Fedders F80A - Manual (Page 23)

22
WARM AIR FURNACE
TROUBLESHOOTING
SEQUENCE OF OPERATION: WHITE RODGERS INTEGRATED FURNACE CONTROL WITH WHITE RODGERS 36G22 GAS VALVE
APPLY POWER TO APPLIANCE
THERMOSTAT CALLS FOR HEAT
AIR PROVING SWITCH PROVED OPEN?
COMBUSTION AIR BLOWER ON
AIR PROVING SWITCH PROVED
CLOSED
PREPURGE
HOT SURFACE IGNITER ON FOR
WARM-UP TIME
MAIN VALVE OPENS
HOT SURFACE IGNITER OFF
MAIN BURNER LIGHTS AND IS
SENSED DURING TRIAL FOR IGNITION?
CIRCULATING AIR FAN ON AFTER DELAY
FLAME SENSE LOST? MAIN VALVE CLOSES
THERMOSTAT CALL FOR HEAT ENDS
MAIN VALVE CLOSES
COMBUSTION AIR BLOWER OFF
AFTER POST PURGE
CIRCULATING AIR FAN OFF AFTER DELAY
WAIT FOR NEXT CALL FOR HEAT
HOT SURFACE IGNITER OFF
COMBUSTION AIR BLOWER OFF
AFTER POST PURGE
WAIT FOR AIR PROVING SWITCH TO OPEN
FIVE MINUTE WAIT PERIOD
COMBUSTION AIR BLOWER OFF
BETWEEN TRIAL PURGE
MAIN VALVE CLOSES
TRIALS FOR IGNITION LESS THAN FOUR
DURNG THIS IGNITION SEQUENCE?
FLAME SENSE LOST MORE THAN FIVE
TIMES IN THIS CALL FOR HEAT?
NO
NO
NO
NO
NO
YES
YES
YES YES
YES
YES
NO
YES