Refrigeration System Diagnosis Guide - U-Line UMRI121-SS02A User Manual & Service Manual

USER GUIDE

REFRIGERATION SYSTEM DIAGNOSIS GUIDE

System Suction
Condition Pressure
Normal Normal
Overcharge Higher than
normal
Undercharge Lower than
normal
Partial Somewhat
Restriction lower than
normal -
in vacuum
Complete In deep
Restriction vacuum
No Gas 0 PSIG to 25"
Troubleshooting - Extended 1
Suction Compressor
Line Discharge
Slightly below Very hot
room
temperature
Very cold - Slightly warm
may frost to hot
heavily
Warm - Hot
near room
temperature
Warm - Very hot
near room
temperature
Room Room
temperature temperature
(cool) (cool)
Room Cool to hot
temperature
(cool)
Condenser Capillary
Tube
Very hot Warm
Hot to warm Cool
Warm Warm
Top passes Room
warm lower temperature
passes cool (cool) or colder
(near room
temperature due
to liquid
Room Room
temperature temperature
(cool) (cool)
Room Room
temperature temperature
(cool) (cool)
40
Evaporator Wattage
Cold Normal
Cold Higher than
normal
Extremely cold Lower than
near inlet - normal
outlet below
room
temperature
Extremely cold Lower than
near inlet - normal
outlet below
room
temperature
backing up
No refrigeration Lower than
normal
No refrigeration Lower than
normal
Troubleshooting - Extended 3