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Before Calling for Service Section 5
5-2
Part Number 000001130 12/08
Safety Limit Feature
In addition to the standard safety controls, your
Manitowoc ice machine features built-in safety limits that
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 ON/OFF/ WASH switch to OFF and then
back to ON.
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 reoccurring.
A. If the ice machine stops again, the condition has
reoccurred. 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
Ice thickness probe is out of adjustment. Adjust the ice thickness probe.
fill pattern on the evaporator is
incomplete.
Water trough level is to high or too low. Check the water level.
Water float valve filter screen is dirty. Remove and clean the filter screen.
Water filtration is poor. Replace the filter.
Hot incoming water. Connect the ice machine to a cold water
supply.
Water float valve is not working. Remove the water float valve and clean it.
Incorrect incoming water pressure. Water pressure must be 20-80 psi (137.9 -
551.5 kPA).
Ice machine is not level. Level the ice machine.
Low ice capacity. Water float valve filter screen is dirty. Remove and clean the filter screen.
Incoming water supply is shut off. Open the water service valve.
Water float valve stuck open or leaking. Remove the water float valve and clean it.
The condenser is dirty. Clean the condenser.
High air temperature around ice machine
(air-cooled models).
Air temperature must not exceed 110°F
(43.3°C).
Inadequate clearance around the ice
machine.
Provide adequate clearance.
Objects stacked around ice machine,
blocking airflow to condenser
(air-cooled models).
Remove items blocking airflow.