Check Method Of Dc Fan Motor; How To Check The Components; High Pressure Sensor - Mitsubishi PUHZ-SHW80YAA Service Manual

Check method of DC fan motor (fan motor/outdoor controller circuit board)
Notes
1
· High voltage is applied to the connecter (CNF1) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1) for the motor with the power supply on.
(It causes trouble of the outdoor controller circuit
Self check
2
Symptom: The outdoor fan cannot rotate.
Fuse check
Check the fuse (F5) on outdoor
controller board.
Did the fuse blow?
No
Wiring contact check
Contact of fan motor connector (CNF1)
Is there contact failure?
No
Fan motor check (CNF1)
Is the resistance abnormal?
No
Power supply check (Remove the connector (CNF1))
Measure the voltage in the outdoor controller circuit
TEST POINT 1 : V
DC
TEST POINT 2 : V
CC
Is the voltage normal?
No
Replace outdoor
controller board.
Check the operation.
Fail
Replace the fan motor.

9-5. HOW TO CHECK THE COMPONENTS

<HIGH PRESSURE SENSOR>
Vout (V)
4.5
2.5
0.5
OCH651
Yes
UNIT
FAN MOTOR
Measuring points
pin1–pin4
pin5–pin4
pin6–pin4
pin7–pin4
Replace the fan motor
Yes
(between 1 (+) and 4 ( ) of the fan connector): V
(between 5 (+) and 4 ( ) of the fan connector): V
Yes
OK
END
2.5 5
PRESSURE
(MPaG)
board and fan motor.)
Replace outdoor controller board (C.B)
and fan motor (MF1).
SW75 SW100/SHW80/SW112
BH61J064 BH61J065
Resistance Resistance
1 1
4 4
board.
280–380 V DC
DC
15 V DC
CC
Replace the fan motor.
Yes
Check the operation of fan.
Fail
Replace the outdoor controller board.
WHT
BLU
Vout
BLK
63HS
3-1 : 5 V (DC)
2-1 : Output Vout (DC)
OK
END
MULTI
CONTROLLER BOARD
5 V DC
3
2
MICRO
PROCESSOR
1
GND