Aux. 24V fuse failed
verifiedAuxiliary 24 V output fuse failed
The panel has detected operation of the monitored self-resetting 500 mA auxiliary 24 V output protection.
9 fault messages this panel shows on site, each with what it means and the document it's drawn from. One- or two-loop analogue addressable control panel supporting Apollo, Argus Vega and Hochiki detection, with optional networking and I/O expansion.
Auxiliary 24 V output fuse failed
The panel has detected operation of the monitored self-resetting 500 mA auxiliary 24 V output protection.
Bad data fault
The panel has received invalid loop data from one device on four consecutive polls.
Standby battery disconnected
The panel power-supply monitoring cannot detect the connected standby battery set.
Standby battery low voltage
The monitored standby battery voltage has fallen to the panel low-voltage threshold.
The panel has detected leakage to earth; the manual specifies indication below 30 kOhm from +28 V or 0 V to earth.
Mains supply failed
The panel power-supply monitoring has detected loss of the mains supply.
Sounder/Bell Circuit Fault
A monitored sounder or bell circuit has reported an open or short circuit. The circuit is monitored at rest to ensure sounders will function when called on.
Unexpected network card
The panel has detected a newly installed network card not yet stored in its configuration.
Zone Open / Short Circuit
A conventional zone circuit has reported an open or short circuit fault. Kentec Syncro AS monitors zone wiring with end-of-line resistors (EOLR).
Records marked “sourced — not yet independently verified” carry a real citation but have not yet completed formal review. Always confirm against the manufacturer's current documentation before acting on site.