Integrated Control Diagnostic Codes

FLASH CODE

STATUS / ERROR DESCRIPTION

(X + Y)

 

 

FLASH CODE DESCRIPTIONS

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.

 

 

X + Y

LED flashes X times at 2Hz, remains off for two seconds, flashes Y times at 2Hz, remains off for four

seconds, then repeats.

 

 

 

Pulse

Power on − Standby.

 

 

Heartbeat

Normal operation − signaled when heating demand initiated at thermostat.

 

 

 

FLAME CODES

1 + 2

Low flame current −− run mode.

 

 

1 + 3

Flame sensed out of sequence −− flame still present.

 

 

 

PRESSURE SWITCH CODES

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.

 

 

 

LIMIT CODE

3 + 1

Limit switch open.

 

 

 

WATCHGUARD CODES

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.

 

 

 

HARD LOCKOUT CODES

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.

Error Code Storage

The ignition control stores the last ten error codes in memory. The codes are retained in case of power loss.

Error Code Review

1 − Short R (2) to (1). Within 1/2 second, the STATUS LED will stay lit continuously to indicate that the short was sensed.

2 − Continue to hold the short between R (2) to (1). After 5 seconds, STATUS LED will go from being continuously

lit to off. This indicates that error code review is pend- ing.

3 − Remove R (2) to (1) short within ten seconds of STA- TUS LED turning off. This activates error code review.

4 − Last ten error codes will be flashed on the STATUS

LED.

5 − After final error code is indicated, STATUS LED will

flash to indicate normal operation.

Clearing Error Codes

1 − Short R (2) to (1). Within 1/2 second, the STATUS LED will stay lit continuously to indicate that the short was sensed.

2 − Continue to hold the short between R (2) to (1). After 5

seconds, STATUS LED will go from being continuously

lit to off.

3 − Continue to hold the short between R (2) to (1) beyond ten seconds after STATUS LED has turned off. STA- TUS LED will turn on, indicating that error codes have been cleared.

4 − Remove R (2) to (1) short. STATUS LED will flash to in-

dicate normal operation.

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Lennox International Inc Elite Series Gas Furnace Upflow/Horizontal Air Discharge Integrated Control Diagnostic Codes, Led
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Elite Series Gas Furnace Upflow/Horizontal Air Discharge, EL280UH specifications

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