Scotsman C2648 - Purge Valve Testing; Indicator Lights Test; Valve Coil Resistance Note

C2648 Prodigy and Prodigy Plus Service Manual
January 2015
Page 48
This light will be ON when the Purge Valve is ON.
Purge valve
Test using the controller’s indicator lights.
1. Shut unit off by holding the Off button for 3 seconds.
2. Wait four minutes. Push and release the On button, observe the Purge Valve indicator light. As the unit
drains the reservoir, the purge valve will be powered. When it gets power, the indicator light will be ON. If
the purge valve does not open to drain the reservoir when its indicator light is on, do a voltage check.
3. Shut the unit down by holding the Off button in for 3 seconds.
4. Unplug the harness connection from the purge valve. Wait four minutes.
5. Push and release the On button to restart the machine. As the unit drains the reservoir, the purge valve
connection should receive full voltage. If it does, the purge valve should be replaced. If there is no voltage,
check voltage from the controller. The purge valve pin is 3 (dump valve on wiring diagram).
Note: The coil of this valve is internally rectied, and will normally show innite resistance when tested
with an ohmmeter.