Lennox G32V Series Service Literature page 12

FLAME SENSE
MAKE SURE TO ID LED'S CORRECTLY: REFER TO INSTALLATION INSTRUCTIONS FOR CONTROL BOARD LAYOUT.
LED #1
SIMULTANEOUS
SLOW FLASH
SIMULTANEOUS FAST SIMULTANEOUS FAST
FLASH
SLOW FLASH
OFF
ALTERNATING SLOW ALTERNATING SLOW
FLASH
SLOW FLASH
ON
ON
ON
OFF
FAST FLASH
SLOW FLASH
ALTERNATING FAST ALTERNATING FAST
FLASH
NOTE − Slow flash equals 1 Hz (one flash per second). Fast flash equals 3 Hz (three flashes per second). Drop out flame sense current < 0.20 microAmps
TABLE 9
SureLight BOARD J156 TERMINAL
DESIGNATIONS
PIN #
1
2
3
4 Combustion Air Blower Line Voltage
5
Combustion Air Blower Neutral
6
SURELIGHT CONTROL TERMINAL DESIGNATIONS
ACB COOL
ACB HEAT
PARK
ACB LOW
ACC
TX
HOT
HTG ACC
NEUTRALS
24VAC HOT
24VAC RTN
LED #2
SIMULTANEOUS
SLOW FLASH
FLASH
Primary or Secondary limit open. Units with board 63K89 or 24L85: Limit must close within 5
trials for ignition or board goes into one hour limit Watchguard. Units with board 56L83 or
ON
97L48: Limit must close within 3 minutes or board goes into one hour limit Watchguard.
Pressure switch open or has opened 5 times during a single call for heat; OR: Blocked inlet/
exhaust vent; OR: Condensate line blocked; OR: Pressure switch closed prior to activation of
SLOW FLASH
FLASH
OFF
SLOW FLASH
ON
OFF
ON
SLOW FLASH
FAST FLASH
Improper main ground or line voltage below 75 volts; OR: Broken ignitor; OR: Open ignitor
FLASH
FUNCTION
Ignitor
Not Used
Ignitor Neutral
Not Used
TABLE 7
NOT USED
NOT USED
NOT USED
NOT USED
ACCESSORY TERMINAL (LINE VOLT)
120VAC TRANSFORMER
120VAC HOT INPUT
HEAT ONLY ACCESSORY (LINE VOLT)
120VAC NEUTRALS
24VAC HOT FROM TRANSFORMER
24VAC RETURN FROM TRANSFORMER
FLAME SENSE TERMINAL
TABLE 8
DIAGNOSTIC CODES
DESCRIPTION
Power − Normal operation
Also signaled during cooling and continues fan.
Normal operation − signaled when heating demand initiated at thermostat.
combustion air blower.
Watchguard − burners fail to ignite.
Flame sensed without gas valve energized.
Rollout switch open. OR: 9 pin connector improperly attached.
Circuit board failure or control wired incorrectly.
Main power polarity reversed. Switch line and neutral.
Low flame signal. Measures below .61 microAmps. Replace flame sense rod.
SureLight BOARD J58 TERMINAL
PIN #
1
2
3
4
5
6
7
8
9
Page 12
circuit.
TABLE 10
DESIGNATIONS
FUNCTION
Primary Limit In
Gas Valve Common
Roll Out Switch Out
Gas Valve 24V
Pressure Switch In
Pressure Switch and Primary Limit Out
Not Used
Roll Out Switch In
Ground