Mitsubishi Electric PMFY-P20VBM-E1 Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Indoor unit
[Model names] [Service Ref.]
No. OC307
REVISED EDITION-D
INDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES.....................2
2. SAFETY PRECAUTION......................2
3. PART NAMES AND FUNCTIONS...... 6
4. SPECIFICATIONS...............................8
5. OUTLINES AND DIMENSIONS........ 12
6. WIRING DIAGRAM........................... 13
7. REFRIGERANT SYSTEM DIAGRAM..... 16
8. TROUBLE SHOOTING.....................17
9. DISASSEMBLY PROCEDURE.........26
10. PARTS LIST......................................30
11. RoHS PARTS LIST........................... 33
Ceiling Cassettes
Series PMFY
R407C R22
R410A
October 2009
Note:
•This manual describes only
service data of the indoor
units.
•RoHS compliant products
have <G> mark on the spec
name plate.
•For servicing RoHS compli-
ant products, refer to the
RoHS Parts List.
Revision:
•
PMFY-P20/25/32/40VBM-ER3
are added in REVISED
EDITION-D.
•Some descriptions have
been modified.
•Please void OC307
REVISED EDITION-C.
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E1
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E1
PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

2
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R407C
CAUTIONS RELATED TO NEW REFRIGERANT
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 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 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 new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
In case of using the existing pipes for R22, be careful with
the followings.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
1TECHNICAL CHANGES
PMFY-P20VBM-E PMFY-P20VBM-E1
PMFY-P25VBM-E PMFY-P25VBM-E1
PMFY-P32VBM-E PMFY-P32VBM-E1
PMFY-P40VBM-E PMFY-P40VBM-E1
1. FAN MOTOR (MF) has been changed.
2. CONTROLLER BOARD (I.B) has been changed.
PMFY-P20VBM-E1PMFY-P20VBM-E#2
PMFY-P25VBM-E1PMFY-P25VBM-E#2
PMFY-P32VBM-E1PMFY-P32VBM-E#2
PMFY-P40VBM-E1PMFY-P40VBM-E#2
1. CONTROLLER BOARD (I.B) has been changed.
2. PANEL has been changed.
PMP-40BM →PMP-40BMW
(White : 0.98Y 8.99/0.63) (Pure white : 6.4Y 8.9/0.4)
3. FAN MOTOR (MF) has been changed.
4. THERMISTOR (TH22, TH23) have been changed.
PMFY-P20VBM-E#2 PMFY-P20VBM-ER3
PMFY-P25VBM-E#2 PMFY-P25VBM-ER3
PMFY-P32VBM-E#2 PMFY-P32VBM-ER3
PMFY-P40VBM-E#2 PMFY-P40VBM-ER3
1. DRAIN PIPE has been changed.
2. JOINT SOCKET (FOR DRAIN PIPE) has been added.

33
[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.
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
[1] 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.
Gravimeter
Unit
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 · Use the existing fitting SPECIFICATIONS. (UNF7/16)
· 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 —

4
Cautions for units utilizing refrigerant R410A
Store the piping to be used indoors during
installation, and 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.
Handle tools with care.
If dirt, dust or moisture enters 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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
In case of using the existing pipes for R22, be careful with
the followings.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.

5
[1] Cautions for service
(1) Perform service after recovering 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. Tool name 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.
5Adapter 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 —

6
3PART NAMES AND FUNCTIONS
Indoor Unit
Guide vane
Air flow can be changed to horizontal
by moving the Guide vane to the left or right.
Air intake
Returns air from room.
Filters
Remove dust and pollutants
from return air.
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Horizontal Air Outlet
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Temperature setting 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
lid
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 return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Built-in temperature sensor
Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

77
Wired remote controller
●
●
°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
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote 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, the time to be
switched off is shown.
“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
To be displayed 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 direction
of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 8-39.
The display blinks if the temperature
is less than
8or 39 or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(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.
Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
when the airflow direction also
changes.

