Install Instructions

Flame not established
1. If the ame is not established or proven during the initial sequence, the gas is shut off (if energized) and the board will enter a
retry mode. There will be four more successive attempts allowed each having a 15 second inducer purge between attempts.
2. After the initial attempt and four successive attempts, if ame is still not established and proven there will be a 1 hour lock
out before the system will reset automatically. To reset the control before the 1 hour lockout has elapsed, cycle off and on the
24 VAC power to the board. If the problem is not a false ame, the board can also be reset by cycling the heat call off and on.
However if the problem is a false ame (ame detected when the gas valve is de-energized and there is no ame), cycling the
heat call will not reset the board.
Flame out
1. Flame out is considered when ame is lost during heating.
2. When a W signal is present and ame is lost and no longer sensed, the gas valves will disengage until the next trial for ignition.
The circulating blower and inducer will remain running.
3. If all retry attempts fail and the ame is still not proven, there will be a 1 hour lock out before the system resets automatically.
False ame
1. Flame out of sequence represents a scenario when ame is sensed while gas valve is de-energized.
2. Inducer and Blower motors will be engaged (if not already running) and keep running for as long as the fault condition is
present.
Flame Sense Troubleshooting Tips
LED Fault Codes
LED
Status Description Trouble Shooting Tips
ON Normal operation N/A
OFF Control board failure
Check for proper input voltage and check the fuse; if not resolved replace control.
1 Ignition failure (soft
lockout)
Clean or replace the ame sensor, check the igniter for proper operation & input voltage, check
the transformer’s common is grounded to earth ground.
2 Pressure switch stuck
closed
Check for contaminated or defective pressure switch.
3 Pressure switch stuck
open
Check for obstructed pressure switch tubing or defective pressure switch. Check for oxidation on
terminals, broken wires, or defective inducer motor .
4 Limit switch fault Checked for blocked airow, blocked duct work, and dirty lter. Check or replace high limit switch
if defective.
5 Flame out of sequence Check for intermittent or defective gas valve and check for dirty or defective ame sensor.
6 Roll out switch fault Check for a cracked heat exchanger, defective rollout switch , broken wires on the roll out switch,
or replace roll out switch if required.
7 Weak ame Weak ame is caused by carbon build up on the ame sensor, poor grounds, or improper
placement of ame sensor . Clean or replace ame sensor, reassure grounds, ensure ame
sensor is fully enveloped in the ame.
8 Miswired gas valve Check for shorted or mis-wired gas valve, check harness wires for any shorts or breaks, and
check the pressure switch for proper operation.
9 Unused N/A
10 Hot and neutral
reversed
Check for proper polarity of incoming voltage on the primary and secondary of the transformer.
11 Brownout A brownout fault indicates a low voltage condition. Check the voltage on the primary and the
secondary of the transformer and ensure there is no excessive load on the transformer.