Mitsubishi Electric PKFY-P20VAM-E Technical And Service Manual Download Page 1

Page: 1 / 28

TECHNICAL & SERVICE MANUAL

CONTENTS

1. SAFETY PRECAUTION ·····················2

2. PART NAMES AND FUNCTIONS ······6

3. SPECIFICATION ·································8

4. OUTLINES AND DIMENSIONS········10

5. WIRING DIAGRAM ···························11

6. REFRIGERANT SYSTEM DIAGRAM···12

7. TROUBLESHOOTING ······················12

8. DISASSEMBLY PROCEDURE·········19

9. PARTS LIST······································22

10. RoHS PARTS LIST···························25

Indoor unit
[Model names]

[Service Ref.]

PKFY-P20VAM-E

PKFY-P25VAM-E

No. OC309

REVISED EDITION-A

Wall Mounted

Series PKFY

INDOOR UNIT

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

R407C

R22

R410A

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.

Revision:
• RoHS PARTS LIST is added.
• Some descriptions have

been modified.

• Please void OC309.

July 2006

OC309A---1.qxp 06.7.7 3:47 PM Page 1

Summary of Contents for PKFY-P20VAM-E

Page 1: ...l names Service Ref PKFY P20VAM E PKFY P20VAM E PKFY P25VAM E PKFY P25VAM E No OC309 REVISED EDITION A Wall Mounted Series PKFY INDOOR UNIT SPLIT TYPE HEAT PUMP AIR CONDITIONERS R407C R22 R410A 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 Revision Ro...

Page 2: ...low residual oil piping If there is a large amount of residual oil hydraulic oil etc inside the piping and joints deterioration of the lubricant will result Use ESTR ETHER or HAB as the lubricant to coat flares and flange connection parts If large amount of mineral oil enter that can cause deterioration of refrigerant oil etc Use liquid refrigerant to seal the system If gas refrigerant is used to ...

Page 3: ...16 Use high tension side pressure of 3 43MPa G or over 2 Charge hose Only for R407C Use pressure performance of 5 10MPa G or over 3 Electronic scale 4 Gas leak detector Use the detector for R134a or R407C 5 Adapter for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder For R407C Top of cylinder Brown Cylinder with syphon 8 Refrigerant recovery equipment ...

Page 4: ...ols with care If dirt dust or moisture enter into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Do not use a charging cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered Flare tool Electronic refrigerant charging scale Vacuum pump adaptor Size adjustment gauge Gauge manifold Torque ...

Page 5: ...rmed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase Gravimeter Unit 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant No Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over 2 Charge hose Only for R410A Use pressure performance of 5 0...

Page 6: ...ton Monitor Set button Mode button Return button Set Time buttons Back Ahead Timer On Off button Set Day button Opening the door ON OFF button Fan Speed button Filter button Enter button Test Run button Check button Clear button Airflow Up Down button Louver button Operation button To preceding operation number Ventilation button Operation button To next operation number On the controls are set th...

Page 7: ...ponding timer is set Up Down Air Direction indica tor The indicator shows the direc tion of the outcoming airflow One Hour Only indicator Displayed if the airflow is set to weak and downward during COOL or DRY mode Operation varies according to model The indicator goes off after one hour at which time the airflow di rection also changes Room Temperature display Shows the room temperature Louver di...

Page 8: ...Cooling Heating Height Width Depth Gas side Liquid side PKFY P20VAM E 2 2 2 5 PKFY P25VAM E 2 8 3 2 0 04 0 04 0 20 0 20 Plastic munsell 2 60Y 8 66 0 69 295 815 158 Cross fin Lineflow fan 1 5 9 5 6 5 2 4 9 0 0 017 Polyethylene sheet PP honey comb 12 7 1 2 6 35 1 4 PVC pipe VP 16 connectable I D 16 36 35 33 32 8 5 Electric characteristic Single phase 220 230 240V 50Hz Single phase 220V 60Hz Note 1 R...

Page 9: ...3k 25 5 4k 30 4 3k 40 3 0k 250V 6 3A 4 Pole Output 17W PS4V17 1 5µF 440V MSFBC20A76 DC12V L N 250V 20A M1 M2 250V 10A Liquid pipe thermistor Gas pipe thermistor Fan motor capacitor Linear expansion valve PKFY P20VAM E PKFY P25VAM E Room temperature thermistor Fuse Indoor controller board Fan motor with thermal fuse Vane motor with limit switch Power supply terminal block Transmission terminal bloc...

