Mitsubishi Electric PKFY Series 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>
PKFY-P32VGM
PKFY-P40VGM
PKFY-P50VGM
No. OC179
REVISED EDITION-B
[ Model names ]
Indoor unit
[ Service Ref. ]
PKFY-P32VGM
PKFY-P40VGM
PKFY-P50VGM
February 2012
Revision:
• The indicated No. of CORNER
COVER (page 19) in the illus-
tration have been corrected in
REVISED EDITION-B.
• Some descriptions have been
modified.
• Please void OC179
REVISED EDITION-A.
R407C R22

2
1SAFETY PRECAUTION
Cautions for units utilizing refrigerant R407C
CAUTIONS RELATED TO NEW 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.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to charge 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.
Store the piping to be used indoors during
installation and 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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
OC179B

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] Cautions for service
• After recovering all the 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.
OC179B

4
PART NAMES AND FUNCTIONS
2
●Indoor Unit
PKFY-P32VGM
PKFY-P40VGM
PKFY-P50VGM
●Remote controller [PAR-F25MA]
Once the controls are set, the same operation mode can be repeated by simply pressing the on / off button.
●Operation buttons
TIMER button
This switches between continuous
operation and the timer operation.
AIR SPEED button
This sets the ventilation fan speed.
TIME SETTING button
This sets or switches the current
time, start time and stop time.
OPERATION SWITCH button
This switches the cooler electronic
dry (dehumidify), automatic and
heater modes.
TEMP ADJUSTMENT button
This sets the room temperature.
The temperature setting can be per-
formed in 1°C units.
Setting range :
Cooler 19°C to 30°C
Heater 17°C to 28°C
CHECK-TEST RUN button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation
FILTER button
This resets the filter service indica-
tion display
AIR DIRECTION button
This adjusts the vertical angle of the
ventilation.
ON/OFF button
This switches between the opera-
tion and stop modes each time it is
pressed. The lamp on this button
lights during operation.
The model name of the remote con-
troller is indicated.
LOUVER button
This switches the horizontal fan
motion ON and OFF.
(This button does not operate in this
model.)
Air intake Air intake grill
Filter
Air outlet
Guide vane
Auto vane
OC179B

5
●Display
Caution
Only the Power display lights when the unit is stopped and power supplied to the unit.
When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a mal-
function.
When the central control remote control unit, which is sold separately, is used the ON-OFF button, Operation switch button
and iTEMP button do not operate.
“NOT AVAILABLE” is displayed when the Air speed button and the Louver 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 “ HO ” is displayed on the room temperature indication (For max.
2 minutes). Please wait until this “ HO ” 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
This indicates when the standby
mode is set from the time the sleep
operation starts until the heating air
is discharged.
DEFROST display
This indicates when the defrost
operation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
POWER display
This display lights when the filter
need to be cleaned.
SET TEMPERATURE display
This displays the selected setting
temperature.
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.
FAN SPEED display
The selected fan speed is displayed.
In this display example on
the bottom left, a condition
where all display lamps light
is shown for explanation
purposes although this differs
from actual operation.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
ROOM TEMPERATURE display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual tem-
perature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when malfunction occurs.
OC179B

6
3SPECIFICATIONS
3-1. Specification
12 - 11 - 10 - 9
15.88 <5/8">
9.52 <3/8">
43 - 40 - 37 - 34
Power
consumption
Current
Type ×No.
Air flow +2
External stafic pressure
Fan motor output
Item
Power source
Cooling capacity
Heating capacity
Exterior <munsell symbol>
Dimensions
Heat exchanger
Fan
Air filter
Refrigerant
pipe dimensions
Drain pipe dimension
Noise level +2
Product weight
Unit
V · Hz
kcal/h
kcal/h
kW
kW
A
A
—
mm
mm
mm
—
—
G/min
Pa
kW
—
:mm
:mm
:mm
dB (A)
kg
Cooling
Heating
Cooling
Heating
Height
Width
Depth
Gas side
Liquid side
PKFY-P32VGM
3150
3550
PKFY-P40VGM
4000
4500
Single phase 220-240V 50Hz / 220V 60Hz
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)
Lineflow fan ×1
0
0.03
PP Honey comb
Outer diameter 20 <PVC pipe VP-20 connectable>
16
Electric
characteristic
PKFY-P50VGM
5000
5600
11.5 - 10.5 - 9.5 - 8
12.7 <1/2">
6.35 <1/4">
41 - 38 - 36 - 33
Note : w1.Rating conditions
Cooling :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
W2.Air flow and the noise level are indicated as High - Medium1 - Medium2 - Low .
OC179B

7
3-2. Electrical parts specifications
Transformer
Room temperature thermistor
Liquid pipe thermistor
Gas pipe 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
Symbol
T
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
PKFY-P32VGM PKFY-P40VGM
(Primary) 50/60Hz 220 - 240V (Secondary) 18.4V 1.7A
Resistance
0C/15k, 10C/9.6k, 20C/6.3k, 25C/5.4k, 30C/4.3k, 40C/3.0k
250V 6.3A
PM4V30-K 220-240V/220V , 50/60Hz
4 pole Output 30W
OFF 125 ± 5
2.0F 440V
MP 35 EA DC12V
DC12V Stepping motor drive
Port dimension :3.2 (0 ~ 2000pulse)
(L, N, ) 330V 30A
(M1, M2, S) 250V 20A
Model
Parts name PKFY-P50VGM
Inner-thermostat
OC179B

