Test Procedure - Inlet Water Solenoid Valve - Scotsman Prodigy C0322 Technical & Service Manual

Test Procedure - Inlet Water Solenoid Valve

1. Test using the controller's indicator lights.
Shut unit off by holding the Off button for 3 seconds. Wait four minutes.
Push and release the On button, observe the Water Solenoid indicator light. After the unit drains the reservoir,
the inlet water valve will be powered to refill the reservoir. When it gets power, the indicator light will be ON.
If the water valve does not open to fill the reservoir when its indicator light is on, do a voltage check. Shut the
unit down by holding the Off button in for 3 seconds. Unplug the harness connection from the inlet water valve.
Wait four minutes.
Push and release the On button to restart the machine. After the unit drains the reservoir, the inlet water valve
connection should receive full voltage. If it does, the inlet water valve should be replaced.
If there is no voltage, check voltage from the controller. The inlet water solenoid valve pin is 7. If there is
voltage from that pin to ground, or on 220 volt models to the other power leg, but low voltage at the valve
harness connection, the harness has a broken wire or poor connection and must be replaced. If the voltage to
ground or other leg is low, the controller should be replaced.
2. Test using an ohmmeter. Disconnect electrical power. Unplug coil from harness. Measure coil resistance. If
open, replace the inlet water solenoid.
Light is ON when inlet water
solenoid is in operation.
January 2015 Page 63
8 - Fan Motor
Brown
Red
7 - Inlet Water Sol
White
6 - Water Pump
Blue
Brown
5 - Hot Gas Valve
White
4 - Compressor
Yellow
3 - Purge Valve
Red
Black
1 - Line In