Page 10: ... E PKFY P25VAM E A 159 407 5 328 328 298 235 235 205 205 175 175 170 170 10 10 0 298 407 5 168 135 125 110 35 10 27 5 40 53 65 87 113 128 0 295 260 260 225 225 190 190 180 159 155 155 120 120 85 85 30 30 45 4 4 5 0 0 133 122 5 97 5 85 60 47 5 22 5 15 90 102 5 124 4 4 5 35 4 4 5 40 4 4 5 37 4 11 20 8 4 3 0 72 5 Air intake dimension Air intake Installation plate Knock out hole Installation space 100...

Page 11: ...necter At servicing for outdoor unit always follow the wiring diagram of outdoor unit Please set the switch SW5 according to the power supply voltage Set SW5 to 240V side when the power supply is 230 and 240 volts When the power supply is 220 volts set SW5 to 220V side block Terminal Switch Circuit board Power supply Transmission Address board Mode selection Address setting 1st digit Connection No...

Page 12: ...rmal 1 5 White Red 2 6 Yellow Brown 3 5 Orange Red 4 6 Blue Brown Open or short Measure the resistance between the terminals using a tester Surrounding temperature 25 Normal Normal 200 7 Abnormal 1 2 Red Pink 1 3 Red Blue 1 4 Red Orange 1 5 Red Yellow Open or short 1 Measure the resistance between the terminals using a tester Surrounding temperature 20 2 Without disassembling the parts measure the...

Page 13: ...rmistor R0 15k 3 Fixed number of B 3480K 2 Rt 15exp 3480 0 15k 10 9 6k 20 6 3k 25 5 4k 30 4 3k 40 3 0k Thermistor for lower temperature Linear expansion valve Operation summary of the linear expansion valve Linear expansion valve open close through stepping motor after receiving the pulse signal from the indoor controller board Valve position can be changed in proportion to the number of pulse sig...

Page 14: ...ot closed all the way It is not necessary to exchange the linear expansion valve if the leakage is small and not making any trouble Thermistor Linear expansion valve Motor will idle and make ticking noise when motor is operated while the linear expansion valve is locked This ticking sound is the sign of the abnormality Check the color of lead wire and missing terminal of the con nector Exchange th...

Page 15: ...ntal angle Down B C Effective Not effective Heater 4 degreed up Not effective Effective Target Superheat setting temperature 9 degreed 6 degreed Target Subcool setting temperature 15 degreed 10 degreed ON OFF 1 2 3 4 5 6 7 8 9 10 ON OFF 1 2 3 4 5 6 7 8 9 10 ON OFF 1 2 3 4 ON OFF 1 2 3 4 PKFY P20VAM E MODEL SW2 PKFY P25VAM E Address board At delivery Indoor controller board Indoor controller board ...

Page 16: ... SW12 2nd digit address setting Rotary switch SW14 Connection No Setting SW5 Voltage selection Rotary switch Address setting should be done when M NET remote controller is being used This is the switch to be used when the indoor unit is operated with R2 series outdoor unit as a set If the unit is used at the 230V or 240V area set the voltage to 240V If the unit is used at the 220V set the voltage ...

Page 17: ...ion valve output LEV SW3 Mode selection CN51 Centrally control SW2 Capacity setting CN52 Remote indication CN6V Vane moter output MV CN20 Room temperature thermistor TH21 CN53M Connect to the indoor power board CN53P Between 1 1 to 2 2 24 30V DC non polat Between 3 3 to 5 5 12 5 13 7V DC Pin3 3 Between 4 4 to 5 5 11 5 12 7V DC Pin4 4 CN35M Connect to the indoor power board CN35P LED2 Power supply ...

Page 18: ...ween 3 3 to 5 5 12 5 13 7V DC Pin3 3 Between 4 4 to 5 5 11 5 12 7V DC Pin4 4 LED1 Main power supply Indoor unit 220 240V CN35P Connect to the indoor controller board CN35M CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30V DC non polar FAN Fan motor output MF CND Power supply for indoor controller board Between 1 1 to 3 3 220 240V AC ...

