Mitsubishi Electric PKFY-P20VAM Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES ·········································2
2. SAFETY PRECAUTION ·····················3
3. PART NAMES AND FUNCTIONS······4
4. SPECIFICATION·································6
5. OUTLINES AND DIMENSIONS ·········8
6. WIRING DIAGRAM·····························
7. REFRIGERANT SYSTEM DIAGRAM···10
8. TROUBLESHOOTING······················11
. DISASSEMBLY PROCEDURE·········16
10. PARTS LIST ·····································1
<Indoor unit>
PKFY-P20VAM
PKFY-P25VAM
No. OC163
1 8
Models
Wall Mounted
Series PKFY
INDOOR UNIT
MODEL NAME
R407C

2
FEATURES
1
1. Compact 2 .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 supp y box a ows e ectrica wiring work to be done after the indoor unit has been insta ed. For easier
insta ation, a the screws required for securing the indoor unit to the wa are accessib e from the front of the unit.
5. 5-way piping provides more flexibility in selecting installation sites.
A piping inc uding drainage can be conned from the rear, right, base, eft and eft rear of the unit, providing much
greater f exibi ity in aying out piping and se ecting insta ation sites.
Indoor unit
Wall Mounted
Series PKFY
Models
PKFY-P20VAM
PKFY-P25VAM
Cooling capacity/Heating capacity
W
2,300 / 2,600
2,900 / 3,300
kca /h
2,000 / 2,250
2,500 / 2,800

3
2SAFETY 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 o d refrigerant and refrigerator oi in the existing piping contains a arge amount of ch orine which may cause the
refrigerator oi 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 the
pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other
contaminant.
-Contaminants on the inside of the refrigerant piping may cause the refrigerant residua oi 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 cyc e, deterioration of the oi and compressor troub e may resu t.
· Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.
-The refrigerator oi with degrade if it is mixed with a arge amount of minera oi .
· Use liquid refrigerant to fill the system.
-If gas refrigerant is used to sea the system, the composition of the refrigerant in the cy inder wi change and performance
may drop.
· Do not use a refrigerant other than R407C.
-If another refrigerant (R22, etc.) is used, the ch orine in the refrigerant may cause the refrigerator oi to deteriorate.
· Use a vacuum pump with a reverse flow check valve. Evacuate sufficiently for one hour, leave it put for another one
hour and be sure not to down the vacuum degree.
· Do not use the following tools that are used with conventional refrigerants.
No. Too name Specifications
1Gauge manifo d ·On y for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 35kgf/cm2or over.
2Charge hose ·On y for R407C.
·Use pressure performance of 52kgf/cm2or over.
3E ectronic sca e
4Gas eak detector ·Use the detector for R134a or R407C.
5Adapter for reverse f ow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cy inder. ·For R407C ·Top of cy inder (Brown)
·Cy inder with syphon
8Refrigerant recovery equipment.
· Do not use a charging cylinder.
-Using a charging cy inder may cause the refrigerator to deteriorate.
· Be especially careful when managing the tools.
-If dust, dirt, or water gets in the refrigerant cyc e, 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 FUNCTIONS
3
● Indoor Unit
PKFY-P20VAM
PKFY-P25VAM
● Remote controller [PAR-F25MA]
● Once the operation of the unit is set, subsequent operations can on y be performed by pressing the ON/OFF button
repeated y.
TIMER button
This switches between continuous
operation and the timer operation
AIR SPEED button
The sets the venti ation fan speed.
● Operation buttons
TIMER SETTING button
This sets or switches the current
time, start time and stop time.
OPERATION SWITCH button
Press this button to switch the coo er
e ectronic dry (denumidity),
automatic and heater modes.
TEMP ADJUSTMENT button
This sets the room temperature. The
temperature setting can be
performed in 1°C units.
Setting range :
Coo er 19°C to 30°C
Heater 17°C to 28°C
CHECK-TEST RUN button
On y press this button to perform an
inspection check or test operation.
Do not use it for noma operation
FILTER button
This resets the fi ter service
indication disp ay
AIR DIRECTION button
This adjusts the vertica ang e of the
venti ation.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The amp on this button
ights during operation.
The mode name of the remote
contro er is indicated.
LOUVER button
This switches the horizonta fan
motion ON and OFF.
(This button does not operate in this
mode .)
Air intake gri e Air intake
Guide vane Air Out et
Aute Vane
Fi ter

