Manitowoc SD0302A Technician's Handbook page 104

Operational Analysis
Harvest Valve Temperature
Wait 5 minutes into the freeze
cycle.
Compare temperatures of
compressor discharge line and
harvest valve inlets.
Discharge Line
Temperature
Record freeze cycle discharge
line temperature at the end of the
freeze cycle
_________°F (°C)
Final Analysis
Enter total number of boxes
checked in each column.
Downloaded from www.Manualslib.com
S MODELS FOUR EXPANSION VALVES
1
One harvest valve
inlet is Hot
-and-
approaches the
temperature of a
Hot compressor
discharge line.
Discharge line
temperature 150°F
(65°C)
or higher at the
end of the freeze
cycle
Harvest Valve
Leaking
manuals search engine
2 3
All harvest valve
All harvest valve inlets are Cool
inlets are Cool enough to hold
enough to hold and-
and the compressor
the compressor discharge line is
discharge line is
Cool
enough to hold
Hot.
hand on.
Discharge line
temperature
Discharge line
less than
temperature
150°F (65°C) at
150°F (65°C)
the end of the
or higher at the
freeze cycle
end of the freeze
or
cycle
Compressor
shell is frosted
Low On Charge
-Or- TXV Flooding
TXV Starving
4
All harvest valve
All harvest valve inlets are Cool
inlets are Cool enough to hold
enough to hold and-
and- the compressor
the compressor discharge line is
discharge line is
Cool
enough to hold
Hot.
hand on.
Discharge line
temperature
Discharge line
less than
temperature 150°F
150°F (65°C) at
(65°C) or higher at the end of the
the end of the freeze cycle
freeze cycle
Compressor shell
is frosted
Harvest Pressure
Compressor
Valve Leaking
5
or