Page 44
SURELIGHT CONTROL
HEATING SEQUENCE OF OPERATION
NORMAL HEATING MODE ABNORMAL HEATING MODE
CONTROL SELF−CHECK OKAY?
BURNER OFF?
(CONTINUOUS FLAME CHECK)
NORMAL OPERATION:
LED #1 −− SLOW FLASH
LED #2 −− SLOW FLASH
YES
YES
YES
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER DELAY OFF.
LED #1 ON
LED #2 ON
(RESET CONTROL BY TURNING MAIN POWER OFF.)
POLARITY REVERSED.
LED #1 −− FAST FLASH
LED #2 −− SLOW FLASH
POWER ON
COMBUSTION AIR INDUCER ON FOR 1 SECOND.
(Iinition control 9748 only)
IS POLARITY REVERSED?
ROLLOUT SWITCH CLOSED?
THERMOSTAT CALLS FOR HEAT:
LED #1 −− FAST FLASH
LED #2 −− FAST FLASH
IS COMBUSTION AIR
PROVE SWITCH OPEN?
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH DELAY.
LED #1 −− ON. LED #2 −− SLOW FLASH.
SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES.
GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
INDOOR BLOWER ON HEATING SPEED.
LED #1 −− SLOW FLASH
LED #2 −− OFF
GAS VALVE OFF.
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH DELAY.
LED #1 OFF
LED #2 SLOW FLASH
(Sequence holds until PROVE switch
closes or thermostat resets control.)
NO
NO
YES
NO
IS THERE
PROPER GROUND?
IS VOLTAGE
ABOVE 75 VOLTS?
LED#1 AND LED#2 ALTERNATING FAST
FLASH. SIGNAL HOLDS UNTIL VOLTAGE
RISES ABOVE 75 VOLTS.
NO
YES
NO
NO
NO
IS COMBUSTION AIR INDUCER ENERGIZED?
(ACCESSORY TERMINAL IS ENERGIZED WITH C.A.I.)
HAS COMBUSTION AIR PROVE SWITCH
CLOSED IN 2.5 MINUTES?
YES
YES
PROVE SWITCH IS IN WATCHGUARD MODE.
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF WITH DELAY.
LED #1 −− OFF. LED #2 −− SLOW FLASH.
IS 5-MINUTE RESET PERIOD COMPLETE?
NO
15-SECOND COMBUSTION AIR INDUCER PREPURGE
INITIATED BY CLOSED PROVE SWITCH.
YES
YES
CONTINUED NEXT PAGE
YES
GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
INDOOR BLOWER ON.
LED #1 ALTERNATING FAST FLASH
LED#2 ALTERNATING FAST FLASH
CHECK FOR BROKEN IGNITOR OR
OPEN IGNITOR CIRCUIT
LED#1 AND LED#2
ALTERNATING FAST
FLASH. SIGNAL
HOLDS UNTIL UNIT IS
PROPERLY GROUND.
TABLE 24
FLAME SENSE SIGNAL
97L48
Ignition Control
69M15
Normal
Low Drop Out
0.31 0.25 − 0.30 0.24
0.61 0.21 − 0.60 0.20
Control board 69M15 RED LED #1 = DS1 & GREEN LED #2 = DS2
Control board 97L48 GREEN LED #1 = DIAG1 & GREEN LED #2 = DIAG2
To Next Page
Loading...
Need help?
General