Manitowoc Ice QM20 - Manual (Page 26)

Before Calling for Service Section 5
5-2
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.
See page 4-5.
Water inlet valve filter screen is dirty. Remove the water inlet valve and
clean the filter screen. See page 4-
6.
Water filtration is poor. Replace the filter.
Hot incoming water. Connect the ice machine to a cold
water supply. See page 2-5.
Ice thickness adjustment dial is not set
properly. Adjust the ice thickness adjustment
dial. See page 3-2.
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.
See page 2-2.
Low ice capacity. Water inlet valve filter screen is dirty. Remove the water inlet valve and
clean the filter screen. See page 4-
6.
Incoming water supply is shut off. Open the water service valve.
The air filter is dirty. Clean the air filter. See page 4-1.
The condenser is dirty. Clean the condenser. See page 4-1.
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. See page 3-2.