Carrier 42NQV025H Service Manual page 87

No. Procedure
7 Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.
• Set the fan speed level to HIGH.
(The unit (compressor) operates
continuously in the above
condition in No. 5.)
Table 11-8-1
Check points
1. Check it is impossible to detect
the voltage (DC 15V) between 3
and 4 of the motor terminals.
2. The motor does not operate or
the fan motor does not rotate with
high speed.
(But it is possible to receive the
signal from the remote controller.)
3. The motor rotates but vibrates
strongly.
– 87 –
FILE NO. SVM-07013
Causes
1. The indoor fan motor is defective.
(Protected operation of P.C. board.)
2. The P.C. board is defective.
3. The connection of the motor
connector is loose.