Manitowoc Ice UNDERCOUNTER QM30 - Manual (Page 22)

Before Calling for Service Section 5
5-2 Part Number 000001772 07/08
Problem Possible Cause To Correct
Ice machine produces shallow or
incomplete cubes, or the ice fill
pattern on the evaporator is
incomplete Water level is low Be sure the overflow tube is fully seated to
prevent water leakage
Water inlet valve filter screen is dirty Remove the water inlet valve and clean
the filter screen
Water filtration is poor Replace the filter
Hot incoming water Connect the ice machine to a cold water
supply
Ice thickness adjustment dial is not set
properly Adjust the ice thickness adjustment dial
Incorrect incoming water pressure Water pressure must be 240-620 kPA
(34.8 - 89.9 psi)
Ice machine is not level Level the ice machine
Low ice capacity Water inlet valve filter screen is dirty Remove the water inlet valve and clean
the filter screen
Incoming water supply is shut off Open the water service valve
The air filter is dirty Clean the air filter
The condenser is dirty Clean the condenser
Inadequate airflow at the front of the ice
machine Remove items blocking airflow at the front
of the ice machine
Ice thickness adjustment dial is not set
properly Adjust the ice thickness adjustment dial