Service manual

Electrical System Section 6
6-26
Part No. 80-1206-3
Diagnosing An Ice Machine That Will Not
Run
ICE MACHINE HEAD SECTION
Q0600C/IB0600C/Q0800C/IB800C/
Q1000C/IB1000C/SU1000C/Q1400C/QDUALC
If the water pump is energized but no ice is produced
refer to condensing unit will not run.
1. Verify primary voltage is supplied to ice machine
head section and the fuse/circuit breaker is closed.
2. Verify control board fuse is okay. If the bin switch or
water level probe light functions, the fuse is okay.
3. Verify all bin switches function properly. A defective
bin switch can falsely indicate a full bin of ice.
4. Verify ICE/OFF/CLEAN toggle switch functions
properly. A defective toggle switch may keep the ice
machine in the OFF mode.
5. Verify low DC voltage is properly grounded. Loose
DC wire connections may intermittently stop the ice
machine.
6. Replace the control board.
Be sure Steps 1-5 were followed thoroughly. Intermittent
problems are not usually related to the control board.
Diagnosing A Condensing Unit That Will
Not Run
CONDENSING UNIT
CVD0675/CVD0875/CVD1075/CVD1285/
CVD1475/CVD1875/CVD2075
If the ice machine water pump is not energized refer to
“Ice Machine Head Section Will Not Run”.
1. Verify primary voltage is supplied to ice machine
condensing unit and the fuse/circuit breaker is
closed.
2. Verify the high-pressure cutout and low-pressure
cutouts are closed. The HPCO and LPCO are
closed if primary line voltage is present at the
contactor coil terminals.
3. Verify line voltage is present at the contactor coil.
4. Verify the contactor contacts are closed and line
voltage is present across all lines.
5. Refer to compressor diagnostics.
!
Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing
control board fuse or moving the toggle switch to
OFF will not remove the power supplied to the
control board.