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Before Calling For Service Section 5
5-2 Part Number 80-1620-3
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.
Problem Possible Cause To Correct
Ice machine produces shallow or
incomplete cubes, or the ice fill pattern on
the evaporator is incomplete.
Ice thickness probe is out of adjustment. Adjust the ice thickness probe.
(See Section 4)
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)