Mitsubishi Electric PKFY-P32VGM-A Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. SAFETY PRECAUTION·····························2
2. PART NAMES AND FUNCTIONS ·············4
3. SPECIFICATIONS······································6
4. OUTLINES AND DIMENSIONS·················8
5. WIRING DIAGRAM····································9
6. REFRIGERANT SYSTEM DIAGRAM······10
7. TROUBLE SHOOTING ····························11
8. DISASSEMBLY PROCEDURE················16
9. PARTS LIST·············································19
<Indoor unit>
[Model names] [Service Ref.]
PKFY-P32VGM-A PKFY-P32VGM-A
PKFY-P40VGM-A PKFY-P40VGM-A
PKFY-P50VGM-A PKFY-P50VGM-A
No. OC250
Wall Mounted
Series PKFY
Indoor unit
R407C /R22
2001
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2
1SAFETY PRECAUTION
Cautions for using with the outdoor unit which adopts R407C refrigerant.
· Do not use the existing refrigerant piping.
-The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant
deterioration of the new unit.
· Use “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.
· Store the piping to be used during installation indoors with keep both ends 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 ESTR , ETHER or HAB as the lubricant to coat flares and flange connection parts.
Use liquid refrigerant to seal the system.
-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance
may drop.
· Do not use a refrigerant other than R407C.
-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricant deterioration.
· Use a vacuum pump with a reverse flow check valve.
-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration.
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3
[3] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
[1] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a or R407C.
5Adapter for reverse flow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
[2] Notice on repair 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.
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4
2PART NAMES AND FUNCTIONS
● Indoor Unit
PKFY-P32VGM-A
PKFY-P40VGM-A
PKFY-P50VGM-A
● Remote controller [PAR-20MAA]
● Once the controls are set, the same operation mode can be repeated by simply pressing the on / off button.
● Operation buttons
Air intake Air intake grille
Filter
Air outlet
Guide vane
Auto vane
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
Press this button to switch the cooler,
electronic dry (dehumidify), automatic
and heater modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1:units
Setting range
Cooler 19:to 30:
Heater 17:to 28:
TEMP. ADJUSTMENT button
This switches between continuous
operation and the timer operation.
TIMER button
This switches between the operation
and stop modes each time it is pressed.
The lamp on this button lights during
operation.
ON/OFF button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
CHECK-TEST RUN button
This switch the horizontal fan motion
ON and OFF.
(Not available for this model.)
LOUVER button
This adjusts the vertical angle of the
ventilation.
AIR DIRECTION button
This resets the filter service indication
display
FILTER button
This sets the current time, start time
and stop time.
TIME SETTING button
This sets the ventilation fan speed.
AIR SPEED button
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5
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button
and TEMP. adjustment button do not operate.
●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0” indication disappear then start the operation.
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
TIMER display
This indicates when the continuous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
The [STANDBY] symbol is only
displayed from the time the heating
operation starts unit the heated air
begins to blow.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
CLOCK display
The current time , start time and stop
time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
●Display
In this display example on the bot-
tom left, a condition where all dis-
play lamps light is shown for expla-
nation purposes although this differs
from actual operation.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
POWER display
This lamp lights when electricity is
supplied to the unit.
SET TEMPERATURE display
This displays the selected setting
temperature.
AIR DIRECTION display
This displays the air direction.
ROOM TEMPERATURE display
The temperature of the suction air
is displayed during operation. The
display range is 8°C to 39°C. The
display flashes 8°C when the actual
temperature is less than 8°C and
flashes 39°C when the actual tem-
perature is greater than 39°C.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
This lamp lights when the filter need
to be cleaned.
AIR SPEED display
The selected fan speed is displayed.
FILTER display
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
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6
3SPECIFICATIONS
3-1. Specification
Item
V•Hz
kW
kW
kW
kW
A
A
—
mm
mm
mm
—
—
k/min
Pa
kW
—
—
[mm(in.)
[mm(in.)
