Mitsubishi Electric PKFY-P32VGM-E Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION···························2
2. PART NAMES AND FUNCTIONS············6
3. SPECIFICATIONS····································8
4. OUTLINES AND DIMENSIONS·············10
5. WIRING DIAGRAM·································11
6. REFRIGERANT SYSTEM DIAGRAM····12
7. TROUBLE SHOOTING ··························13
8. DISASSEMBLY PROCEDURE ··············20
9. PARTS LIST···········································23
10. RoHS PARTS LIST································25
<Indoor unit>
[Model names] [Service Ref.]
PKFY-P32VGM-E PKFY-P32VGM-E
PKFY-P40VGM-E PKFY-P40VGM-E
PKFY-P50VGM-E PKFY-P50VGM-E
No. OC310
REVISED EDITION-A
Wall Mounted
Series PKFY
Indoor unit
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C R22
R410A
Note:
•This manual describes only
service data of the indoor
units.
•RoHS compliant products
have <G> mark on the spec
name plate.
•For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
Revision:
• RoHS PARTS LIST is added.
•Some descriptions have
been modified.
•Please void OC310.
July 2006
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2
1SAFETY PRECAUTION
[2] 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.
[1] Cautions for 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.
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 enter, that can cause
deterioration of refrigerant oil etc.
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.
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. Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Gravimeter
Unit
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3
[3] 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. —
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4
Cautions for units utilizing refrigerant R410A
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Keep the tools with care.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, that can cause deterio-
ration of refrigerant oil etc.
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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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5
[1] Cautions for service
(1) Perform service after collecting the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment
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6
2PART NAMES AND FUNCTIONS
● Indoor Unit
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E Air intake Air intake grille
Filter
Air outlet
Guide vane
Auto vane
● Operation buttons
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Set Temperature buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
door.
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To preceding operation
number.
Ventilation button
(Operation button)
To next operation number.
On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
● Wired remote controller
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7
●Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
˚F˚C
˚F˚C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
Identifies the current operation
Shows the operating mode, etc.
* Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote controller has been prohib-
ited by a master controller.
“Timer Is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, shows the time
remaining.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
Comes on when it is time to clean the
filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Displayed if the airflow is set to
weak and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Caution
●Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
●If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if he feature is not
present at the parent unit.
●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica-
tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.
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8
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-E PKFY-P40VGM-E PKFY-P50VGM-E
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
12.7(1/2") / 15.88(5/8")
6.35(1/4") / 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 (JIS B 8615-1)
Cooling :Indoor D.B. 27°C W.B. 19°C
Outdoor D.B. 35°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 .
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9
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-E PKFY-P40VGM-E
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ
Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 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-E
Inner-thermostat
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10
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)
1/2F / 5/8F
Gas pipe
1/2F
Liquid pipe
1/4F / 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-E
PKFY-P40VGM-E
PKFY-P50VGM-E
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
W1 Sleeves are available on the market. W2 In case of R22 or R407C. W3 This size shows the lower end of through hole.
[90 ~ [100
[75 ~ [80
[90 [75 Through holeSleeve w1
50 w2 32 , 40 , 50 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
w3
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11
WIRING DIAGRAM
5
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E
0
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
(WHT)
DRAIN
CN31
54321
OFF
ON 54321
OFF
ON SW4
ON
OFF 12345
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
240V220V SW5
1
~ 220V 60Hz
POWER SUPPLY
~ 220-240V 50Hz
FUSE(15A)
BREAKER
(15A)
PULL BOX
TO NEXT INDOOR UNIT
<fig:w1>
CONTROLLER
TO MA-REMOTE
54321
OFF
ON
678910
P40 654321
OFF
ON
Models
P32 654321
OFF
ON SW2
54321
OFF
ON
678910
SW3
P50 ON
OFF 123456 54321
OFF
ON
678910
TH21
54321
12345678910
6
LEV
4
123456
8
ON
OFF12345678910
SW1
SW12 SW11
A.B
00
MV
P.B
TRANS CN2S
DC13.1V
(WHT)(RED)
AC220-240V
CNSK
X4
41
3
5151
X4
0N
SW4
0N SW3SW2
FAN
F.C
CND
FUSE
250V
6.3A
ZNR
CN6V CN42
CN81 0FF 0FF
I.B C1
TB15 1
2
{
(WHT)
DC8.7-13V
(RED)
BLK WHT RED
BLU RED
BLK WHT
ORN YLW
BLU
PIN
RED BRN
VANE
(GRN) ADDRESS
(RED) (RED)
ADDRESS
CN52
(GRN)
REMOTE
INDICATION
CN51
CENTRALLY
CONTROL
(WHT)
See fig:w1
BLU RED BRN
YLW
WHT
ORN
(WHT)
REMOTE
SWITCH
CN32
(WHT)
HA
CN41
(BLK)
GAS
CN29
(RED)
CN20
INTAKE
(WHT)
LIQUID
CN21
TH23TH22
(WHT)
LEV
CN60
CN2M
CNDK
(RED) LED1
LED2
(BLU)
CN3A
CN2D
(WHT)
(BLU)
(M-NET)
BLK
WHT
BLU
BLU
ORN
ORN
M1
M2
S(SHIELD)
{
REMOTE CONTROLLER
DC24-30V
BC CONTROLLER
TO OUTDOOR UNIT
TB5
3RD
DIGIT 2ND DIGIT 1ST
DIGIT
0
SW14
CONNECTION
NO.
