Fan motor
1. Test using the controller’s indicator lights.
Note: Fan pressure control connection must be jumped to perform this test.
Put the controller into test mode (depress Off for 3 seconds then depress Clean for 3
seconds). At the end of the test cycle, the fan motor will be powered and the Condenser Fan
motor indicator light will be on. The fan motor should start and run at that time. If it does not,
repeat the test but check the voltage to the fan motor, it must receive full voltage at the fan
motor lead connection at the end of the test. If there is voltage and the motor does not operate,
replace the motor. If there is no voltage, check the controller high voltage harness connection.
The fan motor lead is the top wire. Check voltage from it to ground, at the end of the test, when
the fan motor indicator light is On, there must be voltage from this pin to ground. Note: high
voltage power is supplied to the bottom pin from the contactor line. Refer to the machine wiring
diagram as needed.
2. Test using an ohmmeter. Disconnect electrical power. Unplug fan motor from harness.
Measure fan motor winding resistance. If open, replace the fan motor.
September 2006 Page 63
Test Procedures - Loads
This light is ON when the
fan motor should be in
operation.
Fan Pressure Control
must CLOSE to operate
fan motor.