Manitowoc Indigo Series Technician's Handbook page 131

Operational Analysis
Freeze Cycle 
Discharge Pressure
_______ ______ ______
1 minute Middle End
into cycle
Freeze Cycle 
Suction Pressure
_______ ______ _____
1 minute Middle End
Wait 5 minutes into the
freeze cycle.
Compare temperatures of
compressor discharge line
and both harvest valve
inlets.
SINGLE EVAPORATOR, DUAL EXPANSION VALVE
SELF CONTAINED AIR, WATER & REMOTE CONDENSER
1
If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist
page 140 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
page 144 to eliminate problems and/or components not listed on this table before proceeding.
Suction pressure is High
The harvest valve inlet is
Hot
-and-
approaches the
temperature of a Hot
compressor discharge
line.
2
Suction pressure is Low
or Normal
The harvest valve inlet The harvest valve inlet
is Cool enough to hold is Cool enough to hold
hand on
-and-
the compressor
discharge line is Hot. discharge line is Cool
enough to hold hand on.
3
Suction pressure is Suction pressure is
High
The harvest valve inlet
is Cool enough to hold
hand on
-and-
the compressor the compressor
discharge line is Hot.
4
High
hand on
-and-