SWC
(RED)
ADDRESS
CN82
(RED)
ADDRESS
CN43
RED
BLU N
TB2 L
GRN/YLW
Power supply for MA-Remote controller
321
Thermistor
TH23
(0ºC/15k", 25ºC/5.4k")
Pipe temperature detection/Gas
Indoor power board
P.B
MA-Remote Controller
TB15
121221
4
3
2
18
7
6
5
4
3
2
1
2
1
3
2
1
13
2
1
3
1
2
31
1
2
123456
513
132
MF
123412345678561234
MV
MF
C1
Vane motor
Terminal
block
TB5
TB2
Fan motor (with inner thermo)
Power supply
Transmission
LEV Linear expansion valve
Capacitor (fan motor)
(0ºC/15k", 25ºC/5.4k")
Pipe temperature detection/Liquid
(0ºC/15k", 25ºC/5.4k")
Room temperature detection
TH22
TH21 Thermistor
1.At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.
2.In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)
3.In case of using M-NET, please connect to TB5.
(Transmisson line is non-polar.)
4.Symbol[S] of TB5 is the shield wire connection.
5.Symbols used in wiring diagram above are, :terminal block, :connecter.
6.The setting of the SW2 dip switches differs in the capacity for the detail,refer to the fig:w1.
7.Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts,set SW5 to 220V side.
Note
Legend Symbol Name Symbol Name
NameSymbol
FUSE
F.C Fuse (6.3A) Fan phase control
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
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12
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-E
PKFY-P40VGM-E
PKFY-P50VGM-E
Gas pipe
PKFY-P32VGM-E PKFY-P40VGM-E
{12.7 (1/2”)
Liquid pipe {6.35 (1/4”)
Capacity
Item PKFY-P50VGM-E
{12.7 (1/2”) or [15.88(5/8”)
{6.35 (1/4”) or [9.52(3/8”)
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13
TROUBLE SHOOTING
7
7-1. HOW TO CHECK
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E
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 the details.
Refer to the next
page for the details.
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14
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'
25:5.4k'
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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15
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.
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16
7-2. FUNCTION OF DIPSWITCH
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E
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
Capacity SW2 Capacity SW2 Capacity SW2
P32 P40
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
P32 = OFF
P40 = ON
P50 = OFF
Set while the unit is off.
ON
OFF 123456
ON
OFF 123456
ON
OFF 12345678910
<At delivery>
ON
OFF 12345
P50
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17
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
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18
7-3. TEST POINT DIAGRAM
7-3-1. Indoor controller board
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E
LED1
Main power supply
(Indoor unit : 220-240V)
CND
Power supply for
indoor controller board
Between 11to 33220-240V AC
CNP
Drain-up machine output (DP)
Between 11to 33220-240V AC
FUSE
6.3A 250V
CNDK
Connect to the indoor power
board (CNSK)
Between 11to 33220-240V AC
FAN
Fan motor output (MF)
CN2D
Connect to the indoor
power board (CN2S)
12.5-13.7V DC (Pin11(+))
CN2M
Connect to the terminal block (TB5)
(M-NET transmission connecting wire)
24-30V DC (non-polar)
CN3A
Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)
Between 11to 338.7-13V DC (Pin11(+))
CN29
Pipe temperature
thermistor/Gas (TH23)
CN21
Pipe temperature
thermistor/Liquid (TH22)
LED2
Power supply for
MA-Remote controller
CN32
Connector
(Remote switch)
SW4
Model selection
CN60
Linear expansion valve
output (LEV)
CN31
Drain sensor (DS)
SW3
Mode selection
CN51
Centrally control
SW2
Capacity setting
CN52
Remote indication
CN6V
Vane moter output (MV)
CN20
Room temperature
thermistor (TH21)
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19
7-3-2. Indoor power board
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E
CNSK
Connect to the indoor controller board (CNDK)
Between 11to 33220-240V AC
CN2S
Connect to the indoor power board (CN2D)
Between 11to 3312.6-13.7V DC (Pin11(+))
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20
8DISASSEMBLY PROCEDURE
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E
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(1 screw).
(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
OC310A---1.qxp 06.7.7 3:49 PM Page 20