Page 1: ...utdoor Fan Defrost Relay 7 Remove outdoor fan defrost relay Install replacement outdoor fan defrost relay 1 Connect one end of long wire provided to HLD terminal on the defrost board Disconnect defros...
Page 2: ...HIGH PRESSURE SWITCH LOSS OF CHARGE _ SWITCH DEFROST BOARD COMPRESSOR CONTACTOR RST 0 HLD 24V _ OUT _ tOM9 TYPICAL WIRING DEFROST THERMOSTAT OUTDOOR FAN AND DEFROST RELAY EXISTING TRANSFORMER COMMON...
Page 3: ...ltows the unit to continue timing upon resumption of thermostat demand tn most units terminal HLD is connected directly to thermostat demand 4 OUT Terminal Terminal OUT controls unit defrost when conn...
Page 4: ...necessary I Repeat troubleshooting procedure Does un_ go into defrost t within appropriate time I Repeat troubleshooting Yes No _ procedure i Unit is operating properly Check voltage across OUT Turn o...
