FUNCTION OF DIP SWITCH 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> Filter cleaning 2,500hr 100hr Fresh air intake Effective Not effective 1 2 3 4 5 6 7 8 9 10...
- Page 20 Effective Switch Pole Operation by switch Remarks timing Address board <Initial setting> (Option) Refer to 6. 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 SW11 unit is stopped.
- Page 21 10-4. TEST POINT DIAGRAM 10-4-1. Indoor controller board PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 Power supply 1-2 : 220-240V AC FUSE 6.3A 250V CNMF1, CNMF2 FAN motor (upper) CNMF11-CNMF21 : DC280V CNMF23-1 : 15V DC CNMF25-1 : 0-6.5V DC...
- Page 22 10-4-2. Address board PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 Function setting SW12 SW11 10ths digit address 1s digit address Air outlet selection setting setting...
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Page 23: Disassembly Procedure
DISASSEMBLY PROCEDURE PFFY-P20VKM-E PFFY-P32VKM-E PFFY-P25VKM-E PFFY-P40VKM-E PFFY-P20VKM-ER1 PFFY-P32VKM-ER1 PFFY-P25VKM-ER1 PFFY-P40VKM-ER1 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... - Page 24 OPERATING PROCEDURE PHOTOS Photo 3 2. Removing the indoor controller board and address board (1) Remove the panel. (Refer to 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 25 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the vane motor (MV1) (1) Remove the panel. (Refer to 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. Screw of vane motor 5.
- Page 26 OPERATING PROCEDURE PHOTOS 6. Removing the damper motor and the damper Photo 8 limit switch (1) Remove the panel. (Refer to 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 27 OPERATING PROCEDURE PHOTOS 8. Removing the pipe temperature detection Photo 12 (liquid and gas) thermistors and room temperature thermistor (1) Remove the panel. (Refer to 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.
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Page 28: Rohs Parts List
RoHS PARTS LIST 12-1. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1... - Page 29 12-1. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part name Remarks PFFY-P20/25/32/40 Diagram VKM-E VKM-ER1 NOZZLE ASSEMBLY (UPPER) T7W E00 530 HORIZONTAL VANE (UPPER) T7W E07 002 HORIZONTAL VANE (LOWER) T7W E06 002...
- Page 30 12-2. STRUCTURAL PARTS PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 12-2. STRUCTURAL PARTS Q'ty/unit Symbol in Wiring Part No. Part name Remarks PFFY-P20/25/32/40VKM-E Diagram PFFY-P20/25/32/40VKM-ER1 T7W E01 635 T7W E06 651 PANEL ASSEMBLY T7W E05 691 FRONT PANEL T7W E01 500...
- Page 31 12-3. INDOOR UNIT HEAT EXCHANGER PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1 12-3. INDOOR UNIT HEAT EXCHANGER Q'ty/unit Symbol in Wiring Part No. Part name PFFY-P20/25/32/40 Remarks Diagram VKM-E VKM-ER1 HAIR PIN COVER T7W E00 031 INDOOR HEAT EXCHANGER...
- Page 32 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective Nov. 2008 Distributed in Nov. 2008 No. OC404 REVISED EDITION-A PDF 7 Specifications subject to change without notice. Distributed in Jul. 2006 No. OC404 PDF 8...
- Page 33 Related Links Model Number: PFFY-P40VKM-E PFFY-P20-40PVKM-E Parts Catalogue (OCB537) PFFY-P20-40VKM-E Declaration of Conformity PFFY-P20-40VKM-E Installation Manual (RG79D841H02) PFFY-P20-40VKM-E Instruction Book (RG79D970H03) PFFY-P20-40VKM-E Product Information Sheet PFFY-P20-40VKM-E Service Manual (OCH537) PFFY-P20-40VKM_Declaration_of_Conformity_(CE2010A16) PFFY-P20-40VKM_Installation_Manual_(RG79D841H01) PFFY-P20-40VKM_Instruction_Book_(RG79D837H01) PFFY-P20-40VKM_Parts_Catalog_(OCB537) PFFY-P20-40VKM_Service_Manual_(OC404A)