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System Diagnosis Guide
REGRIGERATION SYSTEM DIAGNOSIS GUIDE
System
Suction Suction
Compressor
Condition
Pressure
Line
Discharge
Normal Normal Slightly
Very hot
below room
temperature
Overcharge
Higher than
Very cold
Slightly warm
normal
may frost
to hot
heavily
Undercharge
Lower than
Warm-Hot
normal near room
temperature
Partial
Somewhat Warm-
Very hot
Restriction
lower than
near room
normal vacuum
temperature
Complete
In deep
Room Room
Restriction
vacuum
temperature temperature
(cool) (cool)
No Gas
0 PSIG to 25" Room
Cool to hot
temperature
(cool)
System Diagnosis Guide
Condenser
Capillary
Evaporator
Wattage
Tube
Very hot
Warm Cold Normal
Hot to warm
Cool
Cold
Higher than
normal
Warm Warm
Extremely Lower than
cold near
normal
inlet -Outlet
below room
temperature
Top passes
Room
Extremely Lower than
warm -
temperature
cold near
normal
Lower
(cool) or
inlet -Outlet
passes cool
colder
below room
(near room
temperature
temperature)
backing up
due to liquid
Room Room No
Lower than
temperature temperature refrigeration
normal
( cool) (cool)
Room Room No
Lower than
temperature temperature refrigeration
normal
( cool) (cool)
17
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