Section 6Electrical System6-36Component Specifications and DiagnosticsFUSESFunctionThe control board fuse(s) stops ice machine operationif electrical components fail causing high amp draw.SpecificationsFuse SpecificationsMain Fuse 250 Volt, 7 AmpTransformer Fuse1 250 Volt, 60 Hz, .125 Amp250 Volt, 50 Hz, .100 Amp1 The transformer fuse is not used on new style dual voltagecontrol boards.Check ProcedureWARNINGHigh (line) voltage is applied to the control board(terminals #55 and #56) at all times. Removingcontrol board fuses or moving the toggle switch toOFF will not remove the power supplied to thecontrol board.1. If the bin switch light is on with the water curtainclosed, both fuses are good.WARNINGDisconnect electrical power to the entire icemachine before proceeding.2. Remove the fuse. Check the resistance across thefuse with an ohm meter.Reading ResultOpen (OL) Replace fuseClosed (O) Fuse is goodBIN SWITCHFunctionBin switch operation is controlled by movement ofthe water curtain. The bin switch has two mainfunctions:1. Terminating the harvest cycle and returning theice machine to the freeze cycle.This occurs when the bin switch is opened and closedagain within 7 seconds during the harvest cycle.2. Automatic ice machine shut-off.If the storage bin is full at the end of a harvest cycle,the sheet of cubes fails to clear the water curtainand holds it open. After the water curtain is heldopen for 7 seconds, the ice machine shuts off.The ice machine remains off until enough ice isremoved from the storage bin to allow the sheetof cubes to drop clear of the water curtain. As thewater curtain swings back to the operatingposition, the bin switch closes and the icemachine restarts.ImportantThe water curtain must be ON (bin switch closed)to start ice making.SpecificationsThe bin switch is a magnetically operated reedswitch. The magnet is attached to the lower rightcorner of the water curtain. The switch is attached tothe evaporator mounting bracket.The bin switch is connected to a varying D.C. voltagecircuit. (Voltage does not remain constant.)NOTE: Because of a wide variation in D.C. voltage,it is not recommended that a voltmeter be used tocheck bin switch operation.
