Manitowoc Ice manual Before Calling For Service Section, Safety Limit Feature

Before Calling For Service Section 5

Problem	Possible Cause	To Correct
Ice machine produces shallow or	Ice thickness probe is out of adjustment.	Adjust the ice thickness probe.
incomplete cubes, or the ice fill pattern on		(See Section 4)
the evaporator is incomplete.
	Water trough level is too low.	Check the water level probe for damage.
		(See Section 3)
	Water inlet valve filter screen is dirty.	Remove the water inlet valve and clean
		the filter screen. (See Section 4)
	Water filtration is poor.	Replace the filter.
	Hot incoming water.	Connect the ice machine to a cold water
		supply. (See Section 2)
	Water inlet valve is not working.	Replace the water inlet valve.
	Incorrect incoming water pressure.	Water pressure must be 20-80 psi
		(1.4 bar - 5.5 bar)
	Ice machine is not level.	Level the ice machine.
		(See Section 2)
Low ice capacity.	Water inlet valve filter screen is dirty.	Remove the water inlet valve and clean
		the filter screen. (See Section 4)
	Incoming water supply is shut off.	Open the water service valve.
	Water inlet valve stuck open or leaking.	Place toggle switch in OFF position, if
		water continues to enter water trough
		replace the water inlet valve.
	The condenser is dirty.	Clean the condenser. (See Section 4)
	High air temperature entering condenser.	Air temperature must not exceed 120°F
		(39°C)

Safety Limit Feature

In addition to the standard safety controls, such as the high pressure cutout, your Manitowoc ice machine features built-in safety limits which will stop the ice machine if conditions arise which could cause a major component failure.

Before calling for service, re-start the ice machine using the following procedure:

1.Move the ICE/OFF/CLEAN switch to OFF and then back to ICE.

A.If the safety limit feature has stopped the ice machine, it will restart after a short delay. Proceed to step 2.

B.If the ice machine does not restart, see “Ice machine does not operate” on the previous page.

2.Allow the ice machine to run to determine if the condition is recurring.

A.If the ice machine stops again, the condition has recurred. Call for service.

B.If the ice machine continues to run, the condition has corrected itself. Allow the ice machine to continue running.

5-2 Part Number 80-1620-3