Mitsubishi Electric PCFY 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···········9
5. WIRING DIAGRAM····························13
6. REFRIGERANT SYSTEM DIAGRAM ··14
7. TROUBLE SHOOTING······················15
8. DISASSEMBLY PROCEDURE··········20
9. PARTS LIST·······································24
10. OPTIONAL PARTS ··························31
PCFY-P40VGM-A PCFY-P40VGM-A
PCFY-P63VGM-A PCFY-P63VGM-A
PCFY-P100VGM-A PCFY-P100VGM-A
PCFY-P125VGM-A PCFY-P125VGM-A
No. OC249
INDOOR UNIT
Ceiling Suspended
Series PCFY R407C /R22
2001
<Indoor unit>
[Model name] [Service Ref.]
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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.
[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.
Gravimeter
Unit
OC249.qxp 3/8/01 4:37 PM Page 3

2PART NAMES AND FUNCTIONS
● Indoor (Main) Unit
Air outlet
Intake grille Air intake
Left/right guide vanes
Change the direction of airflow
from the horizontal blower.
Long-life fillter
Removes dust and foreigh matter from air coming in
through the grille (Recommended cleaning interval :
Approx, every 2,500 operating hours)
Up/down guide vanes
Change the direction of airflow from the
vartical blower.
● Remote controller
● Operation buttons
[PAR-20MAA]
● Once the controls are set, the same operation mode can be repeated
by simply pressing the ON/OFF button.
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
4
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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 dis-
play range is 8°C to 39°C. The dis-
play 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. Specifications
Note 1. Rating conditions(JIS B 8616)
Cooling : Indoor : D.B. 27°C W.B. 19.0°C
outdoor : D.B. 35°C
Heating : Indoor : D.B. 20°C
outdoor : D.B. 7°C W.B. 6°C
W. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.
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
Air filter
Fan ✕No
Air flow W
Pipe
dimensions
Unit drain pipe size
Noise level W
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
PCFY-P40VGM-A PCFY-P63VGM-A PCFY-P100VGM-A PCFY-P125VGM-A
Single phase 220-230-240V 50Hz / 220V 60Hz
4.5
5.0
0.10
0.10
0.46
0.46
7.1
8.0
0.13
0.13
0.60
0.60
11.2
12.5
0.16
0.16
0.73
0.73
14.0
16.0
0.24
0.24
1.10
1.10
1310
18 -16 -14 -12
0.07
15.88(5/8")
9.52(3/8")
39 -37 -34 -32
34
Unit : Munsell<0.70Y 8.59/0.97>
680
Cross fin (Aluminum plate fine and copper tube)
Sirocco fan ✕3
0
PP honey comb
I.D.26 (PVC pipe VP-20 connectable)
19.05(3/4")
9.52(3/8")
210 270
1310
25 -23 -20 -18
0.09
43 -41 -38 -36
37
1620
Sirocco fan ✕4
35 -32 -28 -26
0.15
44 -42 -39 -37
43
1000
Sirocco fan ✕2
12 -11 -10 -8
0.054
12.7(1/2")
6.35(1/4")
38 -36 -33 -29
27
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7
3-2. Electrical parts specifications
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
TB15
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
250V 6.3A
OFF 130:I5:
(L, N, ;) 330V 30A
(M1, M2, S) 250V 20A
(1, 2) 250V 10A
3µF ✕440V
Inner-thermostat
4µF ✕440V 4µF ✕440V 6µF ✕440VFan motor capacitor
Vane motor
Linear expansion valve
PCFY-P40VGM-A PCFY-P63VGM-A PCFY-P100VGM-A PCFY-P125VGM-A
Room temperature
thermistor
Liquid pipe temperature
thermistor
Gas pipe temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
(with inner-thermostat)
Power supply
terminal block
Transmission
terminal block
MA remote controller
terminal block
DC12V Stepping
motor drive
[3.2 (0~2000pulse)
4-Pole Output 54W
D09B4P54MS
MP35EA
DC12V MP42EA DC12V
4-Pole Output 70W
D09C4P70MS 4-Pole Output 90W D10B4P90MS 4-Pole Output 150W D10B4P150MS
DC12V Stepping motor drive
[3.2 (0~2000pulse)
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8
3-3. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PCFY-P40VGM-A Hi
NOTCH
Mi1
Mi2
Lo
35
SPL(dB)
33
30
27
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PCFY-P63VGM-A Hi
NOTCH
Mi1
Mi2
Lo
37
SPL(dB)
36
34
32
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PCFY-P100VGM-A Hi
NOTCH
Mi1
Mi2
Lo
39
SPL(dB)
37
35
33
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PCFY-P125VGM-A Hi
NOTCH
Mi1
Mi2
Lo
39
SPL(dB)
37
35
33
LINE
Ambient temperature 27:
Test conditions are based on JIS Z8731
UNIT
About 1.4m
MICROPHONE
CEILING
1m
1m
OC249.qxp 3/8/01 4:37 PM Page 8