5
Caution
●On y the / disp ay ights when the unit is stopped and power supp ied to the unit.
●“NOT AVAILABLE” is disp ayed when the AIR DIRECTION button are pressed.This indicates that this room unit is not
equipped with the fan dieection adjustment function and the ouver function.
● When the power is turned on, “‘HO” is indicated on the room temperature indication area for a whi e (maximum for 2
minute). It does not indicate a ma function. Operation the unit after “‘HO” indication disappear.
● When power is turned ON for the first time, it is norma that “HO” is disp ayed on the room temperature indication(For max.
2minutes.) P ease wait unti this “HO” indication disappear then start the operation.
CENTRALLY
CONTROLLED disp ay
This indicates when the unit is
contro ed by optiona features such
as centra contro type remote
contro er.
TIMER disp ay
This indicates when the continous
operation and time operation modes
are set.
It a so disp ay the time for the timer
operation at the same time as when
it is set.
OPERATION MODE disp ay
This indicates the operation mode.
STANDBY disp ay
This indicates when the standby
mode is set from the time the s eep
operation starts unti the heating air
is discharged.
DEFROST disp ay
This indicates when the defrost
operation is performed.
CHECK disp ay
This indicates when a ma function
has occurred in the unit which shou d
be checked.
CLOCK disp ay
The current time , start time and stop
time can be disp ayed in tensecond
interva s by pressing the time switch
button. The start time or stop time is
a ways disp ayed during the timer
operation.
●Display
In this disp ay examp e on the
bottom eft, a condition where a
disp ay amps ight is shown for
exp anation purposes a though this
differs from actua operation.
Operation amp
This amp ights during operation,
goes off when the unit stops and
f ashes when a ma function occurs.
POWER disp ay
This amp ights when e ectricity is
supp ied to the unit.
SET TEMPERATURE disp ay
This disp ays the se ected setting
temperature.
AIR DIRECTION disp ay
This disp ays the air direction.
ROOM TEMPERATURE disp ay
The temperature of the suction air is
disp ayed during operation. The
disp ay range is 8° to 39°C. The
disp ay f ashes 8°C when the actua
temperature is ess than 8° and
f ashes 39°C when the actua
temperature is greater than 39°C.
disp ay
This disp ay ights in the check mode
or when a test operation is
performed.
CHECK MODE
TEST RUN
This amp ights when the fi ter need
to be c eaned.
AIR SPEED disp ay
The se ected fan speed is disp ayed.
FILTER disp ay

6
4SPECIFICATION
2-1 Specification
Power Supp y
Starting Current
Fan ✕ No.
Air f ow (Note 2)
Externa stafic pressure
Fan motor output
Item
Power
Coo ing capacity
Heating capacity
Exterior <munse symbo >
Out dimensions
Heat exchanger
Fan
Insu ator
Air fi ter
Pipe dimensions
Drain pipe size
Noise eve
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
Coo ing
Heating
Coo ing
Heating
Height
Width
Depth
Gas side
Liquid side
PKFY-P20VAM
2,000
2,250
PKFY-P25VAM
2,500
2,800
Sing e phase ,220V-240V,50Hz
0.04
0.04
0.20
0.20
P astic munse : <2.60Y 8.66/0.69>
295
815
158
Cross fin
Linef ow fan ✕ 1
5.9-5.6-5.2-4.9
0
0.017
Po yethy ene 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
E ectric
characteristic
Note 1. Rating conditions (JIS B8615)
Coo ing :Indoor 27°C DB. 19.5°C WB
Outdoor 35°C DB. 24°C WB
Heating : Indoor 21°C DB.
Outdoor 7°C DB. 6°C WB
Note 2. Air f ow and the noise eve are indicated as High-Middium 1-Middium2-Low.

