TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. FEATURES ·········································22. SAFETY PRECAUTION ·····················33. PART NAMES AND FUNCTIONS······44. SPECIFICATION·································65. OUTLINES AND DIMENSIONS ·········86. WIRING DIAGRAM·····························97. REFRIGERANT SYSTEM DIAGRAM···108. TROUBLESHOOTING······················119. DISASSEMBLY PROCEDURE·········16

10. PARTS LIST ·····································19

<Indoor unit>

PKFY-P20VAMPKFY-P25VAM

No. OC163

1998

Models

Wall MountedSeries PKFY

INDOOR UNIT

MODEL NAME

R407C

2

FEATURES1

1. Compact 29.5cm high body fits snugly in even limited spaces.

2. Lightweight 8.5kg unit easy to transport and install.

3. Auto-flap shutter enhances good looks.

4. Front power supply box for easier wiring even after installation.The front power supply box allows electrical wiring work to be done after the indoor unit has been installed. For easierinstallation, all the screws required for securing the indoor unit to the wall are accessible from the front of the unit.

5. 5-way piping provides more flexibility in selecting installation sites.All piping including drainage can be conned from the rear, right, base, left and left rear of the unit, providing muchgreater flexibility in laying out piping and selecting installation sites.

Indoor unit

Wall MountedSeries PKFY

Models

P K F Y- P 2 0 VA MP K F Y- P 2 5 VA M

Cooling capacity/Heating capacity

W

2,300 / 2,6002,900 / 3,300

kcal/h

2,000 / 2,2502,500 / 2,800

3

2 SAFETY PRECAUTION

Precautions for devices that use R407C refriqerant.

Cautions for connecting with R407C outdoor unit..Caution:· Do not use R407C piping after use it for R22.· Do not use the existing refrigerant piping.

-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause therefrigerator oil of the new unit to deteriorate.

· Use refrigerant piping made of C1220(CU-DHP) phosphorus deoxidized copper as specified in the JIS H3300“Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of thepipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any othercontaminant.

-Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.· Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before

brazing. (Store elbows and other joints in a plastic bag.) -If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

· Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.-The refrigerator oil with degrade if it is mixed with a large amount of mineral oil.

· Use liquid refrigerant to fill the system.-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performancemay drop.

· Do not use a refrigerant other than R407C.-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

· Use a vacuum pump with a reverse flow check valve. Evacuate sufficiently for one hour, leave it put for another onehour and be sure not to down the vacuum degree.

· Do not use the following tools that are used with conventional refrigerants.

No. Tool name Specifications1 Gauge manifold ·Only for R407C.

·Use the existing fitting SPECIFICATIONS. (UNF7/16)·Use high-tension side pressure of 35kgf/cm2 or over.

2 Charge hose ·Only for R407C.·Use pressure performance of 52kgf/cm2 or over.

3 Electronic scale4 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 syphon8 Refrigerant recovery equipment.

· Do not use a charging cylinder.-Using a charging cylinder may cause the refrigerator to deteriorate.

· Be especially careful when managing the tools.-If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

· For gas leak detecter, be sure to use it only for HFC refrigerant. (same as for R134a)· If moving, put the cap on the flare at indoor unit side to prevent to mix dust or water.· If measures on refrigerant leackage or repair servicing, be sure to refer the manual for outdoor unit.

4

PART NAMES AND FUNCTIONS3

● Indoor UnitPKFY-P20VAMPKFY-P25VAM

● Remote controller [PAR-F25MA]● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button

repeatedly.

TIMER button

This switches between continuousoperation and the timer operation

AIR SPEED button

The sets the ventilation fan speed.

● Operation buttons

TIMER SETTING button

This sets or switches the currenttime, start time and stop time.

OPERATION SWITCH button

Press this button to switch the coolerelectronic dry (denumidity),automatic and heater modes.

TEMP ADJUSTMENT button

This sets the room temperature. Thetemperature setting can beperformed in 1°C units.

Setting range : Cooler 19°C to 30°CHeater 17°C to 28°C

CHECK-TEST RUN button

Only press this button to perform aninspection check or test operation.Do not use it for nomal operation

FILTER button

This resets the filter serviceindication display

AIR DIRECTION button

This adjusts the vertical angle of theventilation.

ON/OFF button

This switches between the operationand stop modes each time it ispressed. The lamp on this buttonlights during operation.

The model name of the remotecontroller is indicated. LOUVER button

This switches the horizontal fanmotion ON and OFF.

