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8) Low suction pressure and low to normal
head pressure
High superheat and high subcooling
9) Low suction pressure and low head
pressure
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
8) Liquid line restricted after
receiver, solenoid valve
restricted
9) Suction line restricted
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
10. 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 the condenser fan
