132 Part Number STH025 11/16
SINGLE EVAPORATOR, DUAL EXPANSION VALVE
SELF CONTAINED AIR, WATER & REMOTE CONDENSER
Operational Analysis 1 2 3 4
Freeze Cycle
Discharge Pressure
________ _______ ______
1 minute Middle End
into cycle
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.
Freeze Cycle
Suction Pressure
________ _______ ______
1 minute Middle End
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
Suction pressure is
Low or Normal
Suction pressure is
High
Suction pressure is
High
Wait 5 minutes into the freeze
cycle.
Compare temperatures of
compressor discharge line and
both harvest valve inlets.
The harvest valve inlet
is Hot
-and-
approaches the
temperature of a Hot
compressor discharge
line.
The harvest valve inlet
is Cool enough to hold
hand on
-and-
the compressor
discharge line is Hot.
The harvest valve inlet
is Cool enough to hold
hand on
-and-
the compressor
discharge line is Cool
enough to hold hand
on.
The harvest valve inlet
is Cool enough to hold
hand on
-and-
the compressor
discharge line is Hot.