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Table of Contents
- 1 Table of Contents
- 2 Safety Precaution
- 3 Part Names and Functions
- 4 Specification
- 5 Outlines and Dimensions
- 6 Indoor Unit
- 7 Wiring Diagram
- 8 Refrigerant System Diagram
- 9 Troubleshooting
- 10 Disassembly Procedure
- 11 Parts List
- 12 Rohs PARTS LIST
- Download this manual
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Technical & Service Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Wall Mounted
Series PKFY
Indoor unit
[Model names]
PKFY-P20VAM-E
PKFY-P25VAM-E
R410A
[Service Ref.]
PKFY-P20VAM-E
PKFY-P25VAM-E
REVISED EDITION-A
R407C
R22
Revision:
• RoHS PARTS LIST is added.
• Some descriptions have
been modified.
• Please void OC309.
Note:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
CONTENTS
1. SAFETY PRECAUTION ·····················2
2. PART NAMES AND FUNCTIONS ······6
3. SPECIFICATION ·································8
4. OUTLINES AND DIMENSIONS········10
5. WIRING DIAGRAM ···························11
7. TROUBLESHOOTING ······················12
8. DISASSEMBLY PROCEDURE·········19
9. PARTS LIST······································22
10. RoHS PARTS LIST···························25
July 2006
No. OC309
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Table of Contents
Related Manuals for Mitsubishi Electric PKFY-P20VAM-E
Summary of Contents for Mitsubishi Electric PKFY-P20VAM-E
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Page 1: Table Of Contents
Wall Mounted Series PKFY R410A R407C Indoor unit Revision: [Model names] [Service Ref.] • RoHS PARTS LIST is added. PKFY-P20VAM-E • Some descriptions have PKFY-P20VAM-E been modified. PKFY-P25VAM-E PKFY-P25VAM-E • Please void OC309. Note: • This manual describes only service data of the indoor units. -
Page 2: Safety Precaution
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. The old refrigerant and lubricant in the existing piping If gas refrigerant is used to seal the system, the composition contains a large amount of chlorine which may cause the of the refrigerant in the cylinder will change and performance lubricant deterioration of the new unit. - Page 3 [3] Service tools Use the below service tools as exclusive tools for R407C refrigerant. Tool name Specifications Gauge manifold ·Only for R407C. ·Use the existing fitting SPECIFICATIONS. (UNF7/16) ·Use high-tension side pressure of 3.43MPa·G or over. Charge hose ·Only for R407C. ·Use pressure performance of 5.10MPa·G or over.
- 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 PKFY-P20VAM-E PKFY-P25VAM-E Air intake Air intake grille Filter Auto Vane Guide vane Air Outlet Wired remote controller On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. - 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 3-1. SPECIFICATION Item Unit PKFY-P20VAM-E PKFY-P25VAM-E Single phase, 220-230-240V, 50Hz Power [,V,Hz Single phase, 220V, 60Hz Cooling capacity Heating capacity Cooling 0.04 Power Supply Heating 0.04 Cooling 0.20 Starting Current Heating 0.20 Exterior <munsell symbol> — Plastic munsell : <2.60Y 8.66/0.69>... - Page 9 3-2. ELECTRICAL PARTS SPECIFICATIONS Model Symbol PKFY-P20VAM-E PKFY-P25VAM-E Parts name Room temperature TH21 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" thermistor Liquid pipe thermistor TH22 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" Gas pipe thermistor TH23 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k"...
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Page 10: Outlines And Dimensions
OUTLINES AND DIMENSIONS PKFY-P20VAM-E Unit : mm PKFY-P25VAM-E... -
Page 11: Wiring Diagram
WIRING DIAGRAM PKFY-P20VAM-E PKFY-P25VAM-E Legend Symbol Name Symbol Name Symbol Name Thermistor Pipe temperature,detection/Gas Indoor controller board TH23 Terminal Power supply CN32 Connector Remote switch (0:/15T,25:/5.4T) block Transmission CN41 HA terminal-A Indoor power board Circuit board Address board CN51 Centrally control Varistor SW1<A.B>... -
Page 12: Refrigerant System Diagram
Liquid pipe temperature thermistor TH22 Liquid pipe Heat exchanger Linear expansion valve Room temperature thermistor Strainer TH21 (#100mesh) Models PKFY-P20VAM-E PKFY-P25VAM-E Item Gas pipe {12.7 (1/2”) Liquid pipe {6.35 (1/4”) TROUBLESHOOTING 7-1. HOW TO CHECK PKFY-P20VAM-E PKFY-P25VAM-E Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. - Page 13 <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=3480K ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k' 6.3k' 5.4k'...
- Page 14 <Output pulse signal and the valve operation> Output Output (Phase) Closing a valve : 1 Opening a valve : 4 The output pulse shift in above order. 1. When linear expansion valve operation stops, all output phase become OFF. 2. At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor lock, and vibrates.