OUTLINES AND DIMENSIONS4
9
INDOOR UNIT
PCFY-P40VGM-A
2
1
Air intake
When electrical box is pulled down
Electrical box
Air outlet
7
8
54
32
6
Electrical box
(Drainage)
(1/2F)gas
(1/4F)liquid
( FRONT VIEW )
Ceiling
56506
161 90
904
933 (Suspension bolt pitch)
157
70 15 85
81
210
226
241
201
182
180
76
680
254
150 17
70140
320 80
918
1000
983
6 ~ 7
928
525
42 179
161 32
46
175
131
1
352
171
138
86
263
38
38
79
1Drainage pipe connection (26mm I.D.) 5Refrigerant-pipe connection (liquid pipe side/flared connection) 2Drainage pipe connection (for the left arrangement) 6Knock out hole for upper drain pipe arrangement 3Knock out hole for left drain-piping arrangement 7Knock out hole for left drain pipe arrangement 4Refrigerant-pipe connection (gas pipe side/flared connection) 8Knock out hole for wiring arrangement NOTES:
1. Use M10 or W3/8 screws for anchor bolt. 2. Please be sure when installing the drain-up machine (option parts).
refrigerant pipe will be only upper drain pipe arrangement.
Unit : mm
OC249.qxp 3/8/01 4:37 PM Page 9

10
PCFY-P63VGM-A
(Drainage)
(5/8F)gas
(3/8F)liquid
Air intake
Air outlet
Electrical box
When electrical box is pulled down
Ceiling
( FRONT VIEW )
Electrical box
6
4
1
5
8
2
3
7
2
506 56
90161
1240 (Suspension bolt pitch)
157
1228 1310 1214 1290 15 85
81
210
226
241
201
182
180
76
680
254
150 17
70140
320 80
70
6 ~ 7
1235 416525
42 179
161 32
46
175
131
1
171
138
86
263
38
38
79
1Drainage pipe connection (26mm I.D.) 5Refrigerant-pipe connection (liquid pipe side/flared connection) 2Drainage pipe connection (for the left arrangement) 6Knock out hole for upper drain pipe arrangement 3Knock out hole for left drain-piping arrangement 7Knock out hole for left drain pipe arrangement 4Refrigerant-pipe connection (gas pipe side/flared connection) 8Knock out hole for wiring arrangement NOTES:
1. Use M10 or W3/8 screws for anchor bolt. 2. Please be sure when installing the drain-up machine (option parts).
refrigerant pipe will be only upper drain pipe arrangement.
Unit : mm
OC249.qxp 3/8/01 4:37 PM Page 10

11
(3/8F)liq
u
(3/4F)ga
s
(Drainag
e
Air intake
Air outlet
1240 (Suspension bolt pitch)
Electrical box
When electrical box is pulled down
( FRONT VIEW )
Ceiling
Electrical box
6
2
7
4
1
5
8
2
3
506 56
90161
229
217
70
70140
18150
80320
1214 1310
81 96
207
270
680
254
1228
182
198
245
16 87
38 38 140
525
6 ~ 7
160 93
42 239
1235
687 263
171
138
86
45
192
236 1
PCFY-P100VGM-A
1Drainage pipe connection (26mm I.D.) 5Refrigerant-pipe connection (liquid pipe side/flared connection) 2Drainage pipe connection (for the left arrangement) 6Knock out hole for upper drain pipe arrangement 3Knock out hole for left drain-piping arrangement 7Knock out hole for left drain pipe arrangement 4Refrigerant-pipe connection (gas pipe side/flared connection) 8Knock out hole for wiring arrangement NOTES:
1. Use M10 or W3/8 screws for anchor bolt. 2. Please be sure when installing the drain-up machine (option parts).
refrigerant pipe will be only upper drain pipe arrangement.
Unit : mm
OC249.qxp 3/8/01 4:37 PM Page 11

