Burner controls, ignition and flame safeguards
Siemens LME7 Series Burner Control fault codes
What all 11 Siemens LME7 Series Burner Control fault codes mean, in plain words, with a risk grade for each. These come from the manufacturer's own manual. The fix for each one is in WERCS Diagnose.
Get the fixes · plans from $49/moUpdated July 22, 2026
| Code | What it means | Risk |
|---|---|---|
| Loc 2 | No establishment of flame at the end of safety time The Siemens flame safeguard locks out the burner because a flame was not established at the end of the safety time. | RED |
| Loc 4 | Extraneous light The Siemens flame safeguard locks out the burner because it detects extraneous light inside the combustion chamber. | RED |
| Loc 7 | Loss of flame The Siemens flame safeguard locks out the burner because the flame was lost during operation. | RED |
| Loc 10 | Error not relatable (application), internal error The Siemens flame safeguard locks out the burner due to an internal application error that cannot be related to a specific fault. | RED |
| Loc 14 | POC error The Siemens flame safeguard locks out the burner due to a proof of closure error. | RED |
| Loc 22 | Safety loop open The Siemens flame safeguard locks out the burner because the safety loop is open. | RED |
| Loc 60 | Analog power source 4 to 20 mA, I < 4 mA The Siemens flame safeguard locks out the burner because the analog power source dropped below four milliamps. | RED |
| Loc 83 | Faulty PWM fan The Siemens flame safeguard locks out the burner because it detects a faulty pulse width modulation fan. | RED |
| Loc 139 | No program module detected The Siemens flame safeguard locks out the burner because it cannot detect the required program module. | RED |
| Loc 206 | AZL2 incompatible The Siemens flame safeguard locks out the burner because an incompatible display module is connected. | RED |
| Loc 225 | Faulty PWM fan The Siemens flame safeguard locks out the burner due to a faulty pulse width modulation fan. | RED |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.