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Refrigeration Systems; Refrigeration System Diagnosis Guide - U-Line U-1075WCS-00 Service Manual

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Refrigeration System Diagnosis Guide

System
Suction
Condition
Pressure
Normal
Normal
Higher than
Overcharge
normal
Lower than
Undercharge
normal
Somewhat lower
Partial
than normal -
Restriction
in vacuum
Complete
In deep vacuum
Restriction
No Gas
0 PSIG to 25"
Suction
Compressor
Line
Discharge
Slightly below
room
Very hot
temperature
Very cold -
Slightly warm to
may frost heavily
hot
Warm -
near room
Hot
temperature
Warm -
near room
Very hot
temperature
Room
Room
temperature
temperature
(cool)
(cool)
Room
temperature
Cool to hot
(cool)
U-Line Service
Condenser
Capillary
Tube
Very hot
Warm
Hot to warm
Cool
Warm
Warm
Top passes warm -
lower passes cool
Room
(near room
temperature
temperature due
(cool) or colder
to liquid
Room
Room
temperature
temperature
(cool)
(cool)
Room
Room
temperature
temperature
(cool)
(cool)
Troubleshooting
Evaporator
Wattage
Cold
Normal
Higher than
Cold
normal
Extremely cold
near inlet - outlet
Lower than
below room
normal
temperature
Extremely cold
near inlet -outlet
Lower than
below room
normal
temperature
backing up
Lower than
No refrigeration
normal
Lower than
No refrigeration
normal
14

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