Page 19: ...sh Down Be careful not to damage the airflow adjustment plate with the screw driver PKFY P20VAM E PKFY P25VAM E Be careful on removing heavy parts Figure 1 Figure 2 2 REMOVING THE FRONT PANEL Before removing the front panel leave the open space at upper side of air flow adjustment plate approximately 2 to 3 cm 1 Remove the screw caps then remove the set screws Refer to the photo 1 2 Remove the lef...

Page 20: ...photo 3 Photo 2 Electrical box cover Screw cap Electrical box Photo 3 Indoor micro controller board Indoor power board Indoor power board 4 REMOVING THE ELECTRICAL BOX 1 Remove the front panel Refer to 2 2 Remove the electrical box cover 3 Pull the nozzle assembly toward you as opening the catch of the nozzle assembly 4 Disconnect the indoor outdoor connector 5 Disconnect the following connector o...

Page 21: ...o 6 7 Pull the left hand side of the heat exchanger toward you See the photo 7 8 Remove the line flow fan Photo 6 Heat exchanger Fan motor Photo 7 Heat exchanger 7 REMOVING THE VANE MOTOR 1 Remove the front panel 2 Remove the screw of the electrical parts box cover and remove the cover 3 Remove the screw of the vane motor and remove the motor from the shaft 4 Disconnect the vane motor connector CN...

Page 22: ... BOX BACK PLATE BRAND LABEL No Parts No Parts Name Specifications PKFY P20VAM E PKFY P25VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price 1 1 1 1 1 1 1 1 1 1 3PCS SET DT25C174H03 BC79R798H02 R01 22A 635 R01 22A 651 R01 22A 500 R01 22A 691 R01 22A 096 R01 22A 054 T7W A00 658 R01 22A 808 Part number that is circled is not shown in the figure ...

Page 23: ...M1 M2 3P L N GAS LIQUID PS4V17 KA PAR 21MAA No Parts No Parts Name Specifications PKFY P25VAM E PKFY P20VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price MV FUSE TH21 A B TB5 TB2 P B M B TH23 TH22 MF R B 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 BG00J285G24 T7W B00 675 R01 22A 530 R01 22A 223 R01 22A 00...

Page 24: ... HEAT EXCHANGER CONNECT PIPE LINEAR EXPANSION VALVE No Parts No Parts Name Specifications PKFY P20VAM E PKFY P25VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price R01 H58 480 R01 H59 480 R01 E03 470 R01 E63 401 1 1 1 1 1 1 LEV 1 3 2 ...

Page 25: ...ND LABEL No G G G G G G G G G G RoHS Parts No Parts Name Specifications PKFY P20VAM E PKFY P25VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price 1 1 1 1 1 1 1 1 1 1 3PCS SET DT25C174H03 BC79R798H02 R01 23A 635 R01 23A 651 R01 23A 500 R01 23A 691 R01 23A 096 R01 23A 054 T7W A01 658 R01 23A 808 Part number that is circled is not shown in the figure ...

Page 26: ...D PS4V17 KA PAR 21MAA No G G G G G G G G G G G G G G G G G G G G G G G G Parts No Parts Name Specifications PKFY P25VAM E PKFY P20VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price MV FUSE TH21 A B TB5 TB2 P B M B TH23 TH22 MF R B 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 BG00J285G24 T7W 23A 675 R01 23A ...

Page 27: ...EXCHANGER CONNECT PIPE LINEAR EXPANSION VALVE No G G G G RoHS Parts No Parts Name Specifications PKFY P20VAM E PKFY P25VAM E Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty Unit Amount Q ty set Price R01 J37 480 R01 J38 480 R01 E04 470 R01 H05 401 1 1 1 1 1 1 LEV 1 3 2 ...

Page 28: ...0 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 Made in Japan New publication effective Jul 2006 Specifications subject to change without notice ...

Search results

Summary of Contents for PKFY-P20VAM-E

Reviews:

Related manuals for PKFY-P20VAM-E

Brands by name

Popular brands

Mitsubishi Electric PKFY-P20VAM-E, Technical And Service Manual

Search results

Summary of Contents for PKFY-P20VAM-E

Reviews:

Related manuals for PKFY-P20VAM-E

Brands by name

Popular brands