Scotsman C2648 - SERVICE MANUAL 11-2010 Service Manual page 51

C2648 Service Manual
Test Procedures - Loads
Purge 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 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. Shut
the unit down by holding the Off button in for 3 seconds. Unplug the harness connection from the purge
valve. Wait four minutes. 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 rectified, and will normally show infinite resistance when tested
with an ohmmeter.
This light will be ON when
the Purge Valve is in
November 2010
Page 28