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Notes
· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give 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 controller circuit
board and fan motor.)
Self check
Symptom : The outdoor fan cannot turn around.
No
Wiring contact check
Contact of fan motor connector (CNF1, CNF2)
Power supply check
Measure the voltage in the outdoor controller circuit
board.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (-) of the fan connector): V
DC
DC280-380V
TEST POINT
2
: V
CC
(between 5 (+) and 4 (-) of the fan connector): V
CC
DC15V
TEST POINT
3
: V
SP
(between 6 (+) and 4 (-) of the fan connector): V
SP
DC1 to 6.5V
The voltage of V
SP
is a value during the fan motor operation.
In the case that the fan motor off, the voltages is 0V.
Fan motor position sensor signal check
Measure the voltage at the TEST POINT
4
(V
FG
), between 7 (+) and 4 (-)
of the fan connector, while slowly turning the fan motor more than one revolution.
Wiring recovery
Trouble of the outdoor controller circuit board
Replacement of the outdoor controller circuit board
Trouble of the fan motor
Replacement of the motor
Dose the voltage repeat DC0V and DC15V?
Replacement of the outdoor controller circuit board
Is the voltage normal?
Is there no contact failure?
Yes
1
2
No
Yes
No
Yes
Check method of DC fan motor (fan motor / outdoor controller circuit board)
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