8
4SPECIFICATIONS
4-1. SPECIFICATION
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
Note 2. The number indicated in < > is for the grille.
W3. Air flow and the noise level are indicated as High – Medium1 – Medium2 – Low.
Item
V·Hz
kW
kW
kW
kW
A
A
—
mm
mm
mm
—
—
G/min
Pa
kW
—
—
:mm(in.)
:mm(in.)
:mm
dB
kg
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan × No
Air flow 3
Pipe
dimensions
Field drain pipe size
Noise level 3
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E1
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E1
PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3
Single phase 220V-230V-240V 50Hz / 220V 60Hz
2.2
2.5
0.042
0.042
0.20
0.20
2.8
3.2
0.044
0.044
0.21
0.21
3.6
4.0
0.044
0.044
0.21
0.21
4.5
5.0
0.054
0.054
0.26
0.26
9.3-8.6-8.0-7.3
37-36-34-32
8.7-8.0-7.2-6.5
35-33-30-27
10.7-9.7-8.7-7.7
39-37-35-33
Unit : Galvanized sheets · Standard grilles : ABS resin acrylic coating
Munsell <0.98Y 8.99/0.63> (PMFY-P·VBM-E(1)) / <6.4Y 8.9/0.4> (PMFY-P·VBM-E#2/ER3)
230<30>
812<1,000>
395<470>
Cross fin
Line flow fan × 1
0
0.028
Polyethylene sheet
PP honey comb fabric
12.7(1/2")
6.35(1/4")
O.D.26 (PVC pipe VP-20 connectable)
14<3.0>
F a n

99
4-2. ELECTRIC PARTS SPECIFICATIONS
Parts name
Service ref.
Symbol
TH21
TH22
TH23
FUSE
MF
MV
DP
DS
LEV
TB2
TB5
TB15
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
250V 6.3A
Thermistor resistance 0/6k, 10/3.9k, 20/2.6k, 25/2.2k, 30/1.8k, 40/1.3k
(L, N, ) 330V 30A
(M1, M2, S) 250V 20A
(1,2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Drain pump
Drain sensor
Linear expansion valve
PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E1
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E1
PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
Vane motor
Power supply
terminal block
Transmission
terminal block
DC Brushless Motor
8-pole OUTPUT 28W
PN0H28-MB
MSFJC 20M23
12V/380

PJV-1046
220-240V 50/60Hz
DC12V Stepping motor drive, Port dimension :3.2
(0~2000pulse)
MA-remote controller
terminal block

10
4-3. AIR CAPACITY TAKEN FROM OUTSIDE
PMFY-P·VBM-E series enables to take fresh air from outside. When taking fresh air, the duct fan is used.
The air capacity should be 20% or less of the air flow SPEC(Hi).
50.0
-50.0
-100.0
0.0 0.5 1.0
Air flow (m3/min)
2 intakes
1 intake
Characteristic diagram of fresh air taken capacity
Static pressure (Pa)
1.5 2.0 2.5
0.0
PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E1
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E1
PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3
8.7m³/min
9.3m³/min
9.3m³/min
10.7m³/min
Max 1.74m³/min
Max 1.86m³/min
Max 1.86m³/min
Max 2.14m³/min
Air flow
(Hi) Air capacity from outside
Service Ref.
(Knockout)
4-W2.8
Fresh air intake hole
(Knockout)
Fresh air intake hole
90
W122
W100
108
250 288.5 Unit : mm
Installation at site
1
~
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape, etc.
5Green
Yellow
Orange
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulatio
n
material by tape, etc.
CN51
on
indoor unit
board
Red
Brown
MB
Q
0
BA
C



Curve in the
right graphs
Duct characteristics
at site
Q
A
EC
Q
Qa
AD
Operation in conjunction with duct fan (Booster fan)
●Whenever the indoor unit is operating, the duct fun
operates.
(1) Connect the optional multiple remote controller
adapter(PAC-SA88HA-E) to the connector CN51
on the indoor controller board.
(2) Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector lines.
(w) Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
How to read curves
Q…Designed amount of fresh air intake
<m3/min>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q <Pa>
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
<Pa>
C…Static pressure of booster fan with
air flow amount Q <Pa>
D…Static pressure loss increase amount
of fresh air intake duct system for air
flow amount Q <Pa>
E…Static pressure of indoor unit with air
flow amount Q <Pa>
Qa…Estimated amount of fresh air
intake without D <m3/min>