(This button does not operate in thismodel.)

Air intake grille Air intake

Guide vane Air Outlet

Aute Vane

Filter

5

Caution● Only the / display lights when the unit is stopped and power supplied to the unit.● “NOT AVAILABLE” is displayed when the AIR DIRECTION button are pressed.This indicates that this room unit is not

equipped with the fan dieection adjustment function and the louver function.● When the power is turned on, “‘HO” is indicated on the room temperature indication area for a while (maximum for 2

minute). It does not indicate a malfunction. Operation the unit after “‘HO” indication disappear.● When power is turned ON for the first time, it is normal that “HO” is displayed on the room temperature indication(For max.

2minutes.) Please wait until this “HO” indication disappear then start the operation.

CENTRALLYCONTROLLED display

This indicates when the unit iscontrolled by optional features suchas central control type remotecontroller.

TIMER display

This indicates when the continousoperation and time operation modesare set.It also display the time for the timeroperation at the same time as whenit is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standbymode is set from the time the sleepoperation starts until the heating airis discharged.

DEFROST display

This indicates when the defrostoperation is performed.

CHECK display

This indicates when a malfunctionhas occurred in the unit which shouldbe checked.

CLOCK display

The current time , start time and stoptime can be displayed in tensecondintervals by pressing the time switchbutton. The start time or stop time isalways displayed during the timeroperation.

● Display

In this display example on thebottom left, a condition where alldisplay lamps light is shown forexplanation purposes although thisdiffers from actual operation.

Operation lamp

This lamp lights during operation,goes off when the unit stops andflashes when a malfunction occurs.

POWER display

This lamp lights when electricity issupplied to the unit.

SET TEMPERATURE display

This displays the selected settingtemperature.

AIR DIRECTION display

This displays the air direction.

ROOM TEMPERATURE display

The temperature of the suction air isdisplayed during operation. Thedisplay range is 8° to 39°C. Thedisplay flashes 8°C when the actualtemperature is less than 8° andflashes 39°C when the actualtemperature is greater than 39°C.

display

This display lights in the check modeor when a test operation isperformed.

CHECK MODE

TEST RUN

This lamp lights when the filter needto be cleaned.

AIR SPEED display

The selected fan speed is displayed.

FILTER display

6

4 SPECIFICATION

2-1 Specification

Power Supply

Starting Current

Fan ✕ No.

Air flow (Note 2)

External stafic pressure

Fan motor output

Item

Power

Cooling capacity

Heating capacity

Exterior <munsell symbol>

Out dimensions

Heat exchanger

Fan

Insulator

Air filter

Pipe dimensions

Drain pipe size

Noise level

Product weight

Unit

[,V,Hz

Z/h

Z/h

kW

kW

A

A

—

mm

mm

mm

—

—

K/min

Pa

kW

—

—

[mm

[mm

[mm

dB (A)

kg

Cooling

Heating

Cooling

Heating

Height

Width

Depth

Gas side

Liquid side

PKFY-P20VAM

2,000

2,250

PKFY-P25VAM

2,500

2,800

Single phase ,220V-240V,50Hz

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 / 2F>

6.35 <1 / 4F>

Outer dimeter [28 Outer diameter of the connection

36-35-33-32

8.5

Ele

ctric

char

acte

ristic

Note 1. Rating conditions (JIS B8615)Cooling : Indoor 27°C DB. 19.5°C WB

Outdoor 35°C DB. 24°C WBHeating : Indoor 21°C DB.

Outdoor 7°C DB. 6°C WB

Note 2. Air flow and the noise level are indicated as High-Middium 1-Middium2-Low.

7

2-2 Electrical parts specifications

Model

Transformer

Room temperature thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse

(Indoor controller board)

Fan motor

(with thermal fuse)

Fan motor capacitor

Vane motor

(with limit switch)

Liner expansion valve

Power supply terminal block

Transmission terminal block

Symbol

T

TH21

TH22

TH23

FUSE

MF

C1

MV

LEV

TB2

TB5

(Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.2A)

Resistance:

0�C / 15k�, 10�C / 9.6k�, 20�C / 6.3k�, 25�C / 5.4k�, 30�C / 4.3k�, 40�C / 3.0k�

Resistance:

0�C/15k�, 10�C/9.6k�, 20�C/6.3k�, 25�C/5.4k�, 30�C/4.3k�, 40�C/3.0k�

250V 6.3A

4-Pole Output 17W / RC4V17

1.5�F ✕ 440V

MSFBC20A76 DC12V

DC12V Stepping motor drive

Port [3.2 (0~2000pulse) EDM-402ME

(L, N, ;) 264V 20A

(M1, M2,S ) 250V 10A

PKFY-P20VAM/PKFY-P25VAM

8

5 OUTLINES AND DIMENSIONS

Unit : mm

783

C

D

A

B

CB

AD

25.5

159

407.5

328 328

298

235

235

205

205

175

175

170

170

10

100

298

407.5

168

135

125

110

35 10 27.5

40 53 65 87 113

128

0

295

260

260

225

225

190

190180

159155

155

120

120

85

85

30

3045 4450

0

133

122.