[mm
dB
kg
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan ✕No
Air flow W2
Pipe
dimensions
Unit drain pipe size
Noise level W2
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
F
a
n
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PKFY-P32VGM-A PKFY-P40VGM-A PKFY-P50VGM-A
Single phase 220V-230V-240V · 50Hz / 220V · 60Hz
3.6
4.0
4.5
5.0
0.07
0.07
0.32
0.32
Plastic , white : <0.70Y 8.59/0.97>
340
990
235
Cross fin (Aluminum plate fin and copper tube)
Linflow fan ✕1
0
0.03
Polyethylene sheet
PP honey comb
O.D.20 (PVC pipe VP-20 connectable)
16
5.6
6.3
12-11-10-9
15.88(5/8")
9.52(3/8")
43-40-37-34
11.5-10.5-9.5-8
12.7(1/2")
6.35(1/4")
41-38-36-33
Note 1.Rating conditions
Cooling :Indoor D.B. 27°C W.B. 19.0°C
Outdoor D.B. 35°C W.B. 24°C
Heating : Indoor D.B. 20°C
Outdoor D.B. 7°C W.B. 6°C
W2.Air flow and the noise level are indicated as High - Middium1 - Middium2 - Low .
OC250.qxp 2/24/01 9:38 AM Page 6

7
3-2. Electrical parts specifications
Room temperature thermistor
Liquid pipe temperature thermistor
Gas pipe temperature thermistor
Fuse
(Indoor controller board)
Fan motor
(with inner-thermostat)
Fan motor capacitor
Vane motor
Linear expansion valve
Power supply terminal block
Transmission terminal block
MA remote controller terminal block
Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
TB15
PKFY-P32VGM-A PKFY-P40VGM-A
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.2kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.2kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.2kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
250V 6.3A
PM4V30-K 220-240V/220V , 50/60Hz
4 pole Output 30W
OFF 125±5;
2.0µF 440V
MP 35 EA DC12V
DC12V Stepping motor drive
Port dimension [3.2 (0 ~ 2000pulse)
(L, N, ;) 330V 30A
(M1, M2, S) 250V 20A
(1,2) 250V 10A
Model
Parts name PKFY-P50VGM-A
Inner-thermostat
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8
4 OUTLINES AND DIMENSIONS
Knock out hole for right piping Refrigerant pipe.Drain pipe. Wiring hole
Gas pipe
Liquid pipe
Address board
Filter grip
21
21
Knock out hole for under piping Refrigerant piping.Drain pipe. Wiring hole
Service panel (Power supply access)
5/8F
Gas pipe
1/2F
Liquid pipe
3/8F 1/4F
50 32 , 40 Model
( Flexible hose total length 800 ) ( Right side piping
installation )
( Left side piping installation )
Drain pipe (VP-20)
(Front view( to open the grille ))
12 - Louvers ( manual )
Air outlet
(Lower side)
Auto vane
(Left side) (Front view)
Air intake
Air intake
Air intake
Air intake
Knock out hole for left piping Refrigerant pipe.Drain pipe.Wiring hole.
(Right side)
35
700 153
449 86
581 54
31
280
80
60
70
245
50
395400
190
60
70 35
160 40
705 235
Less than 15
198
70
245
60
235
53
340
715 225
340 80 280 233
990
79
Unit : mm
PKFY- P32VGM-A
PKFY- P40VGM-A
PKFY- P50VGM-A
Installation plate balance point hole
49 - [5 hole for tapping screw
Knock out hole for right-rear piping
Right-rear piping hole
( Necessary clearance for Unit installation )
R52.5
R52.5
R52.5 R52.5
Unit center
Right side
Allowing clearances Front view
W1Sleeves are available on the market. W2This size shows the lower end of through hole.