7
2-2 Electrical parts specifications
Mode
Transformer
Room temperature thermistor
Liquid pipe
thermistor
Gas pipe
thermistor
Fuse
(Indoor contro er board)
Fan motor
(with therma fuse)
Fan motor capacitor
Vane motor
(with imit switch)
Liner expansion va ve
Power supp y termina b ock
Transmission termina b ock
Symbo
T
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
(Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.2A)
Resistance:
0$C / 15k1, 10$C / 9.6k1, 20$C / 6.3k1, 25$C / 5.4k1, 30$C / 4.3k1, 40$C / 3.0k1
Resistance:
0$C/15k1, 10$C/9.6k1, 20$C/6.3k1, 25$C/5.4k1, 30$C/4.3k1, 40$C/3.0k1
250V 6.3A
4-Po e Output 17W / RC4V17
1.5+F ✕ 440V
MSFBC20A76 DC12V
DC12V Stepping motor drive
Port [3.2 (0~2000pu se) EDM-402ME
(L, N, ;) 264V 20A
(M1, M2,S ) 250V 10A
PKFY-P20VAM/PKFY-P25VAM

8
5OUTLINES AND DIMENSIONS
Unit : mm
783
C
D
A
B
CBA
D
25.5
159
407.5
328328
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
44 50
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
13
Air intake dimension
Air intake
Insta ation p ate
Knock out ho e
Insta ation space
100 or more
20 or more
20 or more
130 or more
Address board
Drain pipe
Liquid pipe F are connection 1/4F
F are connection 1/2F
Insu ation out dimention 28
Insu ation Out dimention 35 Gas pipe
Refrigrant pipe
Address board is protected by the p astic cover. For the setting, remark 1-screw using the screw driver.
Insta ation p ate
Air intake dimension
Air intake dimension
Air out et dimension
Drain pipe ength
Gas pipe
Detai of Termina b ock
Termina b ock for remote contro er
Termina b ock for remote contro er Termina b ock for power supp y address board
Air out et ang e
Air out et dimention
Air out et direction
Detai of address board
Dip swich
Termina b ock
Termina b ock for power supp y
Knock out ho e for right - hand side piping
Knock out ho e for eft - hand side piping
Knock out ho e for under piping
Liquid pipe
815
630
695
660
450
520
54
50
16
45 91.5
10
34
2.5
2.5 16
450
10
45
5
45
3
R15
R15
R15
R12
R8
R8
R8
10
24.4
116
110
60
146
295
21.5
247.5
150
158
70.3
37.4
5
2.5 60
13
80
4- 9
12- 2.8
87- 5.1 65
17
3
1
1
Note1.For the insta ation, be sure to eave some space in case there is finge at edge of the ce ing. Note2. Use the M10 or W3/8 bo t for the ista ation p ate. Note3. Refer for the specification tab e it be ow .
Detai of knock out ho e (A B C)
Connection out dimention 28
Lotary switch(part No.)
Lotary switch(se f address)
Secondry
Primary
Knock out ho e for the remote contro er wiring
Knock out ho e for the remote contro er wiring
Contro wire (30v)
: Fo ow the instruction stated at Note3 for the connection with the contro wire. : There is no termina board for cont ro er.
54 or more for eft
or eft back piping
Unit transp ant parts
pipe ho e
Position detai of the tapping screw and bats at pipe intake
Center of gravity ho e for insta ation
Air intake dimention
PKFY-P20VAM,PKFY-P25VAM

