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Ignition Control Board Diagnostic Codes (Red LED)
FLASH CODE
(X + Y)
Pulse
A 1/4 second flash followed by four seconds of off time.
Heartbeat
Constant 1/2 second bright and 1/2 second dim cycles.
LED flashes X times at 2Hz, remains off for two seconds, flashes Y times at 2Hz, remains off for four
X + Y
seconds, then repeats.
Pulse
Power on − Standby.
Heartbeat
Normal operation − signaled when heating demand initiated at thermostat.
1 + 2
Low flame current −− run mode.
1 + 3
Flame sensed out of sequence −− flame still present.
2 + 3
Low pressure switch failed open.
2 + 4
Low pressure switch failed closed.
2 + 5
High pressure switch failed open.
2 + 6
High pressure switch failed closed.
2 + 7
Low pressure switch opened during ignition trial or heating demand.
3 + 1
Limit switch open.
4 + 1
Watchguard −− Exceeded maximum number of retries.
4 + 2
Watchguard −− Exceeded maximum number of retries or last retry was due to pressure switch opening.
4 + 3
Watchguard −− Exceeded maximum number of retries or last retry was due to flame failure.
4 + 5
Watchguard −− Limit remained open longer than three minutes.
4 + 6
Watchguard −− Flame sensed out of sequence; flame signal gone.
4 + 7
Ignitor circuit fault −− Failed ignitor or triggering circuitry.
4 + 8
Low line voltage.
5 + 1
Hard lockout −− Rollout circuit open or previously opened.
5 + 2
Control failed self check, internal error (control will restart if error recovers).
5 + 3
No Earth ground (control will restart if error recovers).
5 + 4
Reversed line voltage polarity (control will restart if the error recovers).
5 + 6
Low secondary (24VAC) voltage.
STATUS / ERROR DESCRIPTION
FLASH CODE DESCRIPTIONS
FLAME CODES
PRESSURE SWITCH CODES
LIMIT CODE
WATCHGUARD CODES
HARD LOCKOUT CODES
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