Manitowoc QF0400 Service Manual

Also see for QC0700: Installation, use & care manual Service manual Building instructions Technician's handbook

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Manitowoc QF0400 Service Manual Manual pdf 63 page image

Part No. 80-1214-3 6-1Section 6Electrical SystemEnergized Parts ChartsQF400/QC700/QF800When the toggle switch is placed in the ICE position, the following must occur prior to starting an ice making cycle.A.)The bin level probe must be open (Bin Level light off). If the probe is closed (Bin Level light on) when the toggle switch is moved to ICE, thecontrol system waits until the bin level probe opens (Bin Level light off) before starting an ice making sequence.If the bin level probe is disconnected from the control board, the ice machine will not start and will continuously flash the Bin Level light.The ice machine will remain off until:1.The bin level probe is reconnected to the circuit board2.The toggle switch is moved from ICE to OFF, then back to ICE.B. The water level probe must be closed (Water Level light on) to start the compressor.If the water level probe is open (Water Level light off), the control system waits until the water level probe closes before starting the compressor.QC700/QF800Condenser Fan Motor -The fan motor is wired through a fan cycle pressure control. The fan motor will cycle on/off depending on discharge pressure8-Minute Lockout - The Bin Level light will flash until the 8-minute lockout expires.After the 8-minute lockout expires, the Bin Level light will de-energize.The 8-minute lockout time can be overridden by moving the ICE/OFF/CLEAN toggle switch from ICE to OFF, then back to ICE.Ice MakingSequence OfOperationControl Relays SensorsLengthOf Time1 2 3 4 WaterLevelProbeBin LevelProbeTemperatureSensorGearMotorSpeedContactorCoilDumpValveGearMotorFloatValveCoilSTART-UP1A. WaterFlushOff On On OffNotSensing forWater LevelSensing NoIce ContactNot SensingforTemperatureSensingfor GearMotorSpeed45 Seconds1B. Water Fill Off Off On On Sensing forWater LevelSensing NoIce ContactNot SensingforTemperatureSensingfor GearMotorSpeedUntil WaterContactsWater LevelProbeFREEZESEQUENCE2. FreezeOn Off On On Sensing forWater LevelSensing NoIce ContactSensing for245 °FImmediately.Sensing for155° F after 30min. of IceMakingSensingfor GearMotorSpeedUntil IceContacts BinLevel Probe for30 ContinuousSecondsAUTOMATICSHUT-OFF3A. Ice RunOutOff Off On On Sensing forWater LevelSensingIce ContactNot SensingforTemperatureSensingfor GearMotorSpeed45 Seconds3B. DrainEvaporator Off On Off OffNotSensing forWater LevelSensingIce ContactNot SensingforTemperatureNotSensingfor GearMotorSpeed45 SecondsAUTOMATICSHUT-OFF Off Off Off OffNotSensing forWater LevelSensingIce ContactNot SensingforTemperatureNotSensingfor GearMotorSpeedUntil Ice NoLongerContacts BinLevel ProbeRevised 8/2003Downloaded from www.Manualslib.com manuals search engine