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Part Number 000015433_02 11/19 79
Replace Relay
Line Voltage To
Compressor
Contactor Coil?
YES
Low Pressure
Control Closed?
Line Voltage At
Liquid Line Solenoid
Valve?
NO
NO
YES
Verify:
Refrigerant Pressure is Higher Than LPCO Cut-
in Both Shut-off Valves are Open Repair/
Replace Liquid Line Solenoid Locate and Repair
Refrigerant Leak
Replace LPCO Switch
YES
High Pressure
Control Closed?
Resets?
Replace HPCO
Clean Condenser, Check
Fan Motor Check Fan
Cycle Control
Refrigerant Pressure
Above Cut-out?
Resets
&
Trips
NO NO
YES
NO
NO
Clean Condenser,
Check Fan Motor,
Check Fan Cycle Control &
Refrigeration System
YES
YES
Repair Wiring
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