9
WIRING DIAGRAM6
PKFY-P20VAM, PKFY-P25VAM
Legend
Symbo Name
TH23 Gas pipe thermistor
(0°C / 15k1, 25°C / 5.4k1)
P.B Indoor power board
ZNR Varistor
FUSE Fuse (6.3A)
F.C Fan phase contro
TTransformer
MF Fan motor
C1 Fan motor capacitor
MV Vane motor
LEV Linear expansion va ve
Symbo Name
M.B
CN32
Indoor contro er board
Remote switch connector
CN41 HA termina — A connector
CN51 Centra y contro connector
CN52 Remote indication connector
SW2 Capacity cord switch
SW3 Function se ector
TH21 Room temperature thermistor
(0°C / 15k1, 25°C / 5.4k1)
TH22 Liquid pipe thermistor.
(0°C / 15k1, 25°C / 5.4k1)
Symbo Name
TB2
TB5
Power supp y termina b ock
Transmission termina b ock
A.B Address board
SW1 <A.B> Mode se ector
SW5 <A.B> Vo tage se ector
SW11 <A.B> 1st digit address setting
SW12 <A.B> 2nd digit address setting
SW14 <A.B> Connection No. setting
T O NEXT
INDOOR UNIT
PULL
BOX
FUSE
(15A)
BREAKER
(15A)
AC220-240V
SW5
220V 240V
BLU
WHT
BLU BLU
RED
BLK RED BLU
00
M2
M1
REMOTE CONTROLLER
DC24-30V
{
BC CONTROLLER
T O OUTDOOR UNIT
S(SHIELD)
GRN/YEL
~/N 220-240VAC 50Hz
POWER SUPPLY
N
TB2
L
MICON
BOARD
(WHT)
POWER BOARD
ADDRESS
(RED)
(WHT)
REMOTE
INDICATION
CONNECTION
NO.
1ST
DIGIT
2ND
DIGIT
3RD
DIGIT
ADDRESS
(RED)
F.C
ZNR
3
1
P.B
See fig:❈1
BLU
YEL
ORN
PNK
WHT
YEL
MF
5
TH21TH23 TH22
LEV
ORN
BLU
RED
RED
BRN
MV
LED5
0
A.B
SW14
SW11SW12
SW1
1087654321
OFF
ON 1
1
8
(RED)
ADDRESS
CN43
CN82
44
8
6.3A
250V
FUSE
AC18.4V
T
C1
CND
(RED)
(GRN)
F AN1 12
14 6
12
(BLU)
M-NET
CN2M
12
LIQUID
CN21
CN53-P
MICON
BOARD
CN35-P
1
5
M.B
POWER BOARD
CN53-M 15
3
CN35-M 1
LED4 LED3 LED2 LED1
SW2
4321
0N
0FF
SW3
10
87654
3
21
5
1
CENTRALLY
CONTROL
CN51
54
11
(WHT)
CN52 CN42
(RED)
ADDRESS
18
CN81
(RED)
INTAKE
CN20
21
(WHT)
CN60
LEV
(BLK)
GAS
CN2
(GRN)
REVOLUTION
CN33
2
61 1
6
123
CN32
REMOTE
SWITCH
(WHT)
123
1234
HA
CN41
(WHT)
(BLU)
CN5V
51
TB5
Note
1. At servicing for outdoor unit, a ways fo ow the wiring diagram of outdoor unit.
2. Symbo [S] of TB5 is the shie d wire connection.
3. Symbo s used in wiring diagram above are, /: termina b ock, [: connector, ●: direct wire connection.
4. The setting of the SW2 dip switches differs in the capacity for the detai , see the tab e be ow.
5. P ease set the switch SW5 accordng to the power supp y vo tage.
SW5 to 240V side when the power supp y is 230 and 240 vo ts.
When the power supp y is 220 vo ts, set SW5 to 220V side.
[
ON
OFF
1234
MODELS SW2
PKFY-P20VAM ON
OFF
1234
MODELS SW2
PKFY-P25VAM
<❈1>
BG79N652H01

