Safety Limit Feature - Manitowoc Q 800 Installation And Use Manual

Before Calling for Service
Problem
Ice machine produces shallow
or incomplete cubes, or the ice
fill pattern on the evaporator is
incomplete.
Low ice capacity.

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:
5-2
Possible Cause
Ice thickness probe is out of
adjustment.
Water trough level is to high or too low. Set water level.
Water float valve filter screen is dirty.
Water filtration is poor.
Hot incoming water.
Water float valve is not working.
Incorrect incoming water pressure.
Ice machine is not level.
Water float valve filter screen is dirty.
Incoming water supply is shut off.
Water float valve stuck open or
leaking.
Adjust the ice thickness probe.
Remove the water float valve and
clean the filter screen.
Replace the filter.
Connect the ice machine to a cold
water supply
Remove the water float valve and
clean it.
Water pressure must be 20-80 psi
(137.9 - 551.5 kPA).
Level the ice machine.
Remove the water float valve and
clean the filter screen.
Open the water service valve.
Remove the water float valve and
clean it.
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.
Section 5
To Correct