12
Air intake
Air outlet
Electrical box
When electrical box is pulled down
( FRONT VIEW )
Ceiling
Electrical box
(Drainage)
(3/4F)gus
(3/8F)liquid
6
2
2
7
4
1
5
8
3
506 56
90161
229
217
1545 1547 (Suspension bolt pitch)
1524 1620 1535
198
87
270
81 96
207
182
245
16
680
254 80
150 18
140 70
320
70
525 687 263
171
138
86
38 38 140
6 ~ 7
160 93
42 239
45
192
236 1
PCFY-P125VGM-A
1Drainage pipe connection (26mm I.D.) 5Refrigerant-pipe connection (liquid pipe side/flared connection) 2Drainage pipe connection (for the left arrangement) 6Knock out hole for upper drain pipe arrangement 3Knock out hole for left drain-piping arrangement 7Knock out hole for left drain pipe arrangement 4Refrigerant-pipe connection (gas pipe side/flared connection) 8Knock out hole for wiring arrangement
NOTES: 1. Use M10 or W3/8 screws for anchor bolt. 2. Please be sure when installing the drain-up machine (option parts).
refrigerant pipe will be only upper drain pipe arrangement.
Unit : mm
OC249.qxp 3/8/01 4:37 PM Page 12

WIRING DIAGRAM
5
13
(GRN)
(BLU)
DS(OPTION)
(WHT)
DRAIN
CN31
(OPTION)
6
BRN
RED ORN YLW WHT BLU
MV
CN6V
VANE
(GRN)
MODELS
PCFY-P100,P125VGM
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
X1
X4
CNDK CN2D WHT
ORN
ORN
1CN41 4
CNP
X1
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
REMOTO
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
WHT
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
DS
I.B
432165
432165
12
1221
432165
21
12
432165 87654321 4321
321
MF
315
315
654321
2
1
13
2
1
3
DP
13 1
2
31
1
2
31 2
432165 123
A.B
SWA
SWC
SW5
220V 240V
2ND
DIGIT
CN82
ADDRESS
(RED)
ON
OFF 12345678910
SW1
SW12SW11
3RD
DIGIT
00
1ST
DIGIT
CONNECTION
NO.
SW14
0
ADDRESS
(RED)
CN43
3
1
2
4
3
2
18
7
6
5
4
3
2
1
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
Ceiling height selector
SWC
SWA
Linear expansion valve
LEV
Varistor
ZNR
Model selection
Capacity code
Mode selection
Remote indication
Centrally control
Remote switch
Legend
I.B Indoor controller board
Connector
CN32
CN51
CN52
Switch
SW2
SW3
SW4
CNP
Voltage selection
Address setting 2nd digit
Connection No.
Address setting 1st digit
Mode selection
Address
Power supply
Vane motor
Circuit board
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 / Liquid
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
Fan motor
X4
X1 Drain-up machine
Fan motor (with inner thermo)
MF
Drain-up machine
Drain sensor (OPTION)
Drain-up machine (OPTION)
DS
DP
TB5 Transmission
TB15 MA-remote controller
PCFY-P40VGM-A , PCFY-P63VGM-A , PCFY-P100VGM-A , PCFY-P125VGM-A
SW3
21
OFF
ON
345678910
1098756
ON
OFF 1234
PCFY-P100VGM ON
OFF 123456
<w1>
ON
OFF 123456
PCFY-P125VGM
PCFY-P63VGM 654321
OFF
ON 654321
OFF
ON
PCFY-P40VGM
Models SW2
(Remote controller wire is non-polar.)
8.
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.)
Fasten terminal of the terminal board " TB5" equips lock system.
To remove the fasten terminal, pull it while pressing the protruding portion (locking level)
of the terminal. Connection of the fasten terminal, protruding portion should face upward.
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.
OC249.qxp 3/8/01 4:37 PM Page 13

