Lennox G32V Series Service Literature page 57

NOTE:
NORMAL HEATING MODE
CONTROL SELF−CHECK OKAY?
COMBUSTION AIR INDUCER ON FOR 1 SECOND.
ROLLOUT SWITCH CLOSED?
(CONTINUOUS FLAME CHECK)
LED #1 −− SIMULTANEOUS SLOW FLASH
LED #2 −− SIMULTANEOUS SLOW FLASH
THERMOSTAT CALLS FOR HEAT:
PRIMARY LIMIT SWITCH CLOSED?
PROVE SWITCH CONTACTS OPEN?
ENERGIZE COMBUSTION AIR INDUCER.
ENERGIZE HTG ACC. TERM.
IS UNIT PROPERLY GROUNDED?
IS LINE VOLTAGE ABOVE 75 VOLTS?
TWO−STAGE MODE
CALL FOR 1ST STAGE HEAT
COMBUSTION AIR INDUCER
ON LOW SPEED (t 2.5 MINUTES)
LOW−HEAT PROVE
SWITCH CLOSED?
CONTINUED ON NEXT PAGE
HEATING SEQUENCE OF OPERATION
LED REFERS TO SURELIGHT CONTROL . LED−DS REFERS TO VSP CONTROL.
POWER ON
POLARITY OKAY?
YES
YES
BURNER OFF?
YES
NORMAL OPERATION:
LED #1 −− FAST FLASH
LED #2 −− FAST FLASH
YES
YES
(HIGH AND LOW HEAT)
YES
YES
YES
W2 TIMED MODE
SINGLE STAGE T'STAT
COMBUSTION AIR INDUCER
ON HIGH SPEED (t 2.5 MINUTES)
NO
HIGH−HEAT PROVE
SWITCH CLOSED?
YES YES
PREPURGE
15 SECONDS
ABNORMAL HEATING MODE
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
NO
(RESET CONTROL BY TURNING MAIN POWER OFF.)
NO
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.
NO
GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
NO
COMBUSTION AIR INDUCER OFF.
NO
INDOOR BLOWER ON.
LED #1 −− SLOW FLASH
NO
NO
SINGLE−STAGE MODE
HIGH HEAT ONLY
NO
Page 57
INDOOR BLOWER DELAY OFF.
LED #1 ON
LED #2 ON
POLARITY REVERSED.
LED #1 −− FAST FLASH
LED #2 −− SLOW FLASH
INDOOR BLOWER OFF DELAY.
LED #1 −− ON
LED #2 −− SLOW FLASH
INDOOR BLOWER ON.
LED #1 −− SLOW FLASH
LED #2 −− OFF
LED #2 −− ON
GAS VALVE OFF.
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF DELAY.
LED #1 OFF
LED #2 SLOW FLASH
(Sequence holds until PROVE switch
closes or thermostat resets control.)
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF.
LED #1 −− ALTERNATING FAST FLASHES
LED #2 −− ALTERNATING FAST FLASHES
PROVE SWITCH WATCHGUARD
(5 MINUTES)
COMBUSTION AIR INDUCER OFF.
INDOOR BLOWER OFF.
LED #1 OFF
LED #2 SLOW FLASH
WATCHGUARD 60-MINUTE DELAY
(SIGNAL LIMIT OR IGNITION FAILURE)
GAS VALVE OFF. COMBUSTION AIR
AND INDOOR BLOWER OFF.
LED #1 AND LED #2
ALTERNATING SLOW FLASHES