ICE MACHINES Q-Model Service Manual

Section 6Electrical SystemCheck Procedure1. Set the toggle switch to OFF.2. Watch the bin switch light on the control board.3. Move the water curtain toward the evaporator. Thebin switch must close. The bin switch light “on”indicates the bin switch has closed properly.Move the water curtain away from the evaporator. Thebin switch must open. The bin switch light “off” indicatesthe bin switch has opened properly.OHM Test1. Disconnect the bin switch wires to isolate the binswitch from the control board.2. Connect an ohmmeter to the disconnected binswitch wires.3. Cycle the bin switch open and closed numeroustimes by opening and closing the water curtain.NOTE: To prevent misdiagnosis:• Always use the water curtain magnet to cycle theswitch (a larger or smaller magnet will affect switchoperation).• Watch for consistent readings when the bin switch iscycled open and closed (bin switch failure could beerratic).Water Curtain Removal NotesThe water curtain must be on (bin switch closed) to startice making. While a freeze cycle is in progress, the watercurtain can be removed and installed at any time withoutinterfering with the electrical control sequence.If the ice machine goes into harvest sequence while thewater curtain is removed, one of the following willhappen:• Water curtain remains off:When the harvest cycle time reaches 3.5 minutesand the bin switch is not closed, the ice machinestops as though the bin were full.• Water curtain is put back on:If the bin switch closes prior to reaching the 3.5-minute point, the ice machine immediately returns toanother freeze sequence prechill.Part No. 80-1100-3 6-39