[90 ~ [100 [75 ~ [80
[90 [75
Through holeSleeve W1
50 32 , 40 Model
Details of installation plate
14 - [14 hole for bolts
Left-rear piping hole
Knock out hole for left-rear piping
Less than 130
50 or more 150 or more
180 or more
30 or more
425
420
170
190
210
230
0
322 0 35 55 80 130 190 230 272 310 0
35
95
150
205
260
320
345
495
20
75
135
190
245
300
360
405
495
32
0
w2
OC250.qxp 2/24/01 9:17 AM Page 8

9
WIRING DIAGRAM
5
PKFY-P32VGM-A , PKFY-P40VGM-A , PKFY-P50VGM-A
(GRN)
LED2
5432
TH22
1
4
1 1234567891023456
6
68
LEV
TH21 TH23
0N
SW4
0N SW3SW2
0FF 0FF
P.B
TRANS CN2S
DC13.1V
(RED)
AC220v~240V
CNSK
X4
CNDK CN2D WHT
ORN
ORN
1CN41 4
135151
X4 LED1
FAN
F.C
CND FUSE
250V
6.3A
HA
ZNR
CN51
CN31
I.B
C1
CN3A
DRAIN
{
TB15 1
2
{
MV
CN6V
VANE
(GRN) ADDRESS
(RED)
CN81 ADDRESS
(RED)
CN42
See fig:w1
REMOTE
INDICATION
CN52
CENTRALLY
CONTROL
(WHT) (WHT)
LEV
CN60
(WHT)
CN32
REMOTE
SWITCH
(RED)
CN20
INTAKE
CN21
LIQUID
(WHT)
CN29
GAS
(BLK)
CN2M
M-NET
(BLU)
(BLU)
BLU
BLU
(WHT) (WHT) (WHT) BLK
(WHT)
(RED) (RED)
(WHT)
RED
WHT
BLK
WHT
BLK
PIN
WHT
YLW
YLW
ORN
ORN
BLU
BLU
RED
RED
BRN
BRN
CONTROLLER
DC8.7-13V
TO MA-REMOTE
M1
M2
S(SHIELD)
DC24-30V
BC CONTROLLER
RED
BLU
REMOTE CONTROLLER
TO OUTDOOR UNIT
~/N 220V 60Hz
BREAKER
(15A)
FUSE(15A)
~/N 220-230-240V 50Hz
TO NEXT INDOOR UNIT
PULL BOX
N
L
TB5
TB2
GRN/YLW
BLU
RED
1221 21
432165 87654321 4321
321
MF
21 3
315
654321
2
1
13
2
1
3
1
2
31
1
2
31 2
A.B
SWC
SW5
220V 240V
2ND
DIGIT
CN82
ADDRESS
(RED)
ON
OFF12345678910
SW1
SW12SW11
3RD
DIGIT
00
1ST
DIGIT
CONNECTION
NO.
SW14
0
ADDRESS
(RED)
CN43
4
3
2
18
7
6
5
4
3
2
1
SW3
21
OFF
ON
345678910
PKFY-P50VGM-A ON
OFF 123456
<w1>
PKFY-P40VGM-A 654321
OFF
ON 654321
OFF
ON
PKFY-P32VGM-A
Models SW2
54321
OFF
1098756
ON
OFF 1234
1098756
ON
OFF 1234 54321
OFF
ON
54321
OFF
ON
ON
SW4
POWER SUPPLY
P.B Indoor power board
Power supply for MA-Remote controller
on →lamp is lit
Main power supply(Indoor unit:220-240V)
power on → lamp is lit
LED on indoor board for service
Power supply for
MA-Remote controller
Function
Main power supply
Meaning
LED2
LED1
Mark
NameNameName SymbolSymbolSymbol
Option selector
SWC
Linear expansion valve
LEV
Varistor
ZNR
Model selection
Capacity code
Mode selection
Remote indication
Centrally control
Remote switch
I.B Indoor controller board
Connector
CN32
CN51
CN52
Switch
SW2
SW3
SW4
Voltage selection
Address setting 2nd digit
Connection No.
Address setting 1st digit
Mode selection
Power supply
Vane motor
Switch
Terminal
block
SW5
A.B
SW1
SW11
SW12
SW14
TB2
MV
Capacitor(fan motor)
C1
FUSE (6.3A)
Pipe temperature,detection/Gas
Pipe temperature,detection/Liguid
Room temperature ,detection
Fan phase control
Thermistor
(0°C/15t,25°C/5.4t)
(0°c/15t,25°c/5.4t)
(0°c/15t,25°c/5.4t)
F.C
FUSE
TH21
TH22
TH23
Aux.Relay Aux.Relay(Fan motor)
X4
Fan motor(with inner thermo)
MF
TB5 Transmission
TB15 MA-remote controller
CN41 HA terminal-A
Circuit board (Address)
(Remote controller wire is non-polar.)
7.
In case of using MA-Remote controller,please connect to TB15.
In case of using M-NET,please connect to TB5.(Transmission line is non-polar.)
6.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
Please set the switch SW5 according to the power supply voltage.
1. At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.
2.
Symbol[S] of TB5 is the shield wire connection.
3.
4.