8
OUTLINES AND DIMENSIONS4
Unit : mm
PKFY- P32VGM
PKFY- P40VGM
PKFY- P50VGM
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
1 Sleeves are available on the market. 2 This size shows the lower end of through hole.
:90 ~ :100 :75 ~ :80
:90 :75
Through holeSleeve 1
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
Knockout hole for right piping Refrigerant pipe.Drain pipe. Wiring hole
Gas pipe
Liquid pipe
Address board
Terminal block for power supply Terminal block for remote control
Filter grip
21
21
Knockout 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
Knockout 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
79
160 40
705 235
Less than 15
198
70
245
60
235
53
340
715 225
340 80 280 233
990
OC179B

9
5WIRING DIAGRAM
PKFY-P32VGM, PKFY-P40VGM, PKFY-P50VGM
PIN
BLU YLW ORN RED
BRN
SW3
109876
ON
OFF 12345
SW2
ON
OFF 123456
P32VGM
Models
ON
OFF 123456
P40VGM 109876
ON
OFF 12345
Models SW2
P50VGM ON
OFF 123456 54321 OFF
ON
678910
SW3
<1 >
The black square (■) indicates a switch position.
See fig: 1
ORN BLU RED
BRN
WHT YLW
(RED)
CN50
DRAIN
CN29
GAS
(BLK)
CN21
LIQUID
(WHT) (RED)
CN20
INTAKE
N
TB2
L
GRN/YLW
~ 220-240V 50Hz
~ 220V 60Hz
POWER SUPPLY
PULL BOX
BREAKER(15A)
FUSE(15A)
TO NEXT INDOOR UNIT
BLU
BLU
S(SHIELD)
M1
M2
REMOTE CONTROLLER
DC24-30V
{
BC CONTROLLER
TO OUTDOOR UNIT
TB5
(BLU)
M-NET
CN2M
AC220-240V
T
AC18.4V
RED
BLU
BLU BLU
CN52
(WHT)
REMOTE
INDICATION CN51
CENTRALLY
CONTROL
(WHT)
LEV
(WHT)
CN60 CN32
REMOTO
SWITCH
(WHT)
BLU RED
FUSE
250V
6.3A
CND
(RED) CN3T
(RED)
ADDRESS
(RED)
CN42
ADDRESS
(RED)
CN81
(GRN)
VANE
CN6V
RED WHT
CNT
(WHT)
FAN1
(WHT)
WHT
BLK
RED
3RD
DIGIT 2ND DIGIT 1ST
DIGIT CONNEC
(RED)
ADDRESS
CN82
CN43
(RED)
ADDRESS
240V220V SW5
SWC
CN26
4
1
135151
4
32
X4
TH22
LED5LED2LED1LED3LED4
0N
SW4
1
4
1
0N
1234567891023456
SW3SW2
ON
OFF12345678910
SW1
SW12 SW11
A.B
00
F.C
HA
CN41
6
ZNR
X4
SW14
0
0FF
MV
8
0FF
LEV TH23 TH21
(WHT)
I.B
C1
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.Symbols used in wiring diagram above are, :terminal block, :connecter.
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 according to the power supply voltare.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts, set SW5 to 220V side.
21
12
123456
123412345678561234
4
3
2
18
7
6
5
4
3
2
1
1221
12345
13 31 1
2
31
513
132
MF
Note
-TION No.
PKFY-
PKFY-
PKFY-
Mode selection
A.B
SW12
SW11
SW1
SW14
SW5
SWC Option selector
Connection No.
Address setting 2nd digit
Address setting 1st digit
Voltage selection
Switch
Circuit board
Transmission
Power supply
(0/15,25/5.4)
Pipe temperature detection/Liquid
(0/15,25/5.4)
Pipe temperature detection/Gas
(0/15,25/5.4)
Transformer
Fan motor (with inner thermostat)
Capacitor (fan motor)
Room temperature detection
TH22
TH23
C1
MF
T
TH21 Thermistor
TB2
TB5
LEV block
Terminal
Linear expansion valve
MV Vane motor
Symbol Name Symbol NameNameSymbol
F.C Fan phase control
Fuse (6.3A)FUSE
I.B
ZNR
X4
SW3
SW4
SW2
CN52
CN51
CN41
CN32 Indoor controller board Connector
Aux.Relay (Fan motor)
Varistor
Mode selection
Capacity code
Remote indication
Centrally control
Remote switch
HA terminal-A
Switch
Model selection
OC179B

10
REFRIGERANT SYSTEM DIAGRAM6
Strainer (#50mesh)
Strainer (#100mesh)
Strainer (#100mesh)
Heat exchanger
Room temperature thermistor
TH21
Gas pipe thermistor
TH23
Liquid pipe thermistor
TH22
Linear expansion valve
Gas pipe
Flare connection
PKFY-P32VGM
PKFY-P40VGM
PKFY-P50VGM
Gas pipe
PKFY-P32VGM, PKFY-P40VGM
{12.7 <1/2F>
Liquid pipe {6.35 <1/4F>
Capacity
Item
Refrigeration pipe size (Flare connection size)
PKFY-P50VGM
[15.88<5/8F>
[9.52<3/8F>
OC179B