Fault codes by panel

The panel's auxiliary 24V output current draw is above its normal operating range (0-500mA) — an overload on equipment powered from the AUX terminals. From the official Advanced MxPro5 User Manual's Local Hardware…

The standby battery voltage has dropped below the panel's normal operating band (nominally 27.6V). From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists…

The standby battery voltage is above the panel's normal operating band. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as one of the…

The battery charger's output voltage reading is above the normal operating band. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as one of…

The battery charger's output voltage reading is below the normal operating band (nominally 28.0V). From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists…

The panel display shows the affected zone and device text with "DEVICE MISSING" alongside the device type (e.g. "(MULTI.SENSOR)"), from a worked example in the official Advanced MxPro5 User Manual (section 3.3, Fault…

The panel's internal earth-monitoring circuit (Earth Volts) reads outside its normal band. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists Too…

Yellow LED indicator. Indicates that there is a fault condition in the Fire Brigade signalling equipment. From the official Advanced MxPro5 User Manual (LED Status Indicators table, section 2.2). This is the User…

The loop current reading is above the normal operating range — an overload condition on the detection loop. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23),…

The loop current reading indicates an open-circuit state on the detection loop. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists Open Circuit as…

The loop current reading indicates a short-circuit state on the detection loop. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as one of the…

A supervised sounder output circuit (Sounder A/B, and C/D on the 5400) reads open circuit. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as…

A supervised sounder output circuit reads short circuit. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as one of the possible circuit…

Yellow LED indicator. Indicates the presence of a fault in one or more sounder wiring circuits. From the official Advanced MxPro5 User Manual (LED Status Indicators table, section 2.2). This is the User Manual, not the…

A sounder circuit's load current is above the normal operating range. From the official Advanced MxPro5 User Manual's Local Hardware diagnostic table (section 3.9.7.2, pp.22–23), which lists this as one of the possible…

Yellow LED indicator. Indicates the presence of a system fault. From the official Advanced MxPro5 User Manual (LED Status Indicators table, section 2.2). This is the User Manual, not the fuller Installation and…

From the panel's own "View - Panel" diagnostic table: Aux Supply is monitored 0mA-500mA; the panel reports Too High when the current exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: Battery is monitored 0V-30V, normal >25.0V; the panel reports Too High when the reading exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: Battery is monitored 0V-30V, normal >25.0V under full load. Per the manual's own note, the voltage shown is measured under full load conditions; if it falls below…

From the panel's own "View - Panel" diagnostic table: Charger is monitored 0V-30V, normal 27.6V; the panel reports Too High when the reading exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: Charger is monitored 0V-30V, normal 27.6V; the panel reports Too Low when the reading falls below the expected range.

Shown against the specific loop address, zone and location text on the display, e.g. "1 004.0 DEVICE MISSING" under the zone's fault list. Indicates the panel is no longer receiving a response from that addressed device.

From the panel's own "View - Panel" diagnostic table: Earth Monitor is monitored 0V-30V, normal 1.3V; the panel reports Too High when the reading exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: Earth Monitor is monitored 0V-30V, normal 1.3V; the panel reports Too Low when the reading falls below the expected range.

Applies only when the Routing Interface is set to Monitored (Section 3.3.15.8). Function LED3 (Yellow) indicates a fault in the transmission path of the fire routing connection, and also illuminates if there is a fault…

From the panel's own "View - Panel" diagnostic table: each loop's load is monitored 0mA-500mA; the panel reports Too High when the current exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: each loop's load is monitored 0mA-500mA; the panel reports Open Circuit when the reading falls outside that range in the open direction. Loop Load, V.Out and V.In…

From the panel's own "View - Panel" diagnostic table: each loop's load is monitored 0mA-500mA; the panel reports Short Circuit when the reading falls outside that range in the short direction.

From the panel's own "View - Panel" diagnostic table: Sounder A/B Load is monitored 0mA-1000mA; the panel reports Too High when the loop current exceeds the expected range.

From the panel's own "View - Panel" diagnostic table: Sounder A/B is monitored 0V-14V, normal 5.5V; the panel reports Open Circuit when the reading falls outside that range in the open direction.