The setting of the SW2 dip switches differs in the capacity
for the detail,refer to the fig:w1.
Note
5.
When the power supply is 220 volts,set SW5 to 220V side.
Symbols used in wiring diagram above are, :terminal block, :connector.
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10
6 REFRIGERANT SYSTEM DIAGRAM
Strainer (#50mesh)
Strainer (#100mesh)
Strainer (#100mesh)
Heat exchanger
Room temperature thermistor
TH21
Gas pipe temperature
thermistor TH23
Liquid pipe temperature
thermistor TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
PKFY-P32VGM-A
PKFY-P40VGM-A
PKFY-P50VGM-A
Gas pipe
PKFY-P32VGM-A, PKFY-P40VGM-A
{12.7 (1/2”)
Liquid pipe {6.35 (1/4”)
Capacity
Item PKFY-P50VGM-A
[15.88(5/8”)
[9.52(3/8”)
OC250.qxp 2/24/01 9:17 AM Page 10

11
TROUBLE SHOOTING
7
7-1. How to check PKFY-P32VGM-A , PKFY-P40VGM-A, PKFY-P50VGM-A
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
Vane motor
Fan motor
Linear expansion
valve
Disconnect the connector then measure the resistance with the tester.
(Surrounding temperature 10°C~30°C)
Measure the resistance between the terminals using the tester.
(Surrounding temperature 20°C~30°C)
Disconnect the connector then measure the resistance with the tester.
(Surrounding temperature 20°C)
Normal
4.3k'~9.6k'
Abnormal
Open or short
Normal Abnormal
186'~ 214'Open or short
Motor terminal or
relay connector Normal Abnormal
Red - Black 141.2ΩOpen or short
White - Black 131.5Ω
Normal
(1)-(5)
White-Red 150'±10%
Abnormal
Open or short
(2)-(6)
Yellow-Brown
(3)-(5)
Orange-Red (4)-(6) Blue-Brown
1
3
2
2
3
1
Red
White
Black
Fan
Protector
Orange
Red
White
Blue
Brown
Yellow
3
6
15
4
2
M
Parts name Check method
Measure the resistance between the terminals using the tester.
(Surrounding temperature 20°C)
M
Blue
Brown
Yellow
Orange
Red
Pink
4
5
2
361
Red - Pink
Connector
Brown - Yellow
Brown - Blue
Red - Orange
(Refer to the next page for a detail.)
(Refer to the next
page for a detail.)
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12
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (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
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
<Thermistor Characteristic graph>
Room temperature thermistor(TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
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
①Operation 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.
1
273+t 1
273
<Connection between the indoor controller board and the linear expansion valve>
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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 valve operation
➂Trouble shooting
D
A
E
B
C
Open
Extra tightning (80~100pulse)
Pulse number
2000 pulse
Opening a valve
all the way
Close
Valve position (capacity)
6
5
4
3
2
1
LED1T
Symptom Check points
Operation circuit fail-
ure of the micro
processor.
Disconnect the connector on the controller board, then con-
nect LED for checking.
Pulse signal will be sent out for 10 seconds as soon as the
main switch is turned on. If there is LED with lights on or
lights off, it means the operation circuit is abnormal.
Countermeasures
Exchange the indoor con-
troller board at drive circuit
failure.
Linear expansion
valve mechanism is
locked.
Valve doesn't close
completely (thermis-
tor leaking).
Wrong connection of
the connector or
contact failure.
To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature <liquid
pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear
expansion valve is closed completely and if
there are some leaking, detecting tempera-
ture of the thermistor will go lower. If the
detected temperature is much lower than
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, if the
leakage is small and not making any trouble.
Liquid pipe
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 the linear
expansion vale.
Exchange the linear
expansion valve.
If large amount of thermis-
tor is leaked, exchange the
linear expansion valve.
Disconnect the connector
at 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 is
normal if the resistance is in the range of 150'+10%.
Short or breakage of
the motor coil of the
linear expansion
valve.
Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shifts 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 locks and vibrates.
❈ When the switch is turned on, 2200 pulse closing valve signal will
be send till it goes to ⁄
Apoint in order to define the valve posi-
tion.
When the valve move smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from ⁄
Eto ⁄ Aor when the valve is locked,
more noise can be heard than normal situation.