11
4-4. 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
BAND CENTER FREQUENCIES, Hz
PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
High
NOTCH
Medium1
Medium2
Low
35
SPL(dB)
33
30
27
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
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
BAND CENTER FREQUENCIES, Hz
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P25VBM-E1
PMFY-P32VBM-E1
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-ER3
High
NOTCH
Medium1
Medium2
Low
37
SPL(dB)
36
34
32
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
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
BAND CENTER FREQUENCIES, Hz
PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3
High
NOTCH
Medium1
Medium2
Low
39
SPL(dB)
37
35
33
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
UNIT
1.5m
MICROPHONE
CEILING

12
5OUTLINES AND DIMENSIONS
Details of fresh air intake hole
Knockout
4-W2.8 Burring hole
Fresh air intake hole
110
230
235 or more
110
Suspension bolt(M10 or W 3/8)
Panel(grille):PMP-40BM(W)
Installation space required around indoor unit
mounting plate
176
Panel(grille):PMP-40BM(W)
Lower view
60 40
177580243
Top
Air outlet(lower)
46
43
2828
20
26
20
53
69 247
30
Right side
Outer line of grille
Center of unit
75926
811 suspension bolt pitch74.5
960 ceiling opening20 20
1000outer side of grille
17.517.5
45
340 Suspension bolt pitch
45
430 Ceiling opening
470 Outer side of grille
20 20
74.5
Terminal block for power supply
Terminal block for transmission
812
96
Left side
Front drain pan
Electrical box
Drainage pipe PVC pipe:VP-20[I.D.W26]
Refrigerant pipe(gas) O.D.W12.7
Refrigerant pipe(liquid) O.D.W6.35
Ceiling panel
Drain pan Ceiling
panel
O.D.W12.7(1/2") PVC pipe:VP-20[O.D.W26(1")] O.D.W6.35(1/4") O.D.W43
Drainage piping
Gas pipe Liquid pipe Pipe cover
Refrigerant piping
1000 outer side of grille
470 outer side of grille
W50
(56)
230
(96)
(20)
(10)
302
254
198
141 759
395
90
W122
W
100
108
250 288.5
Same line
Terminal block for MA remote controller
PMFY-P20VBM-E PMFY-P20VBM-E1 PMFY-P20VBM-E#2 PMFY-P20VBM-ER3
PMFY-P25VBM-E PMFY-P25VBM-E1 PMFY-P25VBM-E#2 PMFY-P25VBM-ER3
PMFY-P32VBM-E PMFY-P32VBM-E1 PMFY-P32VBM-E#2 PMFY-P32VBM-ER3
PMFY-P40VBM-E PMFY-P40VBM-E1 PMFY-P40VBM-E#2 PMFY-P40VBM-ER3
Unit : mm