597

.5 85 6047

.522

.5 15 9010

2.5

124 4-

4.5✕

35

4-4

.5✕

40 4

-4.5

✕37 4

-11✕

20

8-

4.3

0

72.5

13

Air intake dimension

Air

inta

keIn

stal

latio

n pl

ate

Kno

ck o

ut h

ole

Inst

alla

tion

spac

e

100

or m

ore

20 or more

20 or more

130

or m

ore

Add

ress

boa

rd

Dra

in p

ipe

Liqu

id p

ipe

Fla

re c

onne

ctio

n 1/

4F

Fla

re c

onne

ctio

n 1/

2F

Insu

latio

n ou

t dim

entio

n

28

Insu

latio

nO

ut d

imen

tion

35

Gas

pip

e

Refri

gran

tpi

pe

Add

ress

boa

rd is

pro

tect

ed b

yth

e pl

astic

cov

er.

For

the

setti

ng, r

emar

k 1-

scre

wus

ing

the

scre

w d

river

.

Inst

alla

tion

plat

e

Air

inta

ke d

imen

sion

Air

inta

ke d

imen

sion

Air

outle

t dim

ensi

on

Dra

in p

ipe

leng

th

Gas

pip

e

Det

ail o

f Ter

min

al b

lock

Term

inal

blo

ck fo

r re

mot

e co

ntro

ller

Term

inal

blo

ck fo

r re

mot

e co

ntro

ller

Term

inal

blo

ck fo

r po

wer

sup

ply

addr

ess

boar

d

Air

outle

tan

gle

Air

outle

t di

men

tion

Air

outle

t dire

ctio

n

Det

ail o

fad

dres

s bo

ard

Dip

sw

ich

Term

inal

blo

ck

Term

inal

blo

ck fo

r po

wer

sup

ply

Kno

ck o

ut h

ole

for

right

- h

and

side

pip

ing

Kno

ck o

ut h

ole

for

left

- ha

ndsi

de p

ipin

g

Kno

ck o

ut h

ole

for

unde

r pi

ping

Liqu

id p

ipe

815

630

695

660

450

520

54

50

16 4591

.510

34

2.5

2.516

450

10

455

45

3

R15

R15

R15

R12

R8

R8

R8

10

24.4

116

11060

146

295

21.5

247.

515

0

158

70.3

37.4

52.

560

13

80

4-

9

12-

2.8

87-

5.1

65

17

3

1

1

Not

e1.F

or th

e in

stal

atio

n, b

e su

re to

leav

e so

me

spac

e in

cas

e th

ere

i

s fin

ge a

t edg

e of

the

celin

g.N

ote2

. Use

the

M10

or

W3/

8 bo

lt fo

r th

e is

talla

tion

plat

e.N

ote3

. Ref

er fo

r th

e sp

ecifi

catio

n ta

ble

it be

low

.

Det

ail o

f kno

ck o

ut h

ole

(A B

C)

Conn

ectio

n ou

t dim

entio

n

28

Lota

ry s

witc

h(pa

rt N

o.)

Lota

ry s

witc

h(se

lf ad

dres

s)

Seco

ndry

Prim

ary

Kno

ck o

ut h

ole

for

the

rem

ote

cont

rolle

r w

iring

Kno

ck o

ut h

ole

for

the

rem

ote

cont

rolle

r w

iring

Con

trol

wire

(30

v)

: Fol

low

the

inst

ruct

ion

stat

ed a

t Not

e3 fo

r t

he c

onne

ctio

n w

ith th

e co

ntro

l wire

.

: The

re is

no

term

inal

boa

rd fo

r co

ntlro

ller.

