Lennox SL280UHV Error Codes

Equipment type not specified · Ducted Heating

• . Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF).
• A Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm…
• C Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting…
• E000 No error in memory
• E105 Device communication problem - No other devices on BUS (Communication system).
• E110 Low line voltage.
• E111 Low line voltage.
• E112 Ground not detected.
• E113 High line voltage.
• E114 Line voltage frequency out-of-range.
• E115 Low 24V - Control will restart if the error recovers.
• E116 High 24V.
• E117 Poor ground detected (Warning only).
• E120 Unresponsive device. Communication only.
• E124 Active communicating thermostat signal missing for more than 3 minutes.
• E125 Control failed self-check, internal error, failed hardware. Will restart if error…
• E131 Corrupted control parameters (Verify configuration of system). Communicating only.
• E150 A2L Refigerant leak alarm
• E151 A2L Sensor fault (sensor problem) (communication mode only)
• E180 Outdoor air temperature sensor failure. Only shown if shorted or out-ofrange.
• E200 Hard lockout - Rollout circuit open or previously open.
• E201 Indoor blower communication failure - Unable to communicate with blower motor.
• E202 Indoor blower motor mis-match - Indoor motor horsepower does not match unit capacity.
• E203 Appliance capacity / size is NOT programmed. Invalid unit codes refer to configuration…
• E204 Gas valve mis-wired.
• E205 Gas valve control relay contact shorted.
• E206 Gas valve second-stage relay failure
• E207 Hot surface ignitor sensed open.
• E223 Low pressure switch failed open.
• E224 Low pressure switch failed closed.
• E225 High pressure switch failed open.
• E226 High pressure switch failed closed
• E227 Pressure switch open during trial for ignition or run mode.
• E228 Combustion air inducer calibration failure
• E229 Ignition on high fire
• E240 Low flame current - Run mode.
• E241 Flame sensed out of sequence - Flame still present.
• E250 Limit switch circuit open.
• E252 Discharge air temperature too high (gas heat only).
• E270 Soft lockout - Exceeded maximum number of retries. No flame current sensed.
• E271 Soft lockout - Exceeded maximum number of retries. Last retry failed due to the pressure…
• E272 Soft lockout - Exceeded maximum number of recycles. Last recycle due to the pressure…
• E273 Soft lockout - Exceeded maximum number of recycles. Last recycle due to flame failure.
• E274 Soft lockout - Exceeded maximum number of recycles. Last recycle failed due to the limit…
• E275 Soft lockout - Flame sensed out of sequence. Flame signal is gone.
• E290 Ignitor circuit fault - Failed ignitor or triggering circuitry.
• E292 Indoor blower motor unable to start due to obstructed wheel, seized bearings.
• E295 Indoor blower motor temperature is too high.
• E310 Discharge error temperature sensor failure. Only shown if shorted or out of range.
• E311 Heat rate reduced to match indoor blower air flow.
• H Gas Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting…
• U Discharge Air Temperature
• d Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting displayed / Pause /…
• dF Defrost mode.
• h Heat pump stage (1 second ON, 0.5 second OFF) / % of input rate displayed / Pause / cfm…

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.