13
WIRING DIAGRAM
6
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
NAME
NAME
SYMBOL
I.B
SYMBOL
MF
MV
DP
DS
TB2
TB5
TB15
TH21
TH22
TH23
LEV
POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMPERATURE DETECTION
(0/15k, 25/5.4k)
PIPE TEMPERATURE DETECTION/LIQUID
(0/15k, 25/5.4k)
PIPE TEMPERATURE DETECTION/GAS
(0/15k, 25/5.4k)
FAN MOTOR
VANE MOTOR
DRAIN PUMP
DRAIN SENSOR
TERMINAL
BLOCK
THERMISTOR
LINEAR EXPANSION VALVE
A.B
CN25
CN27
CN32
CN41
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE
X1
T
LED1
LED2
SW1
SW5
SW11
SW12
SW14
HUMIDIFIER
DAMPER
REMOTE SWITCH
HA TERMINAL-A
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN PUMP
MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH NO.
INDOOR CONTROLLER BOARD
CONNECTOR
SWITCH
VARISTOR
FUSE(6.3A/250V)
AUX.RELAY
TRANSFORMER
POWER SUPPLY(I.B)
POWER SUPPLY(I.B)
CIRCUIT BOARD
SWITCH
[ LEGEND ]
NOTES:
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.(Transmission wire is non-polar.)
4. Symbol [S] of TB5 is the shield wire connection.
5. Symbols used in wiring diagram above are, : terminal block, : connector.
6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the table above.
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.
CN32
I.B
TH23
TH21
CN21
(WHT)
LIQUID
CN29
(BLK)
GAS
CN20
(RED)
INTAKE
TH22
CN31
(WHT)
DRAIN
6
4
DS
(SHIELD) M1 M2
TB5
TO OUTDOOR UNIT
BC CONTROLLER
DC24-30V
CN2M
(BLU)
M-NET
REMOTE CONTROLLER
5
FUSE
MV
LEV
MF
PULL BOX
1
5
1
5
CN51
(WHT)
CENTRALLY
CONTROL
1
HA
CN41
(WHT)
(RED)
ADDRESS
CN81CN42
ADDRESS
(RED)
(WHT)
REMOTE
31
CN27
CN25
0FF
65432109876543211 1
0N
2345
ZNR
X1
(RED)
CND
(YLW)
CNP
0FF
0N
SW2 SW3 SW4
DP
SWC
(RED)
ADDRESS
CN43
(RED)
ADDRESS
CN82
A.B
BRANCH
SW14
10ths
DIGIT
1s
DIGIT
SW11SW12
TB2 L
CN60
(WHT)
LEV
CN6V
(GRN)
VANE
RED
BLU
BLU
BLU
BLU
BRN
ORN
YLW
RED
WHT
BRN
RED
ORN
YLW
GRN
(WHT)
FAN
POWER
D.U.M
4
8
12345678910
SW1
*See fig:1
No.
240V
SW5
220V
CN52
(GRN)
REMOTE
INDICATION
SWITCH
RED BLU
BLU BLU
N
GRN/YLW
INDOOR UNIT
TO NEXT
(15A) (15A)
BREAKERFUSE
~/N 220-230-240V 50Hz
220V 60Hz
POWER SUPPLY
0N
0FF
654321
0N
0FF
654321
0N
0FF
654321
123456
0FF
0N
LED1
LED2
PE
123456
0FF
0N
123456
0FF
0N
123456
0FF
0N
0N
0FF
654321
10987
10987
10987
10987
3
1
1
3
4312 21 345678
1
2
2
1
5
4
3
2
1
1
2
3
4
5
6
6
5
4
3
2
1
1
2
1
2
1
2
1
2
3
21
213 654
1
2
3
4
1
2
3
4
5
6
7
8
<1>
P20VBM
SW2
MODELS
P25VBM
P32VBM
P40VBM
SW3
X1
T
000
12
TB15
CN3A
(BLU)
REMOCON
21
TO MA-REMOTE CONTROLLER
DC8.7-13V
ORN ORN
Mark
LED1
LED2
Meaning
Main power supply
Function
Power supply for
MA-Remote controller
LED on indoor board for service
Main power supply(Indoor unit:220-240V)
power on Lamp is lit.
Power supply for MA-Remote controller
on Lamp is lit.