54 or more for left or left back piping

Uni

t tra

nspl

ant p

arts

pipe

hol

e

Pos

ition

det

ail o

f the

tapp

ing

scre

w a

nd b

ats

at p

ipe

inta

ke

Cen

ter

of g

ravi

ty h

ole

for

inst

alla

tion

Air intake dimention

PKFY-P20VAM,PKFY-P25VAM

9

WIRING DIAGRAM6

PKFY-P20VAM, PKFY-P25VAM

Legend

Symbol Name

TH23Gas pipe thermistor(0°C / 15k�, 25°C / 5.4k�)

P.B Indoor power board

ZNR Varistor

FUSE Fuse (6.3A)

F.C Fan phase control

T Transformer

MF Fan motor

C1 Fan motor capacitor

MV Vane motor

LEV Linear expansion valve

Symbol Name

M.B

CN32

Indoor controller board

Remote switch connector

CN41 HA terminal — A connector

CN51 Centrally control connector

CN52 Remote indication connector

SW2 Capacity cord switch

SW3 Function selector

TH21Room temperature thermistor(0°C / 15k�, 25°C / 5.4k�)

TH22Liquid pipe thermistor.(0°C / 15k�, 25°C / 5.4k�)

Symbol Name

TB2

TB5

Power supply terminal block

Transmission terminal block

A.B Address board

SW1 <A.B> Mode selector

SW5 <A.B> Voltage selector

SW11 <A.B> 1st digit address setting

SW12 <A.B> 2nd digit address setting

SW14 <A.B> Connection No. setting

T O NEXTINDOOR UNIT

PULLBOX

FUSE(15A)

BREAKER (15A)

AC220-240V

SW5220V 240V

BLU

WHT

BLU

BLU

RED

BLK

RED

BLU

0 0

M2M1 REMOTE CONTROLLER

DC24-30V

{

BC CONTROLLERT O OUTDOOR UNIT

S(SHIELD)

GRN/YEL

~/N 220-240VAC 50HzPOWER SUPPLY

N

TB2L

MICONBOARD

(WHT)

POWER BOARD

ADDRESS(RED)

(WHT)

REMOTEINDICATION

CONNECTIONNO.

1STDIGIT

2NDDIGIT

3RDDIGIT

ADDRESS(RED)

F.CZNR

31

P.B

See fig:❈1

BLU

YELORN

PNK

WHTYEL

MF

5

TH21TH23 TH22

LEV ORNBLURED

RED

BRN

MV

LED5

0

A.B

SW14SW11SW12

SW1

10987654321OFF

ON 1

1

8

(RED)ADDRESS

CN43

CN82

44

8

6.3A250VFUSE

AC18.4V

T

C1

CND(RED)(GRN)

F AN1 1 21 4 61 2

(BLU)M-NETCN2M

1 2

LIQUIDCN21

CN53-P

MICONBOARD

CN35-P

1

5

M.B

POWER BOARDCN53-M 1 5

3CN35-M 1

LED4 LED3 LED2 LED1

SW24

32

1

0N0FF

SW3

109

87

65

43

21

51

CENTRALLYCONTROL

CN51

54

11

(WHT)

CN52CN42

(RED)ADDRESS

1 8

CN81

(RED)INTAKE

CN20

21

(WHT)

CN60LEV

(BLK)GAS

CN29

(GRN)REVOLUTION

CN33

26 11

6

1 2 3

CN32REMOTESWITCH(WHT)

1 2 31 2 3 4

HACN41(WHT)

(BLU)CN5V

51

TB5

Note1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.2. Symbol [S] of TB5 is the shield wire connection.3. Symbols used in wiring diagram above are, / : terminal block, [ : connector, ● : direct wire connection.4. The setting of the SW2 dip switches differs in the capacity for the detail, see the table below.5. Please set the switch SW5 accordng to the power supply voltage.

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.

[

ONOFF

1 2 3 4

MODELS SW2

PKFY-P20VAMONOFF

1 2 3 4

MODELS SW2

PKFY-P25VAM

<❈ 1>

BG79N652H01

10

7 REFRIGERANT SYSTEM DIAGRAM

Strainer (#100mesh)

Strainer (#50mesh)

Heat exchanger

Room temperature thermistorTH21

Gas pipe thermistorTH23

Liquid pipe thermistorTH22

Gas pipe

Flare

Linear expansion

valve

Gas pipe

PKFY-P20VAM, PKFY-P25VAM

{12.7 <1/2F>

Liquid pipe {6.35 <1/4F>

ModelsItem

Refrigeration pipe size (Flare connection size)

PKFY-P20VAM,PKFY-P25VAM

11

8 TROUBLESHOOTING

6-1. How to check PKFY-P20VAM,PKFY-P25VAM

Room temperaturethermistor(TH21)Liquid pipethermistor(TH22)Gas pipethermistor(TH23)

Vane motor

Fan motor

Linear expansionvalve

Disconnect the connector, then measure the resistance using a tester.(Sorrounding temperature 10°C~30°C)

Part Name Check points

1Measure the resistance between the terminals using a tester.(Surrounding tempreture 20:.)

