Lennox G60UHV Series Installation Instructions Manual page 43

FLASH CODE
(x. Y)
Pulse
Heartbeat
X+Y
Pulse
Heartbeat
1+2
1+3
2+3
2+4
2+5
2+6
2+7
3+1
4+1
4+2
4+3
4+5
4+6
4+7
4+8
5+1
5+2
5+3
5+4
5+6
I STATUS / ERROR DESCRIPTION
FLASH CODE DESCRIPTIONS
A 114 second flash followed by four seconds of off time.
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
seconds, then repeats.
Power on - Standby.
Normal operation - signaled when heating demand initiated at thermostat.
FLAME CODES
Low flame current -- run mode.
Flame sensed out of sequence -- flame still present.
PRESSURE SWITCH CODES
Low pressure switch failed open.
Low pressure switch failed closed.
High pressure switch failed open.
High pressure switch failed closed.
Low pressure switch opened during ignition trial or heating demand.
LIMIT CODE
Limit switch open.
WATCHGUARD CODES
Watchguard -- Exceeded maximum number of retries.
Watchguard -- Exceeded maximum number of retries or last retry was due to pressure switch opening.
Watchguard -- Exceeded maximum number of retries or last retry was due to flame failure.
Watchguard -- Limit remained open longer than three minutes.
Watchguard -- Flame sensed out of sequence; flame signal gone.
Ignitor circuit fault -- Failed ignitor or triggering circuitry.
Low line voltage.
HARD LOCKOUT CODES
Hard lockout -- Rollout circuit open or previously opened.
Control failed self check, internal error (control will restart if error recovers).
No Earth ground (control will restart if error recovers).
Reversed line voltage polarity (control will restart if the error recovers).
Low secondary (24VAC) voltage.
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