14
FAN
(WHT)
LED1
LED2
CN2M
(BLU)
M-NET
BLU BLU
TB5
TB2
PULL BOX FUSE
(15A)
BREAKER
(15A)
(SHIELD)
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
CN3A
(BLU)
REMOCON
ORN ORN
TB15
TO MA- REMOTE CONTROLLER
DC8.7-13V
POWER SUPPLY
~ / N
220-240V 50Hz
220V 60Hz
TO NEXT
INDOOR UNIT
CN29
(BLK)
GAS
CN21
(WHT)
LIQUID
CN20
(RED)
INTAKE
CN60
(WHT)
LEV
CN52
(GRN)
REMOTE
INDICATION
CN6V
(GRN)
VANE
CN31
(WHT)
DRAIN
CN25
CN27
12345678910
SW3
123456
SW2
12345
SW4
ON
OFF
ON
OFF
(RED)
ADDRESS
CN81
(RED)
ADDRESS
CN42
(WHT)
REMOTE
SWITCH
CN32
M
1~
DP X1
CNP
(YLW)
D.U.M
CND
(RED)
POWER
FUSE
T
RED
BLU
BLU
BLU BRN
RED
ORN
YLW
GRN
BLU
BRN
ORN
YLW
RED
WHT
CN51
(WHT)
CENTRALLY
CONTROL
1
5
RED
BLU
GRN / YLW
*See fig :+1
8
4
SW14
SWC
BRANCH
No.
SW11
1s
DIGIT
SW12
10ths
DIGIT
12345678910
SW1
SW5
240V220V
(RED)
ADDRESS
CN82
(RED)
ADDRESS
CN43
A.B
I.B
MODELS
P20VBM
SW2
123456
ON
OFF
P25VBM
123456
ON
OFF
P32VBM
123456
ON
OFF
P40VBM
123456
ON
OFF
SW3
1234567
ON
OFF
1234567
ON
OFF
123456
ON
OFF
123456
7
7
8
8
8
8
9
9
9
9
10
10
10
10
ON
OFF
<+1>
[LEGEND]
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
CONNECTOR HUMIDIFIER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
SWITCH CAPACITY CODE
MODE SELECTION
MODEL SELECTOR
ZNR VARISTOR
X1 AUX.RELAY DRAIN PUMP
FUSE FUSE (6.3A / 250V)
LED1 POWER SUPPLY(I.B)
LED2 POWER SUPPLY(I.B)
T TRANSFORMER
SYMBOL NAME
TH21
DS
MF
MV
DP
THERMISTOR
ROOM TEMP. DETECTION
(0/15k , 25/5.4k )
PIPE TEMP. DETECTION / LIQUID
(0/15k
, 25/5.4k )
PIPE TEMP. DETECTION / GAS
(0/15k
, 25/5.4k )
TH22
TH23
DRAIN SENSOR
FAN MOTOR
VANE MOTOR
DRAIN PUMP
TB2
TB5
TB15
TRANSMISSION
MA-REMOTE CONTROLLER
TERMINAL
BLOCK
POWER SUPPLY
A.B CIRCUIT BOARD
SW1
SW5
SW11
SW12
MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
SW14 BRANCH No.
SWITCH
LEV LINEAR EXPANSION VALVE
MF
1
63
MS
3~
LN
M1 M2
S
12 13
1 2
3
1
2
1
2
1
DS
TH23
TH22
2
1
6
1
TH21
t°
LEV
t°
t°
t°
M
MV
6
1
1
51
5
2
1
2
1
M
843 11 1
8
1
4
1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
1
3
3
1U
Mark Meaning Function
Power supply for
MA-Remote controller
Main power supply (Indoor unit:220-240V)
Power on Lamp is lit.
LED on indoor board for service
LED1 Main power supply
Power supply for MA-Remote controller
on Lamp is lit.
LED2


NOTES:
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 controllerwire is non-polar.)
3. In case of using M-NET, please connect to TB5. (Transmission wire is non-polar.)
4. Symbol [S] of TB5 is the shield wire connection.
5. Symbols used in wiring diagram above are, :terminal block, :connector.
6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to
the table above.
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.
PMFY-P20VBM-E1PMFY-P25VBM-E1PMFY-P32VBM-E1PMFY-P40VBM-E1

15
MODELS
P20VBM
SW2
123456
ON
OFF
P25VBM
123456
ON
OFF
P32VBM
123456
ON
OFF
P40VBM
123456
ON
OFF
SW3
1234567
ON
OFF
1234567
ON
OFF
123456
ON
OFF
123456
7
7
8
8
8
8
9
9
9
9
10
10
10
10
ON
OFF
<1>
[LEGEND]
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
SWE
CONNECTOR HUMIDIFIER
DAMPER
REMOTE SWITCH
A.B CIRCUIT BOARD
SW1
SW5
SW11
SW12
MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
SW14 BRANCH No.
CENTRALLY CONTROL
REMOTE INDICATION
SWITCH
SWITCH
CAPACITY CORD
MODE SELECTION
MODEL SELECTOR
ZNR VARISTOR
DRAIN UP MACHINE ( TEST MODE )
X1 AUX.RELAY
FUSE FUSE (T6.3AL 250V)
LED1 POWER SUPPLY (I.B)
LED2 POWER SUPPLY (I.B)
SYMBOL NAME
TH21
DS
MF
MV
DP
THERMISTOR ROOM TEMP. DETECTION
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / LIQUID
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / GAS
(0°C/15kΩ, 25°C/5.4kΩ)
LEV LINEAR EXPANSION VALVE
TH22
TH23
DRAIN SENSOR
FAN MOTOR
VANE MOTOR
DRAIN PUMP
DRAIN PUMP
TB2
TB5
TB15
TRANSMISSION
MA-REMOTE CONTROLLER
TERMINAL
BLOCK
POWER SUPPLY
NOTES:
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. (Transmission 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 table below.
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.
Mark Meaning Function
Power supply for
MA-Remote controller
Main power supply (Indoor unit:220-240V)
Power on →Iamp is lit
LED on indoor board for service
LED1 Main power supply
Power supply for MA-Remote controller
on →Iamp is lit
LED2
SWE
ON OFF
CN2M
( BLU )
M-NET
CN3A
( BLU )
REMOCON
TB5
(SHIELD)
M1 M2 TB2
TB15
1S
TH23
TH22
CN20
( RED )
INTAKE
CN60
( WHT )
LEV
CN52
( GRN )
REMOTE
INDICATION
CN6V1
( GRN )
VANE
TH21
CNMF2
( WHT )CNMF1
( WHT )
CN31
( WHT )
DRAIN
CN44
( WHT )
LIQUID
/ GAS
CN25
( WHT )
CN27
( RED )
ADDRESS
CN81 ( RED )
CN42
( RED )
ADDRESS
CN32 ( WHT )
REMOTE SWITCH
X1
CNP
( YLW )
D.U.M
CND
( BLK )
FUSE
DSA
ZNR01 DC311
~ 339V
ZNR02
U
CN51
( WHT )
CENTRALLY
CONTROL
CN41
( WHT )
HA
4
8
5
5
LEV
M
DS
DP
t°
t°
t°
t°
2LN
12345678910
SW3
123456
SW2
12345
SW4
81
51
513
6
1
6
1
5
1
4
1
2
1
2
1
2
1
4
1
1
3
3
1
3
1
31
2
1
21
1
4
1357
8642
I.B
M
1~
M
U
MS
3~
PULL BOX FUSE
( 15A)
BREAKER
( 15A)
POWER SUPPLY
~ / N
220-240V 50Hz
220V 60Hz
TO NEXT
INDOOR
UNIT
BLU
BRN
ORN
YLW
RED
WHT


