ICE MACHINES Q-Model Service Manual

Electrical System Section 6DIAGNOSING ICE THICKNESS CONTROL CIRCUITRYIce Machine Does Not Cycle Into Harvest When Water Contacts The Ice Thickness Control ProbeStep 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Waituntil the water starts to flow over the evaporator.Step 2 Clip the jumper wire leads to the ice thickness probe and any cabinet ground.ICE THICKNESS PROBECLEAN LIGHTWATER LEVEL LIGHTBIN SWITCH LIGHTHARVEST/SAFETY LIMIT LIGHTEVAPORATORGROUNDSV3010JUMPER WIRESV1588AFigure 6-22. Step 2Step 2 Jumper wire connected from probe to groundMonitoring of Harvest LightCorrectionThe harvest light comes on, and 6-10 seconds later, icemachine cycles from freeze to harvest.The harvest light comes on but the ice machine stays in thefreeze sequence.The harvest light does not come on.The ice thickness control circuitry is functioning properly. Donot change any parts.The ice thickness control circuitry is functioning properly. Theice machine is in a six-minute freeze time lock-in. Verify step 1of this procedure was followed correctly.Proceed to Step 3, below.Step 3 Disconnect the ice thickness probe from the control board at terminal 1C. Clip the jumper wire leads toterminal 1C on the control board and any cabinet ground. Monitor the harvest light.ICE THICKNESS PROBECLEAN LIGHTEVAPORATORJUMPER WIREWATER LEVEL LIGHTBIN SWITCH LIGHTHARVEST/SAFETY LIMIT LIGHTGROUND1CSV3011SV1588GFigure 6-23. Step 3Step 3 Jumper wire connected from control board terminal 1C to groundMonitoring of Harvest LightCorrectionThe harvest light comes on, and 6-10 seconds later, ice The ice thickness probe is causing the malfunction.machine cycles from freeze to harvest.The harvest light comes on but the ice machine stays in thefreeze sequence.The harvest light does not come on.The control circuitry is functioning properly. The ice machine isin a six-minute freeze time lock-in (verify step 1 of thisprocedure was followed correctly).The control board is causing the malfunction.6-48 Part No. 80-1100-3