Burner controls, ignition and flame safeguards
Fireye YB110 Burner Management System fault codes
What all 7 Fireye YB110 Burner Management System 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 |
|---|---|---|
| LOCKOUT FALSE FLAME | LOCKOUT FALSE FLAME The burner locked out because the control detected a flame signal when no flame was supposed to be present. | RED |
| LOCKOUT CHECK SCANNER | LOCKOUT CHECK SCANNER The burner locked out because the control detected a problem with the flame scanner. | RED |
| LOCKOUT FLAME FAIL (AUTO) | LOCKOUT FLAME FAIL (AUTO) The burner shut down the fuel and locked out because it lost the flame signal during normal operation. | RED |
| LOCKOUT FLAME FAIL - MTFI | LOCKOUT FLAME FAIL - MTFI The burner locked out because the control failed to detect the main flame during the main ignition trial period. | RED |
| LOCKOUT FLAME FAIL - PTFI | LOCKOUT FLAME FAIL - PTFI The burner locked out because the control failed to detect a pilot flame during the ignition trial period. | RED |
| LOCKOUT M-D LIMIT OPEN - PTFI | LOCKOUT M-D LIMIT OPEN - PTFI The burner locked out because the low fire start interlock switch opened during the pilot ignition trial. | RED |
| LOCKOUT 3-P INTLK OPEN - PREPURGE | LOCKOUT 3-P INTLK OPEN - PREPURGE The running interlock circuit was open during prepurge, which causes the burner management system to lock out. | RED |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.