SW14
SWC
BRANCH
No.
SW11
1s
DIGIT
SW12
10ths
DIGIT
12345678910
SW1
SW5
240V220V
(RED)
ADDRESS
CN82
(RED)
ADDRESS
CN43
A.B
8
1
4
1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
TO MA- REMOTE
CONTROLLER
DC8.7-13V
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
RED
BLU
GRN
/
YLW
MF
MV
ORN
*See fig : 1
ORN
BLU
BLU
BLU
BLU
LED2
LED1
GRN
YLW
ORN
RED
BRN
BLK
PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2
PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3

16
REFRIGERANT SYSTEM DIAGRAM7
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
+1+2
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
Unit:mm(inch)
Unit:mm
:12.7(1/2")
:6.35(1/4")
Item
Service Ref.
Capillary tube +1
Capillary tube +2
O.D.:4.6 %I.D.:3.4 %1200 O.D.:3.6 %I.D.:2.4 %1200
O.D.:3.6 %I.D.:2.4 %180
PMFY-P20, P25, P32, P40VBM-E
PMFY-P20, P25, P32, P40VBM-E1
PMFY-P20, P25, P32, P40VBM-E#2
PMFY-P20, P25, P32, P40VBM-ER3
PMFY-P20, P25VBM-E
PMFY-P20, P25VBM-E1
PMFY-P20, P25VBM-E#2
PMFY-P20, P25VBM-ER3
PMFY-P32, P40VBM-E
PMFY-P32, P40VBM-E1
PMFY-P32, P40VBM-E#2
PMFY-P32, P40VBM-ER3
PMFY-P20VBM-E PMFY-P20VBM-E1 PMFY-P20VBM-E#2 PMFY-P20VBM-ER3
PMFY-P25VBM-E PMFY-P25VBM-E1 PMFY-P25VBM-E#2 PMFY-P25VBM-ER3
PMFY-P32VBM-E PMFY-P32VBM-E1 PMFY-P32VBM-E#2 PMFY-P32VBM-ER3
PMFY-P40VBM-E PMFY-P40VBM-E1 PMFY-P40VBM-E#2 PMFY-P40VBM-ER3

