Scotsman C2648 - Manual (Page 49)

C2648 Prodigy and Prodigy Plus Service Manual
January 2015
Page 49
Only one water pump is ON when the purge valve light is ON
Compressor contactor
Test using the controller’s indicator lights.
1. When the unit is in ice making mode the compressor contactor will have power. Check the Compressor
indicator light, when it is on the compressor contactor will have pulled in. If it is not, do a voltage check.
Place voltmeter leads on the coil of the contactor.
2. There should be full voltage . If there is full voltage present and the contactor has not pulled in, replace the
contactor. If there is no voltage check if the high pressure cut out is open. If the high pressure cut out is
closed, check for voltage from the controller. The contactor pin is 4. Check when the compressor indicator
light is on. There should be voltage. If not, replace the controller. If there is voltage at the controller but not
at the contactor coil, the harness wires or connectors are damaged and must be replaced.
3. Test using an ohmmeter. Test the coil of the contactor for continuity or shorts to ground. Replace if open or
shorted.
4. Check connections and contacts. Be sure connections are tight and that the contacts are not burnt.
Replace any contactor with burnt contacts.