Manitowoc SD0302A Technician's Handbook page 103

Operational Analysis
Freeze Cycle
Discharge Pressure
_____ ______
1 minute Middle
Freeze Cycle
Suction Pressure
_____ ______
1 minute Middle
Evaporator Outlet
Temperature Comparison
Attach and insulate temperature
probes between evaporator outlet
and 90° elbow
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S MODELS FOUR EXPANSION VALVES
1
If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist
_____
page 112 and eliminate problems and/or components not listed on this table before proceeding.
End
If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist
page 115 and eliminate problems and/or components not listed on this table before proceeding.
_____
Suction pressure is
End
High
Evaporator outlet
temperatures are
within 10°F of
each other
manuals search engine
2 3
Suction pressure Suction pressure
is is
Normal or Low Normal or High
Evaporator outlet
temperatures are
Evaporator outlet
NOT within
temperatures are
10°F of each
other NOT within
or
10°F of each
other
Within 10°F of
each other and
above 32°F
4
Suction pressure is Suction pressure is
High High
Evaporator outlet
Evaporator outlet
temperatures are
temperatures are
within 10°F of
within 10°F of
each other
each other
5