❈ Noise can be detected by placing the ear against the screw dri-
ver handle while putting the screw driver to the linear expansion
valve.
OC250.qxp 2/24/01 9:58 AM Page 13

14
7-2. FUNCTION OF DIPSWITCH
PKFY-P32VGM-A , PKFY-P40VGM-A , PKFY-P50VGM-A
1
2
3
4
5
6
7
8
9
10
1~6
1
2
3
4
5
6
7
8
9
10
1~5
Thermistor<Intake temperature
detection>position
ON OFF
Filter clogging detection Provided Not provided
Filter cleaning sign 2500hr 100hr
Air intake Effective Not effective
Remote indication switching Thermostat ON signal indication Fan output indication
Humidifier control Always operated while the heating mode w1 Operated depends on the condition w2
Air flow set in case of Fix to LOW w3 Fix to EXTRA LOW w3
Heat thermostat OFF
Depends on setting Remote controller w3 Depends on SW1-7
Auto restart Effective Not effective
Power source ON/OFF Effective Not effective
Heat pump/Cooling only Cooling only models Heat pump models
Louver Available Not available
Vane Available Not available
Vane swing function Available Not available
Vane horizontal angle Second setting First setting
Vane cooling limit angle setting w4 Horizontal angle Down B,C
Effective Not effective
Heater 4deg up Not effective Effective
Target Superheat setting w5 9degrees 6degrees
Target Sub cool setting 15degrees 10degrees
ON
OFF 12345
ON
OFF 12345678910
ON
OFF 123456
MODELS SW2 MODELS SW2 MODELS SW2
PKFY-
P32VGM-A PKFY- P40VGM-A
Address board
<At delivery>
Indoor controller board
Indoor controller board
Indoor controller board
<At delivery>
SW4
Unit
Selection
SW3
Function
Selection
SW2
Capacity
code
setting
SW1
Mode
Selection
Switch Pole Function
Operation by switch Remarks
Built-in remote controller Indoor unit
Indoor linear expansion
valve opening
NOTE:
w1 At Heating mode, fan
operating.
w2 At Heating mode, operat-
ing heat thermostat ON.
w3 SW1-7=OFF, SW1-8=ON
→Setting air flow.
SW1-7=ON, 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:
w4 At cooling mode, each
angle can be used only 1
hour.
w5 sw3-9 setting
PKFY-P32VGM-A = OFF
PKFY-P40VGM-A = ON
PKFY-P50VGM-A = OFF
Set while the unit is off.
PKFY-
P50VGM-A
ON
OFF 123456
ON
OFF 123456
ON
OFF 12345678910
<At delivery>
ON
OFF 12345
OC250.qxp 2/24/01 9:17 AM Page 14

15
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
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 Pole Remarks
<At delivery>
<At delivery>
SW11
1st digit
address
setting
SW12
2nd digit
address
setting
Rotary switch
SW14
Connect
ion No.
setting
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.
220V 240V
220V 240V
Address board
<At delivery>
2
SW5
Voltage
Selection
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
to 220V.
Address can be set while the
unit is stopped.
10 1
OC250.qxp 2/24/01 9:17 AM Page 15

16
8DISASSEMBLY PROCEDURE
PKFY-P40VGM-A
OPERATION PROCEDURE PHOTOS & ILLUSTRATION
1. REMOVE THE LOWER SIDE OF THE INDOOR UNIT FROM
THE INSTALLATION PLATE
(1) Remove the left / right corner box of the indoor unit.
(2) Hold and pull down the lower and both ends of the indoor
unit, and remove the ▼section from the square hole.
(Refer to the figure 2.1)
Or remove the front panel and push the ▼ section down
by using alankey ,etc. from the front side.
(Refer to the figure 2.2).
(3) Unhook the top of the indoor unit from the back plate catch.
2. REMOVING THE FRONT PANEL
(1) Open the front grille.
(2) Remove the terminal block cover with a screw.
(3) Remove the screw 3caps then remove the set 3screws.
(4) After removing the lower side of the front panel a little,
remove it as pulling toward upper.
3. REMOVING THE INDOOR CONTROLLER BOARD
(1) Remove the terminal block cover.
(2) Remove the front panel. (see the photo 1)
(3) Remove the electrical parts box(2screws).
(4) Remove the electrical parts box cover(1screw).
