Troubleshooting: Heating Sequence Of Operation (Continued) - Haier GE APPLIANCES NF80D045S3A Service Manual

Troubleshooting: Heating Sequence of Operation (Continued)

N O R M A L H
15 SECOND COMBUSTION AIR INDUCER PREPURGE
INITIATED BY CLOSED PRESSURE SWITCH.
YES
IGNITOR WARM UP -- 20 SECONDS.
YES
4 SECOND TRIAL FOR IGNITION.
GAS VALVE OPENS. IGNITOR ENERGIZED FOR
FIRST 3 SECONDS OF THE TRIAL.
YES
FLAME STABILIZATION PERIOD.
4 SECONDS
FLAME RECTIFICATION CURRENT
CHECK. CAN FLAME BE PROVEN WITHIN
4 SECONDS AFTER GAS VALVE OPENS?
(0.5 microamps)
YES
FLAME PRESENT?
YES
FLAME SIGNAL 1.5 MICROAMPS OR GREATER?
YES
INDOOR BLOWER ON
AFTER 30-SECOND DELAY
YES
PRIMARY LIMIT SWITCH CLOSED?
YES
ROLLOUT SWITCH CLOSED?
YES
COMBUSTION AIR PRESSURE
SWITCH CLOSED?
YES
THERMOSTAT DEMAND SATISFIED.
YES
LED SLOW FLASH.
YES
COMB. AIR INDUCER CONTINUES 5 SECOND
POST PURGE AFTER T'STAT DEMAND IS SATISFIED.
INDOOR AIR BLOWER COMPLETES SELECTED "OFF"
DELAY BEFORE SHUTTING OFF.
31-5000736 Rev. 0
HEATING SEQUENCE CONTINUED
E A T N I G M O D E A B N O R M
NO
IS VOLTAGE ABOVE 70 VOLTS?
YES
GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
INDOOR BLOWER OFF.
HAS CONTROL FAILED TO SENSE FLAME FOR
NO
FIVE CONSECUTIVE TRIES DURING A SINGLE
HEAT DEMAND?
LED SIGNAL SOFT LOCKOUT FAILURE CODE
SOFT LOCKOUT MODE. GAS VALVE OFF.
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH DELAY
IS 60 MINUTE RESET PERIOD COMPLETE?
NO
HAS CONTROL RESET IGNITION
SEQUENCE FOUR TIMES?
NO
LED FLASHES CODE 4 - LOW
FLAME SIGNAL.
(Does not affect operation of control)
LED FLASHES CODE 7 - PRIMARY LIMIT OPEN
GAS VALVE DE-ENERGIZED.
COMBUSTION AIR INDUCER DE-ENERGIZED.
NO
INDOOR BLOWER ON UNTIL SWITCH CLOSES.
LIMIT SWITCH CLOSED?
YES
HAS PRIMARY LIMIT RESET
TIME EXCEEDED 3 MINUTES?
NO
LED FLASHES CODE 8 - ROLLOUT SWITCH OPEN.
GAS VALVE POWER OFF. COMBUSTION AIR INDUCER POWER
ON. INDOOR BLOWER ON SEQUENCE HOLDS UNTIL ROLLOUT
SWITCH IS RESET AND MAIN POWER IS INTERRUPTED OR
THERMOSTAT IS CYCLED OFF/ON FOR 1 SEC. MINIMUM.
NO
HAS PRESSURE SWITCH OPENED 5
TIMES IN SAME HEAT DEMAND
NO
GAS VALVE DE-ENERGIZED.
COMBUSTION AIR INDUCER ON.
INDOOR BLOWER OFF WITH DELAY
HAS CAI SWITCH CLOSED IN 2.5 MINUTES?
NO
5 MINUTE PRESSURE SWITCH
SOFT LOCKOUT MODE.
Page 27
A L H E A T N I G M O D E
LED FLASHES CODE 13 -
LOW LINE VOLTAGE.
NO
ONCE VOLTAGE IS ABOVE
75 VOLTS, HEATING
SEQUENCE RESTARTS.
LED FLASHES CODE
7 - PRIMARY LIMIT
OPEN. GAS VALVE,
COMB. AIR INDUCER
ER OFF. LEDs SIGNAL
LIMIT SWITCH OPEN
UNTIL MAIN
INTERRUPTED OR
T'STAT IS CYCLED
OFF/ON FOR 1 SEC.
MINIMUM. 60-MINUTE
SOFT LOCKOUT
PERIOD STARTS AT
YES
TIME LIMIT CLOSES.
IS 60-MIN. PERIOD
NO
YES
1 HR PRESSURE
YES
NO
YES
YES
NO
YES
POWER IS
COMPLETE?
LED FLASHES
CODE 10
SWITCH
SOFT LOCKOUT
MODE