Manitowoc Ice FLAKE/CHIPLET QF0400 - Manual (Page 121)

Section 6 Electrical System
Part No. 80-1214-3 6-59
Diagnosing An Ice Machine That Will Not
Run
QF400/QC700/QF800/QF2200/QF2300
QF2200/QF2300 - If the gearmotor is energized but no
ice is produced, refer to “Diagnosing a Condensing Unit
That Will Not Run”.
1. Verify primary voltage is supplied to ice machine
and the fuse/circuit breaker is closed.
2. Verify control board fuse is okay. If any control board
lights functions, the fuse is okay.
3. Verify the bin level control is connected to the control
board and the bin level light is off.
4. Verify ICE/OFF/CLEAN toggle switch functions
properly. Place the toggles switch in the ICE and
CLEAN positions and check for energized
components.
5. Verify low DC voltage is properly grounded. Loose
DC wire connections may intermittently stop the ice
machine.
6. Verify water is contacting the water level probes. The
compressor (QF2300 liquid line solenoid valve) will
not energize until water contacts the water level
probes.
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
RFC2085/RFC2385
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
(RFC2085 only) controls 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.
Revised 8/2003