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Normal to high superheat and low subcooling
10) Low suction pressure and low head pressure
Low superheat and low subcooling
11) Low suction pressure and low to normal head
pressure
High superheat and normal to high subcooling
12) Low suction pressure and normal head pressure
High superheat and normal subcooling
13) Low suction pressure and high head pressure
High superheat and high subcooling
14) Low suction pressure and high head pressure
High superheat and high subcooling
15) low to normal suction pressure and high head
pressure
Normal to high superheat and high subcooling
10) Air
restricted at evaporator,
evaporator iced
11) Evaporator restricted
12) Expansion valve restricted
13) Both evaporator and condenser
restricted; liquid and suction lines
connected wrong
14)
Liquid line restricted before
receiver
15) Condenser restricted
11. Condensing Unit Troubleshooting
Unit not running
1) Incorrect power supply
2) Incorrect or loose wirings
3) Failed
components
4) Low pressure switch shutting down the
system
5) high pressure switch shutting down the
system
1) Check for proper voltage
2) Check all wirings and connections
3) Check start relay, start capacitor,
overload protector, compressor.
4) Check for system restriction or low
refrigerant
5) Check for condenser fan