14
6REFRIGERANT 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
Gas pipe
PCFY-P40VGM-A
{12.7(1/2”)
PCFY-P63VGM-A
{15.88(5/8”)
PCFY-P100VGM-A
PCFY-P125VGM-A
{19.05(3/4”)
Liquid pipe {6.35(1/4”) {9.52(3/8”) {9.52(3/8”)
Capacity
Item
PCFY-P40VGM-A
PCFY-P63VGM-A
PCFY-P100VGM-A
PCFY-P125VGM-A
OC249.qxp 3/8/01 4:37 PM Page 14

TROUBLE SHOOTING
7
15
7-1. How to check the parts
PCFY-P40VGM-A , PCFY-P63VGM-A , PCFY-P100VGM-A , PCFY-P125VGM-A
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)
Disconnect the connector then measure the resistance valve using a tester.
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)
Linear expansion
valve
Drain-up machine
(Optional)
Drain sensor
(Optional)
(Refer to the next page for a detail.)
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
1
3
Gray
Gray
1
2
3
Normal
4.3k"~9.6k"
Abnormal
Open or short
Abnormal
Open or short
Normal
0.6k"~6.0k"
Abnormal
Open or short
Normal

150k"i10%
(1)-(5)
White-Red (2)-(6) Yellow-Brown (3)-(5) Orange-Red (4)-(6) Blue-Brown
Normal Abnormal
92"Open or short
Orange
Red
White
Blue
Brown
Yellow
3
6
15
4
2
M
Measure the resistance between the terminals using a tester.Fan motor
1
1
3
3
5
5
Red
White
Black
Relay connector
Protector
P40VGM-A
70.6"
69.6"
P63VGM-A
45.0"
44.8"
P100VGM-A
43.7"
53.3"
P125VGM-A
20.4"
20.7"
Abnormal
Open or short
Red-Black
White-Black
Motor terminal
or
Relay connector
Normal
PCFY-
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)
Vane motor
Normal
PCFY-P40VGM-A PCFY-P63VGM-A
Connector Abnormal
186~214"140~160"Open or short
Brown — Yellow
Brown — Blue
Brown — Orange
Brown — Pink
Normal
PCFY-P100VGM-A, PCFY-P125VGM-A
Connector Abnormal
140~160"Open or short
Red — Blue
Red —Yellow
Red — Pink
Red — Orange
(Refer to the next
page for a detail.)
BlueYellow Brown
Orange
Red
Pink
2
3
Yellow
3
4
5
Orange
Red
Pink
2
4
5
61
Blue
1
Connector
Pin No.
Connector
Pin No.
M
M
OC249.qxp 3/8/01 4:37 PM Page 15

16
<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 at
lower temperature
Linear expansion valve
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor at lower temperature >
Temperature (:)
Resistance (K")
11Operation 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 opening can be changed in proportion to the number of pulse signal.
<Connection between the indoor controller board and the linear expansion valve>
4[4
3
62
5
[3
2[2
1[1
[4
[3
[2
[1
Controller board
Drive circuit
Relay connector
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
5
1
3
4
6
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
1
273+t 1
273
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
OC249.qxp 3/8/01 4:37 PM Page 16

17
Output
(Phase)
number
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>
22Linear expansion valve operation
33Trouble shooting
D
A
E
B
C
Open
Extra tightning (80~100pulse)
Pulse number
2000 pulse
Open the valve
all the way
Close
6
5
4
3
2
1
LED1T
Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shift as 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 will lock and vibrate.
❈ 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
position.
When the valve move smoothly, there is no noise or vibration
occur from the linear expansion valve : however, when the pulse
number moves from E to Aor when the valve is locked, more
noise can be hear 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.
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 turn 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.
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"I10%
Short or breakage of
the motor coil of the
linear expansion
valve.
Thermistor
(Liquid pipe)
Linear
expansion
valve
OC249.qxp 3/8/01 4:37 PM Page 17

