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t.
Low suction pressure and low to normal head pressure
High superheat and normal to high subcooling
u. Low suction pressure and normal head pressure
High superheat and normal subcooling
v. Low suction pressure and high head pressure
High superheat and high subcooling
w. Low suction pressure and high head pressure
High superheat and high subcooling
x. low to normal suction pressure and high head pressure
Normal to high superheat and high subcooling
t. Evaporator
restricted
u. Expansion valve restricted
v. Both evaporator and condenser
restricted; liquid and suction
lines connected wrong
w. Liquid line restricted before
receiver
x. Condenser
restricted
11. Condensing Unit Troubleshooting
Unit not running
1) Incorrect power supply
2) Incorrect or loose wirings
3) Failed
components
4) Low pressure control shutting down the
system
5) High pressure control 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 the condenser water flow
