Troubleshooting: Heating Sequence Of Operation - Haier GE APPLIANCES NF96US Service Manual

Troubleshooting: Heating Sequence of Operation

NORMAL HEATING MODE
CONTROL SELF CHECK OKAY?
IS POLARITY CORRECT?
IS THERE A PROPER GROUND?
ROLLOUT SWITCH CLOSED?
NO
NORMAL OPERATION:
THERMOSTAT CALLS FOR HEAT:
PRIMARY LIMIT SWITCH CLOSED?
PRESSURE SWITCH OPEN?
IS COMBUSTION AIR INDUCER
HAS COMBUSTION AIR PRESSURE
SWITCH CLOSED IN 2.5 MINUTES?
CONTINUED NEXT PAGE
POWER ON
YES
YES
YES
IS VOLTAGE
ABOVE 70 VOLTS?
YES
YES
BURNER OFF?
YES
LED SLOW FLASH
YES
LED SLOW FLASH
YES
YES
IS COMBUSTION AIR
YES
ENERGIZED?
YES
YES
ABNORMAL HEATING MODE
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
NO
(RESET CONTROL BY TURNING MAIN POWER OFF.)
NO
NO
LED FLASHES CODE 13 - LOW LINE VOLTAGE.
NO
CONTROL WILL NOT RESPOND TO A CALL FOR
HEATING UNTIL VOLTAGE RISES ABOVE 75 VOLTS.
LED FLASHES CODE 8 - ROLLOUT SWITCH
NO
OPEN. GAS VALVE OFF. COMBUSTION
AIR INDUCER ON. INDOOR BLOWER ON.
SEQUENCE HOLDS UNTIL ROLLOUT SWITCH
CLOSES AND POWER IS RESET OR T'STAT IS
INTERRUPTED FOR MINIMUM OF 1 SECOND.
LED FLASHES CODE 12 - FLAME SENSED
NO
WITHOUT GAS VALVE ENERGIZED. GAS VALVE OFF.
COMBUSTION AIR INDUCER ON. INDOOR BLOWER
NO
NO
LED FLASHES CODE 9 - PRESSURE SWITCH
FAILED TO CLOSE OR OPENED DURING HEAT
NO
DEMAND. PRESSURE SWITCH IS IN WATCHGUARD
MODE. GAS VALVE OFF. COMBUSTION AIR
INDUCER OFF. INDOOR BLOWER OFF WITH
DELAY. IS 5-MINUTE RESET PERIOD COMPLETE?
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INDOOR BLOWER DELAY OFF.
LED SLOW FLASH
LED FLASHES CODE 1 -
POLARITY REVERSED.
LED FLASHES CODE 2 -
IMPROPER GROUND.
ON HEATING SPEED.
LED FLASHES CODE 7 - PRIMARY
LIMIT OPEN. COMBUSTION AIR
INDUCER OFF.I NDOOR BLOWER ON
LED FLASHES CODE 11 - PRESSURE
SWITCH CLOSED. GAS VALVE OFF
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH DELAY.
(Sequence holds until pressure switch
opens or thermostat resets control.)
YES
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