18
7-2. FUNCTION OF DIP SWITCH
PCFY-P40VGM-A , PCFY-P63VGM-A , PCFY-P100VGM-A , PCFY-P125VGM-A
1
2
3
4
5
6
7
8
9
10
1~6
1
2
3
4
5
6
7
8
9
10
1~4
Room temperature Thermistor
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 reset function Effective Not effective
Power resource ON/OFF Effective Not effective
Heat pump/Cool only Cooling only Heat pump
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 w4Horizontal angle Down B,C
Effective Not effective
Heater 4degrees up Not effective Effective
Target Superheat setting w59degrees 6degrees
Target Subcool setting 15degrees 10degrees
ON
OFF
ON
OFF
12345
12345
ON
OFF 12345678910
ON
OFF 12345678910
ON
OFF 123456
ON
OFF 123456
ON
OFF 123456
ON
OFF 123456
MODELS SW2 MODELS SW2 MODELS SW2
PCFY-
P40VGM-A PCFY- P63VGM-A
PCFY-
P100VGM-A
PCFY-
P125VGM-A
Address board
<At delivery>
Indoor controller board
Indoor controller board
Indoor controller board
<At delivery>
<At delivery>
SW4
Unit
Selection
SW3
Function
Selection
SW2
Capacity
code
setting
SW1
Mode
Selection
Switch Pole Function Remarks
Operation by switch
Built-in remote controller Indoor unit
Indoor linear expansion
valve opening
NOTE:
w1 At Heating mode, fan
operating.
w2 At Heater mode, operating
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
PCFY-P40VGM = ON
PCFY-P63VGM = OFF
PCFY-P100VGM = OFF
PCFY-P125VGM = OFF
Set while the unit is off.
OC249.qxp 3/8/01 4:37 PM Page 18

19
3
2
1
(High)
(Standard)
(Low)
Option
(Standard)
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
3
2
1
Option
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
Address board
Address board
Operation by switchSwitch Remarks
❈Ceiling height can be changed depends on
SW A setting.
<At delivery>
<At delivery>
<At delivery>
<At delivery>
1~3
SWA
Set the
ceiling
height
2
SWC
Option
SW11
1st digit
address
setting
SW12
2nd digit
address
setting
Rotary switch
SW14
Connection
No. setting
Rotary switch
When the optional high performance filter ele-
ments (filter casement) is attached to the unit,
be sure to set switch to the option side in
order to prevent the airflow reducing.
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.
Address can be set while the
unit is stopped.
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 switch to 240V side.
If the unit is used at the 220V, set the switch
to 220V side.
10 1
OC249.qxp 3/8/01 4:37 PM Page 19

OPERATING PROCEDURE
20
8DISASSEMBLY PROCEDURE
PHOTOS & ILLUSTRATIONS
1. Removing the air intake grille
(1) Slide the intake grille holding knobs (at two locations)
backward to open the intake grille.
(2) When the intake grille left open, push the stoppers on the
rear hinges (at two locations) to pull out the intake grille.
2. Removing the electrical box
(1) Remove the air intake grille.
(2) Remove the screw from the beam and remove the beam.
(3) Remove the screws from the electrical cover, and remove
the electrical cover.
(4) Disconnect the following wires from the indoor control
board.
• Fan motor : FAN
• Vane motor : CN6V
• Linear expansion valve : CN60
• Room temperature thermistor : CN20
• Liquid pipe temperature thermistor : CN21
• Gas pipe temperature thermistor : CN29
(5) Remove the screws from the electrical box and pull out
the electrical box.
<Electrical parts in the electrical box>
Terminal block (for power supply)
Terminal block (for transmission)
Terminal block (for MA remote controller)
Indoor control board
Address board
Power board
Capacitor
Figure 1
Figure 2
Photo 1
slide
intake grille
intake grille
holding knobs
hinges
Pull out the intake grille
electrical cover
screws(electrical cover)
screws(electrical box)
Slide to the left beam
clamp
INDOOR UNIT : PCFY-P63VGM-A
Capacitor
Power board
Indoor
control
board Terminal block
(power supply)
Address board
Terminal block
(transmission)
Terminal block
(MA remote
controller)
OC249.qxp 3/8/01 4:37 PM Page 20