Disconnect the connector then measure the resistance valve using a tester.(Coil temperature 20°C)

(Refer to the thermistor)

Normal AbnormalWhite-Black 195'

Open or shortRed-Black

Normal

Abnormal

!At first, check if the electrical pressure is 12V between the brown wire(GND) and yellow wire(VCC).

@Slowly start running the fan. It is normal if while the fan rotate once,the electrical pressure change from 0V to12V then go back to 0V.

If the electrical pressure stay at around 0V or 10V, it means the fanmotor has the defects.

200'

Normal

(1)-(5)White-Red

150' ±10%

Abnormal

Open or short(2)-(6)

Yellow-Brown(3)-(5)

Orange-Red(4)-(6)

Blue-Brown

Normal

1-2Red-Pink

400' ± 7%

Abnormal

Open or short1-3

Red-Blue1-4

Red-Orange1-5

Red-Yellow

WhiteRed

Black

Brown Gray Yellow

CN33

1

4

6

3 2 1

FAN1

123456

LEV

White

Yellow

Orange

Blue

Red

Brown

CN60

2Without disassembling the parts, measure the electrical pressure of the gray wire(Signal line) andbrown wire (GND) while the power is on.

1Measure the resistance between the terminals using a tester.(Surrounding tempreture 25:.)

Normal4.3k'~9.6k'

AbnormalOpen or short

Blue

YellowRed

Orange Pink

3

5

1

4 2Connect pin No.

12

0

10

20

30

40

50

-20 -10 0 10 20 30 40 50

< Thermistor for lower temperature >

Temperature (:)

Res

ista

nce

(K"

)

4 [4

3

6

5

[3

2 [2

1 [1

[4

[3

[2

[1

Controller board

Drive circuit

Connector(CN60)

DC12V

Brown

Red

Blue

Orange

Yellow

White

M

4

6

2

3

51

Blue

Brown

Yellow

OrangeRedWhite

Linear expansion valve

<Thermistor Characteristic graph>

Room temperature thermistor(TH21)Liquid pipe thermistor(TH22)Gas pipe thermistor(TH23)Drain sensor(THD)

Thermistor R0=15k' ± 3%Fixed number of B=3480k' ± 2%

Rt=15exp { 3480( ) }

0: 15k'10: 9.6k'20: 6.3k'25: 5.2k'30: 4.3k'40: 3.0k'

Thermistor for lower temperature

Linear expansion valve

① 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 signal.<Connection between the indoor controller board and the linear expasion valve>

1273+t

1273

Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color ofthe lead wire.

13

Output(Phase)

Output

{1

1

ON

{2 ON

{3 OFF

{4 OFF

2

OFF

ON

ON

OFF

3

OFF

OFF

ON

ON

4

ON

OFF

OFF

ON

<Output pulse signal and the valve operation>

➁ Linear expansion valve operation

➂ Trouble shooting

D

A

E

B

C

Open

Extra tightning (80~100pulse)

Pulse number

2000 pulseOpening a valveall the way

Close

Val

ve p

ositi

on (

capa

city

)

654321

LED1k'

Symptom Check points

Operation circuitfailure of the microprocessor.

Disconnect the connector on the controller board, thenconnect LED for checking.

Pulse signal will be sent out for 10 seconds as soon as themain switch is turn on. If there is LED with lights on or lightsoff, it means the operation circuit is abnormal.

Countermeasures

Exchange the indoorcontroller board at drivecircuit failure.

Linear expansionvalve mechanism islocked.

Valve doesn't closecompletely(thermistor leaking).

Wrong connection ofthe connector orcontact failure.

To check the linear expansion valve, operate the indoor unitin fan mode and at the same time operate other indoor unitsin cooling mode, then check the pipe temperature <liquid

pipe temperature> of the indoor unit by theoutdoor multi controller board operationmonitor. During fan operation, linearexpansion valve is closed completely and ifthere are some leaking, detectingtemperature of the thermistor will go lower.If the detected temperature is much lowerthan the temperature indicated in the

remote controller, it means the valve is not closed all the way.It is not necessary to exchange the linear expansion valve, ifthe leakage is small and not making any trouble.

