Model reference
Lennox SL280DFV
Furnace
1 document20 error codes3 service modes
Available documentation
Service Manual
- SL280DFV Series Units Service Literature44 pg
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Error codes (20)
CodeMeaning
1+2Low flame signal1+3Flame sensed out of sequence2+3Low fire pressure switch sensed open; 80%2+4Low fire pressure switch sensed closed prior to activation of combustion air…2+5High fire pressure switch sensed open; 80%2+6High fire pressure switch sensed closed prior to activation of combustion air…2+7Low fire pressure switch opened during ignition trial or heating demand.3+1Primary / Secondary limit switch open.4+1Watchguard4+2Watchguard4+3Watchguard4+5Watchguard4+6Watchguard4+7Watchguard4+8Watchguard5+1Hard lockout5+2Control failed self check, internal error (control will restart if error…5+3No earth ground (control will restart if error recovers).5+4Reversed line voltage polarity (control will restart if the error recovers).5+5Low 24V (control will restart if voltage rises to normal).Service modes (3)
- Blower Motor Troubleshooting (Speed Tap Test via J46)["1. Disconnect power to unit.","2. Disconnect plug J46 from P46 located on the blower control…
- Clearing Error Codes["1
- Error Code Review["1
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