A firmware update failed, was interrupted, or was rolled back. The controller is running its previous, known-good firmware.
| At a glance | |
|---|---|
| Code | 550 |
| Shown as | Firmware Update Failed |
| Severity | Warning |
| Category | 5xx — System / lifecycle |
| Clears | Stays in the alarm history |
The update did not complete — it failed, lost power or network part-way, or failed its checks on first start — so the controller went back to the firmware it had.
Runs the previous firmware normally.