Thermistor

Linearexpansionvalve

Motor will idle and make ticking noise when motor is operatedwhile the linear expansion valve is locked. This ticking soundis the sign of the abnormality.

Check the color of lead wire and missing terminal of theconnector.

Exchange the linearexpansion valve.

Exchange the linearexpansion valve.

If large amount ofthermistor is leaked,exchange the linearexpansion valve.

Disconnect the connectorat the controller board,then check the continuity.

Measure the resistance between the each coil (red-white,red-orange, brown-yellow, brown-blue) using a tester. It isnormal if the resistance is in the range of 150'+10%.

Short or breakage ofthe motor coil of thelinear expansionvalve.

Closing a valve : 1 → 2 → 3 → 4 → 1Opening a valve : 4 → 3 → 2 → 1 → 4

The output pulse shift in above order.❈ 1. When linear expasion 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.

❈ When the switch is turned on, 2200 pulse closeing valve signalwill be send till it goes to A point in order to define the valveposition.

When the valve move smoothly, there is no noise or vibrationoccurring from the linear expansion valve ; however, when thepulse number moves from E to A or when the valve is locked,more noise can be heard than normal situation.

❈ Noise can be detected by placing the ear against the screwdriver handle while putting the screw driver to the linearexpansion valve.

14

6-2. FUNCTION OF DIPSWITCH

PKFY-P20VAM, PKFY-P25VAM

1

2

3

4

5

6

7

8

9

10

1~4

1

2

3

4

5

6

7

8

9

10

Thermistor<Intake temperature>position

ON OFF

Filter crogging Provide Not provide

Filter sign indication 2,500hr 100hr

Air intake Not effective Not effective

Remote indication switching Thermostat ON signal indication Fan output indication

Humidifier control Fan operation at Heating mode Heat thermostat ON is operating

Low (Note 1) Extra low (Note 1)

Setting air flow (Note 1) Reset to SW1-7

Auto reset function Effective Not effective

Power ON/OFF Effective Not effective

Heat pump/Cool only Cooling only Heat pump

Capacity save Available Not available

Vane Available Not available

Not available Available

Vane holizontal angle First setting First setting

Vane cooling limit angle setting (Note 1) Down A,B,C Down A,B,C

Effective Not effective

Heater 4deg up Not effective Effective

Target Superheat setting temperature 9deg 6deg

Target Sybcool setting temperature 15deg 10deg

ONOFF

1 2 3 4 5 6 7 8 9 10

ONOFF

1 2 3 4 5 6 7 8 9 10

ONOFF

1 2 3 4

ONOFF

1 2 3 4

PKFY-P20VAM

MODEL SW2

PKFY-P25VAM

Address board<At delivery>

Indoor controller board

Indoor controller board

<At delivery>

SW3Functionselection

SW2Capacity

codeswitch

SW1Mode

selection

Switch Pole FunctionOperation by switch

Remarks

Built-in remote controller Indoor unit

Indoor linear expansionvalve opening

(Note 1) SW1-7=OFF, SW1-8=ON→Setting air flow.SW1-7=OFF, SW1-8=ON→Indoor fan stop.

Set while the unit is off.

<At delivery>

Set for each capacity.

Set while the unit is off.

(Note 1) At cooling mode, eachangle can be used only 1hour.

Reading change of LEV openingon reversion of after defrosting

Air flow at heatthermostat OFF

15

0

5

9

4

8 37

2

6

1

SW12

10

0

5

9

4

8 37

2

6

1

SW11

1

0

8

F

7

E

6

D 5C

4

B

3

A

2

9

1

SW14

0

5

9

4

8 37

2

6

1

SW120

5

9

4

8 37

2

6

1

SW11

0

8

F

7

E

6

D 5C

4

B

3

A

2

9

1

SW14

Address board

Address board

Operation by switchSwitch Remarks

<At delivery>

<At delivery>

SW111st digitaddresssettingSW12

2st digitaddresssetting

Rot

ary

switc

h

SW14Connector

No.Setting

SW5 Voltageselection

Rot

ary

switc

h

Address setting should be done when networkremote controller (PAR-F25MA) is being used.

This is the switch to be used when the indoorunit is operated with R2, R3 series outdoorunit 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 voltageto 220V.

Address can be set while theunit is stopped.

