Lennox EL296UHE Series Unit Information

Page 13
TABLE 4 Continued
Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover
E270 Soft lockout - Exceeded maximum number of
retries. No ame current sensed.
Check for proper gas ow. Ensure that ignitor is lighting burner.
Check ame sensor current. Clears when heat call nishes
successfully.
E271 Soft lockout - Exceeded maximum number of
retries. Last retry failed due to the pressure
switch opening.
Check pressure (inches w.c.) of low pressure switch closing on heat
call. Measure operating pressure (inches w.c.). Inspect vent and
combustion air inducer for correct operation and restriction. Clears
when heat call nishes successfully.
E272 Soft lockout - Exceeded maximum number
of recycles. Last recycle due to the pressure
switch opening.
Check operation of low pressure switch to see if it is stuck closed
on heat call. Check pressure (inches w.c.) of high pressure switch
closing on heat call. Measure operating pressure (inches w.c.).
Inspect vent and combustion air inducer for correct operation and
restriction. Clears when heat call nishes successfully.
E273 Soft lockout - Exceeded maximum number of
recycles. Last recycle due to ame failure.
Check micro-amperes of ame sensor using control diagnostics or
eld-installed mode. Clean or replace sensor. Measure voltage of
neutral to ground to ensure good unit ground. Clears when heat call
nishes successfully.
E274 Soft lockout - Exceeded maximum number of
recycles. Last recycle failed due to the limit
circuit opening or limit remained open longer
than 3 minutes.
Shut down system. 1-hour soft lockout. Check ring rate and
air ow. Check for blockage. Clears when heat call nishes
successfully.
E275 Soft lockout - Flame sensed out of sequence.
Flame signal is gone.
Shut o󰀨 gas. Check for gas valve leak. 1-hour soft lockout. Clears
when ame has been proven stable.
E290 Ignitor circuit fault - Failed ignitor or triggering
circuitry.
Measure resistance of hot surface ignitor. Replace if open or not
within specications. 1-hour soft lockout. Clears when ame has
been proven stable.

Lennox EL296UHE Series Specifications

General

Brand	Lennox
Model	EL296UHE Series
Category	Furnace
Language	English