(5) Disconnect the connector on the indoor controller board and
remove the controller board by Pulling up the hook of the
controller case.
wTo smooth works, hang the side hooks of the electrical
parts box on the hook of the motor cover.
(see the photo 3)
(Figure 1)
(Figure2.1)
(Figure 3)
(Photo 1)
(Photo 2)
(Figure 2.2)
Square hole Up Down
Hook
Square hole
Hook
Terminal block cover
Front grille
Front
panel
Set screw
Set screw
Electrical parts
box
Set screw
Motor cover
Electrical parts
box hook w
(Photo 3)
Hook
Electrical parts box
Controller case
Indoor control
p.c.board
OC250.qxp 2/24/01 9:17 AM Page 16

17
OPERATION PROCEDURE PHOTOS & ILLUSTRATION
4. REMOVING THE VANE MOTOR
(1) Disconnect the connector CN6V on the indoor controller
board.
(2) Remove the 2screws of the vane motor, disconnect the
lead wire and remove the vane motor from the shaft.
(Photo 4)
(Photo 5)
(Photo 6)
(Photo 7)
(Photo 8)
7. REMOVING THE ELECTRICAL PARTS BOX
(1) Remove the terminal block cover.
(2) Remove the front panel.(see the photo 1)
(3) Disconnect the vane motor connector.
(4) Disconnect the fan motor connector from the fan motor.
(5) Remove the liquid / gas pipe thermistor.(see the photo 5)
(6) Remove the electrical parts box (2screws).
Nozzle
assemble Set screws
Lead wire
Van motor
5. REMOVING THE THERMISTOR
(1) Removing the room thermistor TH21.
1Disconnect the connector CN20<red> on the indoor
controller board.
2Remove the room thermistor from the holder.
(2) Removing the liquid pipe thermistor TH22.
1Disconnect the connector CN21<white> on indoor con-
troller board.
2Remove the liquid pipe thermistor with set to the pipe.
(3) Removing the gas pipe thermistor TH23.
1Disconnect the connector CN29<black> on indoor
controller board.
2Remove the gas pipe thermistor with set to the pipe. Electrical
parts box
Liquid
thermistor
Room
thermistor
Gas pipe
thermistor
6. REMOVING THE NOZZLE ASSEMBLE
(1) Disconnect the connector CN6V on the indoor controller
.board.
(2) Disconnect the lead wire of the vane motor.
(3) Remove the corner cover.
(4) Pull the drain hose out from the nozzle assemble.
(5) Unhook the hook of the lower nozzle assemble and
pull the nozzle assemble toward you,then remove the
nozzle assemble by sliding it down.
Nozzle assemble
Hook Drain hose
Corner cover
Liquid pipe
thermistor
Fan motor connector
Vane motor
connector
Electrical
parts box
8. REMOVING THE FAN MOTOR
(1) Remove the terminal block cover.
(2) Remove the front panel.(see the photo 1)
(3) Remove the electrical parts box.(see the photo 7)
(4) Remove the nozzle assemble.(see the photo 6)
(5) Remove the fan motor leg fixing 3screws.
(6) Unscrew the set screws using by alankey and remove it by
sliding the fan motor to right.
(7) Remove the 4screws and remove the motor cover from the
fan motor leg.
(Photo 9)
screws
Set
screw Fan motor
Motor cover
motor
leg
OC250.qxp 2/24/01 9:17 AM Page 17

18
9. REMOVING THE LINE FLOW FAN
(1) Remove the terminal block cover.
(2) Remove the front panel.(see the photo 1)
(3) Remove the electrical parts box.(see the photo 7)
(4) Remove the nozzle assembly.(see the photo 6)
(5) Remove the fan motor.(see the photo 8)
(6) Remove the pipe fixture with 2screws.(see the photo11)
(7) Remove the left / right screws of the heat exchanger and
pull the left-hand side up.
(8) Remove the 2screws by sliding it toward you remove the
fixture(fixing bearing).
wThe fan motor is removable first , when the fan
removing is hard.
wWhen resetting the fan to the fan motor.
Locate and fix the shaft after installing the fan.
(Photo10)
Heat exchanger
Set screws
Fixture(fixing bearing)
10. REMOVING THE HEAT EXCHANGER
(1) Remove the terminal block cover.
