BATTERY LOW
Legacy record reviewedBattery Low Voltage
The standby battery voltage has dropped below the low-voltage threshold under load. This typically indicates a battery nearing end of life or a charger issue.
Reviewed
Advanced Electronics Advanced MxPro 5 fault records
5 fault messages this panel shows on site, each with what it means and the document it's drawn from.
Fault records
CABINET TAMPER
Legacy record reviewedPanel Cabinet Tamper
The panel internal tamper switch has been triggered, indicating the panel enclosure door has been opened without authorisation.
Reviewed
LINE FAULT
Legacy record reviewedSounder Line / Output Fault
A monitored output circuit (sounder, bell, relay output) has reported an open or short circuit. The panel monitors these circuits with an end-of-line (EOL) device.
Reviewed
LOOP OPEN
Legacy record reviewedLoop open circuit
An open circuit has been detected on a detection loop: a wiring break or a disconnected device.
Reviewed
LOOP OPEN CIRCUIT
Legacy record reviewedLoop Open Circuit
The panel has detected an open circuit (break) in the loop wiring. All devices beyond the break will be reported as missing. Short circuit isolators (SCIs) will segment the fault.
Reviewed
Related products
Related reading
Advanced MxPro 5 Fault Finding: Panel Messages and Diagnostic Steps
A practical fault-finding guide for the Advanced MxPro 5 fire alarm panel — covering common fault messages, loop diagnostics, device faults, and network issues.
Advanced MxPro 5: Common faults and how to clear them
A guide to the most common faults on the Advanced MxPro 5 fire alarm panel — network faults, loop faults, PSU faults, and how to clear them on site.
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.