Burner controls, ignition and flame safeguards
Fireye MicroM Burner Control fault codes
What all 7 Fireye MicroM 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 |
|---|---|---|
| Lockout Intrlck Open | Lockout Intrlck Open The running interlock circuit was open when it needed to be closed, causing the control to lock out. | RED |
| Lockout Check Scanner | Lockout Check Scanner The control detected a scanner problem like a defective shutter or false-firing UV tube and locked out the system. | RED |
| Lockout Check BLOWN FUSE | Lockout Check BLOWN FUSE No power was detected on terminal three due to a blown chassis fuse, causing the control to lock out. | RED |
| Lockout Flame Fail - AUTO | Lockout Flame Fail - AUTO The burner locked out because the flame signal was lost during normal firing operation. | RED |
| Lockout Flame Fail - MTFI | Lockout Flame Fail - MTFI The burner locked out and shut off the fuel because the main flame was not detected during the main ignition trial. | RED |
| Lockout Flame Fail - PTFI | Lockout Flame Fail - PTFI The burner locked out and triggered an alarm because the pilot flame was not detected during the ignition trial. | RED |
| Lockout False Flame - STANDBY | Lockout False Flame - STANDBY A false flame was detected during standby, causing the safety circuit to keep fuel valves closed and lock out the control. | RED |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.