10
7REFRIGERANT SYSTEM DIAGRAM
Strainer
(#100mesh)
Strainer
(#50mesh)
Heat exchanger
Room temperature thermistor
TH21
Gas pipe thermistor
TH23
Liquid pipe thermistor
TH22
Gas pipe
F are
Linear expansion
va ve
Gas pipe
PKFY-P20VAM, PKFY-P25VAM
{12.7 <1/2F>
Liquid pipe {6.35 <1/4F>
Mode s
Item
Refrigeration pipe size (F are connection size)
PKFY-P20VAM,PKFY-P25VAM

11
8TROUBLESHOOTING
6-1. How to check PKFY-P20VAM,PKFY-P25VAM
Room temperature
thermistor(TH21)
Liquid pipe
thermistor(TH22)
Gas pipe
thermistor(TH23)
Vane motor
Fan motor
Linear expansion
va ve
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 termina s using a tester.(Surrounding tempreture 20:.)
Disconnect the connector then measure the resistance va ve using a tester.
(Coi temperature 20°C)
(Refer to the thermistor)
Norma Abnorma
White-B ack 195'Open or short
Red-B ack
Norma
Abnorma
!At first, check if the e ectrica pressure is 12V between the
brown wire(GND) and ye ow wire(VCC).
@S ow y start running the fan. It is norma if whi e the fan rotate once,
the e ectrica pressure change from 0V to12V then go back to 0V.
If the e ectrica pressure stay at around 0V or 10V, it means the fan
motor has the defects.
200'
Norma
(1)-(5)
White-Red
150'±10%
Abnorma
Open or short
(2)-(6)
Ye ow- Brown (3)-(5)
Orange-Red (4)-(6) B ue-Brown
Norma
1-2
Red-Pink
400'±7%
Abnorma
Open or short
1-3
Red-B ue
1-4
Red-Orange
1-5
Red-Ye ow
White
Red
B ack
Brown Gray Ye ow
CN33
1
4
6
32 1
FAN1
1
2
3
4
5
6
LEV
White
Ye ow
Orange
B ue
Red
Brown
CN60
2Without disassemb ing the parts, measure the e ectrica pressure of the gray wire(Signa ine) and
brown wire (GND) whi e the power is on.
1Measure the resistance between the termina s using a tester.(Surrounding tempreture 25:.)
Norma
4.3k'~9.6k'
Abnorma
Open or short
B ue
Ye ow
Red
Orange
Pink
3
5
1
4 2
Connect pin No.

12
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for ower temperature >
Temperature (:)
Resistance (K")
4[4
3
6
5
[3
2[2
1[1
[4
[3
[2
[1
Contro er board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
B ue
Orange
Ye ow
White
M
4
6
2
3
5
1
B ue
Brown
Ye ow
Orange
Red
White
Linear expansion va ve
<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
ower temperature
Linear expansion va ve
①Operation summary of the linear expansion valve.
• Linear expansion va ve open/c ose through stepping motor after receiving the pu se signa from the indoor contro er board.
• Va ve position can be changed in proportion to the number of pu se signa .
<Connection between the indoor contro er board and the inear expasion va ve>
1
273+t
1
273
Note : Since the number of the connector at the contro er board side and the re ay connector are different, fo ow the co or of
the ead wire.

