Manitowoc QY0874C User Manual

–168–
REFRIGERANT CHARGE VERIFICATION
QuietQube remote ice machines require the correct
amount of refrigerant (name plate charge) to operate
correctly at all ambient conditions.
An ice machine with an over or under charge of
refrigerant may function properly at higher ambient
temperatures and fails at lower ambient temperatures.
Symptoms of incorrect refrigerant are:
 Works during the day and then malfunctions at
night.
 Safety limit #2 in control board memory.
 Harvest cycle suction pressure is low.
When refrigerant charge is suspected, verify by
recovering the refrigerant, weighing and comparing to
the nameplate amount. Refer to Refrigerant Recovery/
Evacuation” for recovery procedures.
Undercharge Symptoms
 Safety limit #2 in control board memory.
 Harvest cycle suction pressure is low.
 Harvest cycle discharge pressure is low.
 Liquid line entering receiver feels warm to hot in the
freeze cycle.
 Depending on the amount of refrigerant loss, the ice
machine may harvest for one or two cycles when
restarted after an “Automatic Shut-off” (ice machine
pumped down and shut off on low pressure control).

Manitowoc QY0874C Specifications

General

Brand	Manitowoc
Model	QY0874C
Category	Ice Maker
Language	English