Scotsman Prodigy Series - Manual (Page 57)

January 2015 Page 57
Test Procedures - 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.
Fan Pressure Control, must CLOSE to
operate fan motor.
This light is ON when the fan motor
should be operating.
8 - Fan Motor
7 - Inlet Water Sol
6 - Water Pump
5 - Hot Gas Valve
4 - Compressor
3 - Purge Valve
1 - Line In
Brown
Blue
Yellow
Red
Black
Red
White
Brown
White