Troubleshooting; Qm45/Q130/Q170/Q210/Q270; Diagnosing An Ice Machine; That Will Not Run - Manitowoc SM050 Technician's Handbook

Undercounter ice machines
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QM45/Q130/Q170/Q210/Q270

DIAGNOSING AN ICE MACHINE

THAT WILL NOT RUN

High (line) voltage is applied to the control board
(terminals #2 and #4) at all times. Removing
control board fuse or moving the toggle switch to
OFF will not remove the power supplied to the
control board.
1. Verify primary voltage is supplied to ice machine
and the fuse/circuit breaker is closed.
2. Verify control board fuse is okay.
3. If the bin switch light functions, the fuse is okay.
4. Verify the bin switch functions properly. A
defective bin switch can falsely indicate a full bin
of ice.
5. Verify ON/OFF/WASH toggle switch functions
properly. A defective toggle switch may keep the
ice machine in the OFF mode.
6. Verify low DC voltage is properly grounded. Loose
DC wire connections may intermittently stop the
ice machine.
7. Replace the control board.
8. Be sure Steps 1 – 5 were followed thoroughly.
Intermittent problems are not usually related to
the control board.
Part Number 8001119 10/19

Troubleshooting

!
Warning
99

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