Aux. 24V fuse failed
Source-checkedAuxiliary 24 V output fuse failed
The panel has detected operation of the monitored self-resetting 500 mA auxiliary 24 V output protection.
9 fault records for this panel, each labelled with its review status and, where one is cited, the source document it comes from. One- or two-loop analogue addressable control panel supporting Apollo, Argus Vega and Hochiki detection, with optional networking and I/O expansion.
9 records
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.
Syncro AS: Double address fault
Per the manual, the control panel can detect devices that have been set to the same address and will announce a “Double address” fault if it finds any. It cannot tell which devices are double addressed. To help find them, go to access level 2, choose the view devices option, view devices by loop, and check that all of the expected devices are listed. If there is one double address fault and one device missing from the expected list, it is fairly certain that the missing one is the one that has been addressed incorrectly. With more than two devices on the same address, or more than one double address, the manual says to find them by a process of elimination. It also notes that if a heavily populated loop is disconnected the panel reports all devices disconnected, and after reconnection it can be quicker to restart the panel with the Reset switch.
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 fault/disabled indicator
The sounder fault/disabled indicator lights when any output treated as a sounder is faulty or disabled. Syncro AS treats an output as a sounder when its Silenceable and Evacuate Output attributes are selected. The same outputs are disabled by the 'Disable All Sounders' menu option.
Unexpected network card
The panel has detected a newly installed network card not yet stored in its configuration.
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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.
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