13
Output
(Phase)
Output
{1
1
ON
{2ON
{3OFF
{4OFF
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
<Output pulse signal and the valve operation>
➁Linear expansion va ve operation
➂Troub e shooting
D
A
E
B
C
Open
Extra tightning (80~100pu se)
Pu se number
2000 pu se
Opening a va ve
a the way
C ose
Va ve position (capacity)
6
5
4
3
2
1
LED1k'
Symptom Check points
Operation circuit
fai ure of the micro
processor.
Disconnect the connector on the contro er board, then
connect LED for checking.
Pu se signa wi be sent out for 10 seconds as soon as the
main switch is turn on. If there is LED with ights on or ights
off, it means the operation circuit is abnorma .
Countermeasures
Exchange the indoor
contro er board at drive
circuit fai ure.
Linear expansion
va ve mechanism is
ocked.
Va ve doesn't c ose
comp ete y
(thermistor eaking).
Wrong connection of
the connector or
contact fai ure.
To check the inear expansion va ve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in coo ing mode, then check the pipe temperature < iquid
pipe temperature> of the indoor unit by the
outdoor mu ti contro er board operation
monitor. During fan operation, inear
expansion va ve is c osed comp ete y and if
there are some eaking, detecting
temperature of the thermistor wi go ower.
If the detected temperature is much ower
than the temperature indicated in the
remote contro er, it means the va ve is not c osed a the way.
It is not necessary to exchange the inear expansion va ve, if
the eakage is sma and not making any troub e.
Thermistor
Linear
expansion
va ve
Motor wi id e and make ticking noise when motor is operated
whi e the inear expansion va ve is ocked. This ticking sound
is the sign of the abnorma ity.
Check the co or of ead wire and missing termina of the
connector.
Exchange the inear
expansion va ve.
Exchange the inear
expansion va ve.
If arge amount of
thermistor is eaked,
exchange the inear
expansion va ve.
Disconnect the connector
at the contro er board,
then check the continuity.
Measure the resistance between the each coi (red-white,
red-orange, brown-ye ow, brown-b ue) using a tester. It is
norma if the resistance is in the range of 150'+10%.
Short or breakage of
the motor coi of the
inear expansion
va ve.
C osing a va ve : 1 → 2 → 3 → 4 → 1
Opening a va ve : 4 → 3 → 2 → 1 → 4
The output pu se shift in above order.
❈ 1. When inear expasion va ve operation stops, a output phase
become OFF.
2. At phase interruption or when phase does not shift in order,
motor does not rotate smooth y and motor ock, and vibrates.
❈ When the switch is turned on, 2200 pu se c oseing va ve signa
wi be send ti it goes to Apoint in order to define the va ve
position.
When the va ve move smooth y, there is no noise or vibration
occurring from the inear expansion va ve ; however, when the
pu se number moves from Eto Aor when the va ve is ocked,
more noise can be heard than norma situation.
❈ Noise can be detected by p acing the ear against the screw
driver hand e whi e putting the screw driver to the inear
expansion va ve.

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
Fi ter crogging Provide Not provide
Fi ter sign indication 2,500hr 100hr
Air intake Not effective Not effective
Remote indication switching Thermostat ON signa indication Fan output indication
Humidifier contro Fan operation at Heating mode Heat thermostat ON is operating
Low (Note 1) Extra ow (Note 1)
Setting air f ow (Note 1) Reset to SW1-7
Auto reset function Effective Not effective
Power ON/OFF Effective Not effective
Heat pump/Coo on y Coo ing on y Heat pump
Capacity save Avai ab e Not avai ab e
Vane Avai ab e Not avai ab e
Not avai ab e Avai ab e
Vane ho izonta ang e First setting First setting
Vane coo ing imit ang e 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 Sybcoo setting temperature 15deg 10deg
ON
OFF
12345678910
ON
OFF
12345678910
ON
OFF
1234
ON
OFF
1234
PKFY-P20VAM
MODEL SW2
PKFY-P25VAM
Address board
<At de ivery>
Indoor contro er board
Indoor contro er board
<At de ivery>
SW3
Function
se ection
SW2
Capacity
code
switch
SW1
Mode
se ection
Switch Po e Function Operation by switch Remarks
Bui t-in remote contro er Indoor unit
Indoor inear expansion
va ve opening
(Note 1) SW1-7=OFF, SW1-8=ON
→Setting air f ow.
SW1-7=OFF, SW1-8=ON
→Indoor fan stop.
Set whi e the unit is off.
<At de ivery>
Set for each capacity.
Set whi e the unit is off.
(Note 1) At coo ing mode, each
ang e can be used on y 1
hour.
Reading change of LEV opening
on reversion of after defrosting
Air f ow at heat
thermostat OFF