- Page 15 7-2. FUNCTION OF DIP SWITCH PKFY-P20VAM-E PKFY-P25VAM-E Operation by switch Switch Pole Function Remarks Thermistor<Intake temperature> Indoor unit Built-in remote controller Address board position Filter clogging Provide Not provide <At delivery> Filter sign indication 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10...
- Page 16 Switch Operation by switch Remarks Address board SW11 1st digit Address can be set while the address unit is stopped. SW12 SW11 setting Address setting should be done when M-NET <At delivery> SW12 remote controller is being used. SW12 SW11 2nd digit address setting...
- Page 17 7-3. TEST POINT DIAGRAM 7-3-1. Indoor controller board PKFY-P20VAM-E PKFY-P25VAM-E CN29 Pipe temperature CN6V CN41 CN32 CN34 thermistor/Gas (TH23) Vane moter output Connector Connector Fan motor rotational (MV) (HA terminal-A) (Remote switch) frequency input (MF) CN21 CN60 Pipe temperature Linear expansion valve...
- Page 18 7-3-2. Indoor power board PKFY-P20VAM-E PKFY-P25VAM-E Fan motor output (MF) Power supply for indoor controller board CN2M Between 1 1 to 3 3 220-240V AC Connect to the terminal block (TB5) (M-NET transmission connecting wire) 24-30V DC (non-polar) FUSE 6.3A 250V...
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Page 19: Disassembly Procedure
DISASSEMBLY PROCEDURE PKFY-P20VAM-E PKFY-P25VAM-E Be careful on removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM Figure 1 Figure 2 THE INSTALLATION PLATE When there is removing plate (1) Remove the corner box at right lower side of the indoor unit. - Page 20 OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 3. REMOVING THE INDOOR MICRO CONTROLLER BOARD Electrical box cover Photo 2 AND INDOOR POWER BOARD (1) Remove the front panel. (Refer to 2) (2) Remove the electrical box cover (screw 4 10). (Refer to the photo 2) INDOOR MICRO CONTROLLER BOARD (1) Disconnect the following connectors on the indoor micro controller board.
- Page 21 OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 5. REMOVING THE NOZZLE ASSEMBLY Photo 5 (1) Remove the front panel (Refer to 2). Heat exchanger Electrical box (2) Remove the electrical box cover. (3) Disconnect the connector (CN5V) on the indoor micro con Drain hose troller board.
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Page 22: Parts List
PKFY-P25VAM-E Part number that is circled is not shown in the figure. Q'ty / set Price Wiring Recom- Remarks No. Parts No. Parts Name Specifications PKFY-P20VAM-E Diagram mended Unit Amount (Drawing No.) Symbol PKFY-P25VAM-E Q'ty R01 22A 635 R01 22A 651... - Page 23 ELECTRICAL PARTS PKFY-P20VAM-E PKFY-P25VAM-E TEMP. ON/OFF 12 13 Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specifications Diagram mended PKFY- PKFY- Unit Amount (Drawing No.) Symbol Q'ty P20VAM-E P25VAM-E T7W B00 675 FAN GUARD R01 22A 530...
- Page 24 HEAT EXCHANGER PARTS PKFY-P20VAM-E PKFY-P25VAM-E Q'ty / set Price Wiring Recom- Remarks No. Parts No. Parts Name Specifications PKFY- PKFY- Diagram mended Unit Amount (Drawing No.) P20VAM-E P25VAM-E Symbol Q'ty R01 H58 480 HEAT EXCHANGER R01 H59 480 HEAT EXCHANGER...
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Page 25: Rohs Parts List
PKFY-P25VAM-E Part number that is circled is not shown in the figure. Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specifications PKFY-P20VAM-E Diagram mended Unit Amount (Drawing No.) Symbol Q'ty PKFY-P25VAM-E R01 23A 635 R01 23A 651... - Page 26 ELECTRICAL PARTS PKFY-P20VAM-E PKFY-P25VAM-E TEMP. ON/OFF 12 13 Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specifications Diagram mended PKFY- PKFY- Unit Amount (Drawing No.) Symbol Q'ty P20VAM-E P25VAM-E T7W 23A 675 FAN GUARD R01 23A 530...
- Page 27 HEAT EXCHANGER PARTS PKFY-P20VAM-E PKFY-P25VAM-E Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specifications PKFY- PKFY- Diagram mended Unit Amount (Drawing No.) P20VAM-E P25VAM-E Symbol Q'ty R01 J37 480 HEAT EXCHANGER R01 J38 480 HEAT EXCHANGER R01 E04 470...
- Page 28 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Jul. 2006 No. OC309 REVISED EDITION-A PDF 8 Distributed in Apr. 2004 No. OC309 PDF 9 New publication, effective Jul. 2006...