112
Notes
· High voltage is applied to the connecter (CNF1,2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1,2) for the motor with the power supply on.
(It causes trouble of the outdoor multi controller circuit
board and fan motor.)
Self check
Symptom : The outdoor fan cannot rotate.
1
2
Check method of DC fan motor (fan motor/outdoor multi controller circuit board)
Power supply check (Remove the connector (CNF1,2))
1
While the breaker is OFF, disconnect the compressor wirings (U/V/W) from the outdoor power circuit board.
2
While the breaker is OFF, disconnect the fan motor connector CNF1,2.
3
When 5 minutes have passed since turning ON the breaker, turn SW7-1 ON.
4
Check the voltage of the outdoor multi controller circuit board.
Measure the voltage in the outdoor controller circuit board.
TEST POINT 1: VDC (between 1 (+) and 4 (
−
) of the fan connector): 310–350 V DC (Y)
: VDC (between 1 (+) and 4 (
−
) of the fan connector): 280–340 V DC (when ACTM stops), 350 V DC (when ACTM is operating) (V)
TEST POINT 2: VCC (between 5 (+) and 4 (
−
) of the fan connector): VCC 15 V DC
TEST POINT 3: VCC (between 6 (+) and 4 (
−
) of the fan connector): VCC 0–6.5 V DC
No
Fail
Fail
Wiring contact check
Contact of fan motor connector (CNF1,2)
Fuse check
Check the fuse (F500) on outdoor
multi controller circuit board.
Recover wiring.
Replace the outdoor multi controller circuit board.
Replace the fan motor.
Replace the outdoor multi
controller circuit board.
Replace the fan motor.
Is the voltage normal?
Is there contact failure?
Yes
Yes
No
Did the fuse blow?
No
Yes
Check the operation of fan.
END
Yes
OK
Check the operation.
END
OK
Replace the outdoor multi controller
circuit board (MULTI.B.) and the
defective fan motor.
Disconnect the FAN motor connector and
measure the resistance of connector pins.
Refer to “8-7. HOW TO CHECK THE PARTS”.
Note: Turn SW7-1 OFF after the troubleshooting completes.
OCH632A
Summary of Contents for PUMY-P112VKM3
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