15
0
5
9
4
8
3
7
2
6
1
SW12
10
0
5
9
4
8
3
7
2
6
1
SW11
1
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
0
5
9
4
8
3
7
2
6
1
SW12
0
5
9
4
8
3
7
2
6
1
SW11
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
Address board
Address board
Operation by switchSwitch Remarks
<At de ivery>
<At de ivery>
SW11
1st digit
address
setting
SW12
2st digit
address
setting
Rotary switch
SW14
Connector
No.
Setting
SW5
Vo tage
se ection
Rotary switch
Address setting shou d be done when network
remote contro er (PAR-F25MA) is being used.
This is the switch to be used when the indoor
unit is operated with R2, R3 series outdoor
unit as a set.
If the unit is used at the 230V or 240V area,
set the vo tage to 240V.
If the unit is used at the 220V, set the vo tage
to 220V.
Address can be set whi e the
unit is stopped.
Address board
2
220V 240V
<At de ivery>
220V 240V

16
DISASSEMBLY PROCEDURE
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM
THE INSTALLATION PLATE
When there is removing p ate
(1) Remove the corner box at right ower side of the indoor
unit.
(2) Insert the removing p ate at the back side of the corner box
to remove the indoor unit.
(3) Remove the hook by pu ing the ower side of the indoor unit
down as shown in the figure 1.
When there is no removing p ate or it can not be used for some
reason.
(1) Remove the front pane .
(2) Insert the screw driver to the corner ho e at both eft and
right side as shown in the figure 2.
(3) Push it up then, pu down the ower side of indoor unit and
remove the hook.
Indoor unit
removing p ate
Insert
the edge Pu
Push
Corner ho e
12
Push Down
Be carefu
not to damage
the airf ow
adjustment
p ate with the
screw driver.
PKFY-P25VAM Be carefu on removing heavy parts.
Figure 1 Figure 2
2. REMOVING THE FRONT PANEL
❈Before removing the front pane , eave the open space at
upper side of air f ow adjustment p ate approximate y 2 to 3
cm.
(1) Remove the screw caps then remove the set screws.
(Refer to the photo 1)
(2) Remove the eft side of the front pane , then right side.
(3) After removing the ower side of the front pane a itt e,
remove it as pu ing the upper side toward you.
❈P ease pay attention to the nozz e assemb e.
INSTALLING THE FRONT PANEL
(1) Insert the ower side of the front pane under the air
adjusment p ate.
(2) Set the upper side of the front pane .
(3) Set the ower side of the front pane then fix it with the
screws.
(4) Press the area indicated as arrow sign and set it to the air
conditioner unit.
Push
4
13
2
Photo 1
Figure 3
Front pane
Set screws
Airf ow adjustment p ate

17
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
3. REMOVING THE INDOOR MICRO CONTROLLER BOARD
AND INDOOR POWER BOARD
(1) Remove the front pane (Refer to 2).
(2) Remove the e ectrica box cover (screw 4 ✕10)
(Refer to the photo 2).
INDOOR MICRO CONTROLLER BOARD
(1) Disconnect the fo owing connectors on the indoor micro
contro er board.
(connector in front of)
●CN60, CN51, CN3, CN29, CN21
●CN42, CN41, CN20
(2) Pu out the indoor micro contro er board toward you, then
disconnect the rest of connectors.
●CN-53-M, CN35-M (See the photo 3)
INDOOR POWER BOARD
(1) Disconnect the fo owing connectors on the indoor power
board.
●FAN1, CN-53-P, CN35-P
(2) Remove the screws of the indoor power board, then pu out
the indoor power board toward you. (See the photo 3)
Photo 2 E ectrica parts box cover
Screw caps
E ectrica parts box
Photo 3 Indoor micro contro er board
Indoor power
board
Indoor power
board
4. REMOVING THE ELECTRICAL PARTS BOX
(1) Remove the front pane (Refer to 2)
(2) Remove the e ectrica parts box cover.
(3) Pu the nozz e assemb e toward you as opening the catch
of the nozz e assemb e.
(4) Disconnect the indoor/outdoor connector.
(5) Disconnect the fo owing connector on the indoor micro con
tro er 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) Pu the disconnected ead wire out from the e ectrica parts
box.
(9) Push up the upper fixture catch to remove the box, then pu
the ower fixture and remove it from the box fixture.
Photo 4 Indoor micro
contro er board fixture (upper)
Indoor power
board
fixture ( ower)
Ground wire set screw E ectrica parts box
E ectrica parts box