Address board

2

220V 240V<At delivery>

220V 240V

16

9 DISASSEMBLY PROCEDURE

OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS

1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROMTHE INSTALLATION PLATE

When there is removing plate(1) Remove the corner box at right lower side of the indoor

unit.(2) Insert the removing plate at the back side of the corner box

to remove the indoor unit.(3) Remove the hook by pulling the lower side of the indoor unit

down as shown in the figure 1.

When there is no removing plate or it can not be used for somereason.(1) Remove the front panel.(2) Insert the screw driver to the corner hole at both left and

right side as shown in the figure 2.(3) Push it up then, pull down the lower side of indoor unit and

remove the hook.

Indoor unitremoving plate

Insertthe edge Pull

PushCorner hole

1 2

Push Down

Be carefulnot to damage the airflow adjustmentplate with thescrew driver.

PKFY-P25VAM Be careful on removing heavy parts.

Figure 1 Figure 2

2. REMOVING THE FRONT PANEL

❈ Before removing the front panel, leave the open space atupper side of air flow adjustment plate approximately 2 to 3cm.

(1) Remove the screw caps then remove the set screws.(Refer to the photo 1)

(2) Remove the left side of the front panel, then right side.(3) After removing the lower side of the front panel a little,

remove it as pulling the upper side toward you.❈ Please pay attention to the nozzle assemble.

INSTALLING THE FRONT PANEL(1) Insert the lower side of the front panel under the air

adjusment plate.(2) Set the upper side of the front panel.(3) Set the lower side of the front panel then fix it with the

screws.(4) Press the area indicated as arrow sign and set it to the air

conditioner unit.

Push4

13

2

Photo 1

Figure 3

Front panel

Set screws

Airflow adjustment plate

17

OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS

3. REMOVING THE INDOOR MICRO CONTROLLER BOARDAND 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.(connector in front of)

● CN60, CN51, CN3, CN29, CN21● CN42, CN41, CN20

(2) Pull out the indoor micro controller board toward you, then disconnect the rest of connectors.

● CN-53-M, CN35-M (See the photo 3)

INDOOR POWER BOARD(1) Disconnect the following connectors on the indoor power

board.● FAN1, CN-53-P, CN35-P

(2) Remove the screws of the indoor power board, then pull outthe indoor power board toward you. (See the photo 3)

Photo 2Electrical parts box cover

Screw caps

Electrical parts box

Photo 3 Indoor micro controller board

Indoor powerboard

Indoor powerboard

4. REMOVING THE ELECTRICAL PARTS BOX

(1) Remove the front panel (Refer to 2)(2) Remove the electrical parts box cover.(3) Pull the nozzle assemble toward you as opening the catch

of the nozzle assemble.(4) Disconnect the indoor/outdoor connector.(5) Disconnect the following connector on the indoor micro con

troller board. (See the photo 4)● CN60, CN5V, CN33, CN29, CN21, CN20

(6) Remove the connector FAN1 on the indoor power board.(7) Disconnect the ground wire.(8) Pull the disconnected lead wire out from the electrical parts

box.(9) Push up the upper fixture catch to remove the box, then pull

the lower fixture and remove it from the box fixture.

Photo 4Indoor microcontroller board

fixture (upper)

Indoor powerboard

fixture (lower)

Ground wire set screw Electrical parts box

Electrical parts box

18

OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS

5. REMOVING THE NOZZLE ASSEMBLE

(1) Remove the front panel (Refer to 2).(2) Remove the electrical parts box cover.(3) Disconnect the connector (CN5V) on the indoor micro con

troller board.(4) After unhook the right side of the corner box, press the

upper left side and remove the corner box.(5) Remove the nozzle assemble from the fixture.

(See the photo 5)(6) Remove the drain hose.

Photo 5

Heat exchanger Electrical parts box

fixture

Drain hose

6. REMOVING THE LINEFLOW FAN AND THE FAN MOTOR

(1) Remove the front panel (Refer to 2).(2) Remove the nozzle assembling (Refer to 5).(3) Remove the electrical parts box.(4) Remove the fixture while pressing the right side of motor fix

ture catch (See the photo 6).(5) Remove the left side of the motor fixture.(6) Loosen the screw that fixes the line flow fan to the fan

motor, then remove the fan motor by sliding it to the right side.(See the photo 6)

(7) Pull the left-hand side of the heat exchanger toward you.(See the photo 7)

(8) Remove the lineflow fan.

Photo 6Heat 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 (CN5V) on the indoor

controller board.