17
8TROUBLE SHOOTING
8-1. HOW TO CHECK THE PARTS
PMFY-P20VBM-E PMFY-P20VBM-E1 PMFY-P20VBM-E#2 PMFY-P20VBM-ER3
PMFY-P25VBM-E PMFY-P25VBM-E1 PMFY-P25VBM-E#2 PMFY-P25VBM-ER3
PMFY-P32VBM-E PMFY-P32VBM-E1 PMFY-P32VBM-E#2 PMFY-P32VBM-ER3
PMFY-P40VBM-E PMFY-P40VBM-E1 PMFY-P40VBM-E#2 PMFY-P40VBM-ER3
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30)
Disconnect the connector then measure the resistance valve with a tester.
Refer to the next page for a detail.
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20~30)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0~60)
Vane motor (MV)
Linear expansion
valve(LEV)
Drain pump (DP)
Drain sensor (DS)
Refer to the next page for the details.
Refer to the next page for the details.
Refer to the next
page for the details.
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
1
3
Blue
Blue
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
200$10%
(1)-(5)
White-Red
(2)-(6)
Yellow-Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown
NormalConnector Abnormal
380$7% Open or short
Normal Abnormal
400~480Open or short
Orange
Red
White
Blue
Brown
Yellow





MV
M
Orange
Red
Brown
Brown — Yellow
Brown — Red
Brown — Orange
Brown — Green
Green
Yellow





18
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=3480 ± 2%
Rt=15exp { 3480( ) }
0:: 15k'
10:: 9.6k'
20:: 6.3k'
25:: 5.4k'
30:: 4.3k'
40:: 3.0k'
Drain sensor (DS)
Thermistor R0=6.0k' ± 3%
Fixed number of B=3390 ± 2%
Rt=6exp { 3390( ) }
0:: 6 k'
10:: 3.9k'
20:: 2.6k'
25:: 2.2k'
30:: 1.8k'
40:: 1.3k'
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.
<Connection between the indoor controller board and the 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 colour of
the lead wire.
-20 0 20 40 60 80
< Thermistor for drain sensor >
Temperature ()
0
1
2
3
4
5
6
7
8
9
10
Resistance (k)
1
273+t
1
273
Thermistor for
lower temperature

19
<Output pulse signal and the valve operation>
2Linear expansion valve operation
3Trouble 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)
Closing a valve : 1 →2 →3 →4 →1
Opening a valve : 4 →3 →2 →1 →4
The output pulse shifts in above order.
• When linear expansion valve operation stops, all output phase
become OFF.
• 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 sound or vibration occur-
ring from the linear expansion valve : however, when the pulse
number moves from Eto Aor when the valve is locked, more
sound can be heard than normal situation.
• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver to the linear expansion valve.
6
5
4
3
2
1
LED1k
Symptom Check points
Operation circuit
failure 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 does not 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 expan-
sion valve is closed completely and if there
are some leaking, detecting temperature of
the thermistor will go lower. If the detected
temperature is much lower than the tem-
perature 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.
Thermistor
(Liquid pipe)
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 expan-
sion valve.
Exchange the linear expan-
sion valve.
If large amount of refriger-
ant 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) with a tester. It is normal if
the resistance is in the range of 200 "± 10%.
Short or breakage
of the motor coil of
the linear expansion
valve
Output
(Phase)
Output
1234
{1ON OFF OFF ON
{2ON ON OFF OFF
{3OFF ON ON OFF
{4OFF OFF ON ON

20
8-2. TROUBLE SHOOTING
Notes
· High voltage is applied to the connecter (FAN)(CNMF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (FAN)(CNMF1, 2) for the motor with the power supply on, doing so may result in damage
to the board.
(FAN)
PMFY-P20/25/32/40VBM-E PMFY-P20/25/32/40VBM-E1
(CNMF1, 2)
PMFY-P20/25/32/40VBM-E#2 PMFY-P20/25/32/40VBM-ER3
Self check
Symptom : The indoor fan can not rotate.
Turn ON the power supply.
Power supply check
Check the voltage of the indoor controller board with the connector (FAN) (CNMF1, 2)connected to the board.
Approx. 310~340V DC between the connecter < (FAN) (+) and (–) > < (CNMF1)(+) and (CNMF2)(-) >
Check method of indoor fan motor (fan motor / controller board)
Replace the indoor controller board.
Is the voltage normal?


Yes
No
Indoor controller board fuse check
Wiring contact check
Contact of fan motor connector (FAN) (CNMF1,2)
No
No
Wiring recovery
Replace the drain pump.
Is there contact failure?
No
Yes
Yes
Is the fuse normal?
Yes
Is the resistance
between the terminals of
drain pump normal?
Replace the fan motor.
Replace the indoor controller board.
NG
Replace
the fan motor.
Replace the the indoor controler board.
END
OK
Check the operation
NG
Replace the fan motor.
END
OK
Check the operation