ICE MACHINES Q-Model Service Manual

Electrical System Section 6REMOTE MODELSIce MakingSequence OfOperationSTART-UP 11. Water Purge2. RefrigerationSystemStart-UpFREEZESEQUENCE3. Pre-Chill1. Initial Start-Up or Start-Up After Automatic Shut-OffControl Board RelaysContactor1 2 3 4 5 5A 5BWaterPumpWater FillValvea. HarvestValve(s)b. HPRSolenoidAuto Shut-OffThe ice machine remains off for 3 minutes before it canautomatically restart. The ice machine restarts (steps 1-2) immediately after the delay period, if the bin switch reclosesprior to 3 minutes.Harvest Water PurgeThe circuit board has an adjustable water purge in theharvest cycle. This permits a 15, 30 or 45 second purgecycle.Safety TimersThe control board has the following non-adjustablesafety timers:WaterDumpValvea.ContactorCoilb. LiquidLineSolenoidFREEZE SEQUENCECompressorCondenserFan MotorLengthOf TimeOn Off On On Off Off Off 45 SecondsOff On On Off On On On 5 SecondsOffMay cycleOn/Off duringfirst 45 sec.------------Cycles On,then Off 1Off Off On On On 30 Seconds4. Freeze On more timeLocked OutAfter SixMinutesOff Off On On OnHARVESTSEQUENCE5. Water PurgeOn30 sec. Off,15 sec. OnOn On On On On6. Harvest Off Off On Off On On On7. AUTOMATICSHUT-OFFOff Off Off Off Off Off OffUntil 7 sec.watercontact withice thicknessprobeFactory-setat 45SecondsBin switchactivationUntil binswitch recloses• The ice machine is locked into the freeze cycle forthe first 6 minutes, not allowing the ice thicknessprobe to initiate a harvest sequence.• The maximum freeze time is 60 minutes, at whichtime the control board automatically initiates aharvest sequence (steps 5-6).HARVEST SEQUENCE• The maximum harvest time is 3-1/2 minutes, at whichtime the control board automatically terminates theharvest sequence. If the bin switch is open, the icemachine will go to automatic shut-off (step 7). If thebin switch is closed, the ice machine will go to thefreeze sequence (steps 3-4).6-2 Part No. 80-1100-3