Manitowoc QM20

132 Part Number 80-01111-9 7/10
Q130/Q170/Q210/Q270 Ice Machines Only
(continued)
4
Stops on
safety limit:
1
If discharge pressure is High or Low, refer to freeze cycle high or
low discharge pressure problem checklist to eliminate problems
and/or components not listed on this table before proceeding.
If suction pressure is High or Low refer to freeze cycle high or low
suction pressure problem checklist to eliminate problems and/or
components not listed on this table before proceeding.
Suction
pressure is
High
3
Stops on
safety limit:
1 or 2
Suction
pressure is
High
2
Stops on
safety limit:
1
Suction
pressure is
Low
1
Stops on
safety limit:
1 or 2
Suction
pressure is
High
Operational Analysis
Safety limits
Refer to “Analyzing Safety
Limits” to eliminate all non-
refrigeration problems.
Freeze cycle
Discharge Pressure
_______ _______
_______
1 minute Middle End
Freeze cycle
Suction Pressure
_______ _______
_______
1 minute Middle End