18
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
5. REMOVING THE NOZZLE ASSEMBLE
(1) Remove the front pane (Refer to 2).
(2) Remove the e ectrica parts box cover.
(3) Disconnect the connector (CN5V) on the indoor micro con
tro er board.
(4) After unhook the right side of the corner box, press the
upper eft side and remove the corner box.
(5) Remove the nozz e assemb e from the fixture.
(See the photo 5)
(6) Remove the drain hose.
Photo 5
Heat exchanger E ectrica parts box
fixture
Drain hose
6. REMOVING THE LINEFLOW FAN AND THE FAN MOTOR
(1) Remove the front pane (Refer to 2).
(2) Remove the nozz e assemb ing (Refer to 5).
(3) Remove the e ectrica parts box.
(4) Remove the fixture whi e pressing the right side of motor fix
ture catch (See the photo 6).
(5) Remove the eft side of the motor fixture.
(6) Loosen the screw that fixes the ine f ow fan to the fan
motor, then remove the fan motor by s iding it to the right
side.
(See the photo 6)
(7) Pu the eft-hand side of the heat exchanger toward you.
(See the photo 7)
(8) Remove the inef ow fan.
Photo 6
Heat exchanger Fan motor
Photo 7 Heat exchanger
7. REMOVING THE VANE MOTOR
(1) Remove the front pane .
(2) Remove the screw of the e ectrica 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
contro er board.
Photo 8
Heat exchanger
Vane motor
Nozz e assemb e
8. REMOVING THE LIQUID PIPE THERMISTOR AND GAS
PIPE THERMISTOR
(1) Remove the front pane (Refer to 2).
(2) Remove the e ectrica box cover.
(3) Remove the pipe cover.
(4) Cut the wiring fixed band.
(5) Remove the iquid pipe thermistor and gas pipe thermistor.
(See the photo )
(6) Disconnect the connector (N29) (CN21) on the indoor micro
contro er board.
Photo
Heat exchanger
Drain hose
fixture set screw
set screws Drain hose
Nozz e assemb e
fixture ( eft)
Nozz e assemb e
fixture
Line f ow fan
Heat exchanger
fixture ( eft)
Vane motor connect screw
Liquid pipe
thermistor
Gas pipe thermistor
E ectrica parts box
fixture (right)

19
PARTS LIST
10
PANEL PARTS
PKFY-P20VAM
PKFY-P25VAM
1
2
3
4
5
6
7
8
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-P20VAM
PKFY-P25VAM
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
(DT25C174H03)
3PCS/SET
(BC7 R7 8H02)
R01 22A 651
R01 22A 6 1
—
R01 22A 500
R01 22A 635
T7W A00 658
R01 22A 808
R01 22A 0 6
R01 22A 054
—

20
ELECTRICAL PARTS
PKFY-P20VAM,PKFY-P25VAM
1
2
3
4
5
6
7
8
11
12
13
14
15
16
17
18
1
20
21
22
23
24
NOZZLE
AUTO VANE
DRAIN HOSE
FAN MOTOR
RUBBER MOUNT
BEARING MOUNT
SLEEVE BEARING
I
NDOOR 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.)
Wiring
Diagram
Symbol
Recom-
mended
Q'ty Unit 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 W 310
T7W B02 313
—
—
T7W A10 716
T7W A11 716
R01 3W 202
R01 22A 202
R01 22A 223
R01 22A 114
T7W 520 23
T7W B01 2 4
R01 22A 126
R01 W 202
T7W B00 713
T7W A00 305
—
T7W B00 675
10
FILTER
CHECK MODE
TEST RUN
22
21
20
1
24