(2) Remove the front panel.(see the photo 1)
(3) Remove the electrical parts box.(see the photo 7)
(4) Remove the corner box.
(5) Remove the nozzle assemble.(see the photo 6)
(6) Remove the 2screws and the pipe fixture.
(7) Remove the 2screws and heat exchanger.
(Photo 11)
Heat exchanger
Set screw
Pipe fixture Set screws
OPERATION PROCEDURE PHOTOS & ILLUSTRATION
OC250.qxp 2/24/01 9:17 AM Page 18

19
PARTS LIST
9
STRUCTURAL PARTS
PKFY-P32VGM-A
PKFY-P40VGM-A
PKFY-P50VGM-A
1
2
3
4
5
6
7
8
9
10
11
12
13
1
1
1
2
1
3
1
1
1
1
1
1
1
No.
Parts No. Parts Name Specifications PKFY-
P32/P40/P50VGM-A
Remarks
(Drawing No.)
Wiring
Diagram
Symbol
Recom-
mended
Q'ty
Unit
Amount
Price
R01 07Y 651
R01 07Y 092
R01 07Y 691
R01 A16 500
R01 07Y 002
R01 07Y 096
R01 85Y 304
T7W B01 294
R01 07Y 658
R01 07Y 635
R01 07Y 808
R01 07Y 623
R01 09Y 658
FRONT PANEL
VANE SLEEVE
FRONT GRILLE
AIR FILTER
AUTO VANE
SCREW CAP
ADDRESS CABLE
ADDRESS BOARD
CORNER COVER
BOX ASSEMBLY
BACK PLATE
UNDER COVER
CORNER COVER
A.B
36
13
47
12
9
11
10
1
8
5
2
OC250.qxp 2/24/01 9:17 AM Page 19

ELECTRICAL PARTS
PKFY-P32VGM-A
PKFY-P40VGM-A
PKFY-P50VGM-A
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STANDBY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
228
29
No.
Parts No. Parts Name Specifications Remarks
(Drawing No.)
Wiring
Diagram
Symbo l
Recom-
mended
Q'ty
Unit
Amount
PKFY-
P40VGM
-A
P32VGM
-A
Price
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
1
1
1
1
1
1
1
1
2
10
4
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
2
10
4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
MF
MV
TB2
TB5
TB15
C1
P.B
I.B
FUSE
TH21
TH22
TH23
LEV
P50VGM
-A
1
1
1
1
1
1
1
1
1
2
10
4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
3P(L , N ,;)
3P(M1,M2,S)
2P(1,2)
2.0= 440V
250V 6.3A
PAR-20MAA
T7W A01 762
R01 E25 480
R01 E26 480
R01 E27 480
R01 07Y 114
R01 005 103
R01 07Y 102
R01 07Y 106
T7W A00 675
R01 07Y 524
R01 07Y 530
R01 07Y 059
R01 07Y 038
R01 09Y 038
R01 E02 223
R01 07Y 527
R01 07Y 135
R01 07Y 105
T7W 521 716
T7W E00 716
R01 556 246
R01 588 255
R01 E02 313
T7W E10 310
T7W 520 239
R01 E26 202
R01 E28 202
R01 E03 202
R01 07Y 130
R01 E27 401
—
FAN MOTOR
HEAT EXCHANGER
HEAT EXCHANGER
HEAT EXCHANGER
LINE FLOW FAN
SLEEVE BEARING
BEARING MOUNT
BEARING SUPPORT
FAN GUARD
DRAIN PLUG
NOZZLE ASSY
ARM
GUIDE VANE
GUIDE VANE
VANE MOTOR
DRAIN HOSE
MOTOR COVER
RUBBER MOUNT
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
RUN CAPACITOR
POWER BOARD
CONTROLLER BOARD
FUSE
ROOM THERMISTOR
LIQUID PIPE THERMISTOR
GAS PIPE THERMISTOR
MOTOR SUPPORT
LINEAR EXPANSION VALVE
REMOTE CONTROLLER
11 13 14 15
1
22
3
16
5
4
6
27
9
12
23
8
1817 20
242526
21
10
7
19
cCopyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Distributed in Feb. 2001. No.OC250 PDF 810
Made in Japan New publication, effective Feb. 2001.
Specifications subject to change without notice
HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN
OC250.qxp 2/24/01 9:17 AM Page 20