ICE MACHINES Q-Model Service Manual

Electrical System Section 6Diagnosing An Ice Machine That Will Not Run! WarningHigh (line) voltage is applied to the control board(terminals #55 and #56) at all times. Removingcontrol board fuse or moving the toggle switch toOFF will not remove the power supplied to thecontrol board.Step Check Notes1 Verify primary voltage supply to ice Verify that the fuse or circuit breaker is closed.machine.2 Verify the high-pressure cutout is closed. The H.P.C.O. is closed if primary power voltage is present at terminals#55 and #56 on the control board.3 Verify control board fuse is OK. If the bin switch light functions, the fuse is OK.4 Verify the bin switch functions properly. A defective bin switch can falsely indicate a full bin of ice.5 Verify ICE/OFF/CLEAN toggle switch A defective toggle switch may keep the ice machine in the OFF mode.functions properly.6 Verify low DC voltage is properly Loose DC wire connections may intermittently stop the ice machine.grounded.7 Replace the control board. Be sure Steps 1-6 were followed thoroughly. Intermittent problems arenot usually related to the control board.NOTE: Refer to wiring diagram on Page 6-55 for component and sequence identification.6-54 Part No. 80-1100-3