Manitowoc Ice QF0400, QF2300, QF0800, QC0700, QF2200 service manual Section Troubleshooting, Checklist

Section 5

Troubleshooting

Checklist

Problem	Possible Cause	To Correct
Ice machine does not operate.	No electrical power to the ice machine.	Replace the fuse/reset the breaker/turn on
		main power switch/plug cord into receptacle.
	Control Board fuse open
	ICE/OFF/CLEAN toggle switch set improperly.	Move toggle switch to the ICE position.
	8 minute lockout has not expired.	Bin level light will flash to indicate 8 minute
		lockout has not expired. Refer to Sequence of
		Operation
	Bin level sensor is disconnected or is	Connect bin level sensor or remove ice
	contacting the ice.	contacting probe.
	High Pressure Control is open.	Clean condenser, check fan motor, check high
		pressure control operation. Check for
		refrigerant overcharge or non-condensables in
		system.
Gear Motor runs but	Water reservoir is empty. (Water must contact	Open water service valve or clean float valve
compressor will not start.	the water level probe to start the compressor).	screen. Check water level probe
	Water level probes out of position	Correct water level probe position.
Remotes Only	No electrical power to condensing unit	Replace the fuse/reset the breaker/turn on the
		main power switch.
Ice machine stops and can be	The SafeGuard feature is stopping the ice	Refer to “SafeGuard Feature” in this section
restarted by moving the toggle	machine.
switch to OFF and back to ICE.
Ice quality is poor.	Poor incoming water quality.	Test the quality of the incoming water and
		check filter.
	Water filtration is poor.	Replace filter.
	Incoming water temperature is above 90°F	Correct water temperature. (Verify check/
	(32.3°C)	mixing valves in other equipment are working
		properly). Connect the ice machine to a cold
		water supply.
	Water pressure is low.	Water pressure must remain between 20 and
		80 psig.
	Water softener is working improperly (if	Repair the water softener.
	applicable).
Low ice capacity.	Water float valve screen is dirty.	Remove and clean the filter screen.
	Incoming water supply is shut-off.	Open the water service valve.
	Water dump valve is leaking.	Clean the dump valve.
	Water Pressure is low.	Water pressure must remain between 20 and
		80 psig.
	Incoming water temperature is above 90°F	Correct water temperature. (verify check/
	(32.2°C)	mixing valves in other equipment is working
		properly)
	Water float valve stuck open or leaking.	Remove the float valve and clean it.
Air-Cooled Models Only	Objects stacked around ice machine, blocking	Remove items blocking airflow.
	airflow to condenser.
	High air temperature around ice machine.	Air temperature must not exceed 110°F
		(43.3°C)
	Inadequate clearance around the ice machine.	Provide adequate clearance.
	The condenser is dirty.	Clean the condenser.

Part No. 80-1214-3 Revised 8/2003 5-1