Photo 8Heat exchanger

Vane motor

Nozzle assemble

8. REMOVING THE LIQUID PIPE THERMISTOR AND GASPIPE THERMISTOR

(1) Remove the front panel (Refer to 2).(2) Remove the electrical box cover.(3) Remove the pipe cover.(4) Cut the wiring fixed band.(5) Remove the liquid pipe thermistor and gas pipe thermistor.

(See the photo 9)(6) Disconnect the connector (N29) (CN21) on the indoor micro

controller board.

Photo 9Heat exchanger

Drain hose

fixture set screwset screws

Drain hoseNozzle assemble

fixture (left)

Nozzle assemble

fixture

Line flow fan

Heat exchangerfixture (left)

Vane motor connect screw

Liquid pipethermistor

Gas pipe thermistor

Electrical parts box

fixture (right)

19

PARTS LIST10

PANEL PARTSPKFY-P20VAMPKFY-P25VAM

1

2

3

4

5

6

7

8

9

10

FRONT PANEL

INTAKE GRILLE

RECEVING COVER

AIR FILTER

BOX

CORNER BOX

BACK PLATE

SCREW CAP

GRILLE CATCH

BRAND LABEL

No. Parts No. Parts Name Specifications PKFY-P20VAMPKFY-P25VAM

Remarks(Drawing No.)

WiringDiagramSymbol

Recom-mended

Q'tyUnit Amount

Q'ty / set Price

1

1

1

1

1

1

1

1

1

1

(DT25C174H03)

3PCS/SET

(BC79R798H02)

R01 22A 651

R01 22A 691

—

R01 22A 500

R01 22A 635

T7W A00 658

R01 22A 808

R01 22A 096

R01 22A 054

—

20

ELECTRICAL PARTSPKFY-P20VAM,PKFY-P25VAM

1

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

21

22

23

24

NOZZLE

AUTO VANE

DRAIN HOSE

FAN MOTOR

RUBBER MOUNT

BEARING MOUNT

SLEEVE BEARING

INDOOR CONTROLLER BOARD

POWER BOARD

ELECTRICAL BOX

ELECTRICAL BOX

TERMINAL BLOCK

TERMINAL BLOCK

ROOM TEMPERATURE THERMISTOR

LIQUID PIPE THERMISTOR

VANE MOTOR

LINEFLOW FAN

FUSE

ADDRESS BOARD

MOTOR BAND

GAS PIPE THERMISTOR

REMOTE CONTROLLER

COARD REMOCON

CONTROLLER COVER

FAN GUARD

RC4V17-AA

2P (M1, M2)

3P (L, N, ;)

250V 6.3A

PAR-F25MA

10m

No. Parts No. Parts Name Specifications PKFY-P25VAM

PKFY-P20VAM

Remarks(Drawing No.)

WiringDiagramSymbol

Recom-mended

Q'tyUnit Amount

Q'ty / set Price

MF

M.B

P.B

TB2

TB5

TH21

TH22

MV

FUSE

A.B

TH23

R.B

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

1

1

1

1

1

1

1

1

1

1

1

1

(BG00N801B33)

(BG00N801B34)

(BG00G828G04)

R01 22A 530

R01 22A 002

R01 22A 527

T7W A00 762

R01 22A 105

R01 22A 102

R01 005 103

R01 99W 310

T7W B02 313

—

—

T7W A10 716

T7W A11 716

R01 93W 202

R01 22A 202

R01 22A 223

R01 22A 114

T7W 520 239

T7W B01 294

R01 22A 126

R01 99W 202

T7W B00 713

T7W A00 305

—

T7W B00 675

10

FILTER

CHECK MODE

TEST RUN

22

21

20

1

24

21

HEAT EXCHANGER PARTSPKFY-P20VAMPKFY-P25VAM

1

1

1

1

1

1

1

2

3

HEAT EXCHANGER

HEAT EXCHANGER

CONNECT PIPE

LINEAR EXPANSION VALVE

No. Parts No. Parts Name Specifications PKFY-P20VAM

PKFY-P25VAM

Remarks(Drawing No.)

WiringDiagramSymbol

Recom-mended

Q'tyUnit Amount

Q'ty / set Price

LEV

R01 99W 480

R01 00Y 480

R01 99W 470

R01 22A 401

cCopyright 1998 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.Issued in Jun. 1998. No. OC163 564 Printed in Japan

HEAD OFFICE MISTUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO

New publication, effective Jun. 1998Specifications subject to change without notice