MXL Trouble Codes

Primary AC power is missing or below the brownout level; the System is running on battery backup.

Display of the current AC input voltage to the system power supply.

The system prevents acknowledging supervisories or troubles while an unacknowledged alarm exists.

Display of the current being used to charge the system batteries.

Display of the current system battery voltage during a power test.

An initiating device has entered the alarm state, indicating a fire or emergency condition.

A security-related device has been activated, indicating a potential security breach or monitoring event.

A supervisory condition has been detected, typically indicating that a monitored fire protection system component is in an abnormal state.

The system has detected a negative ground fault on the field wiring.

The system ground fault test has passed and no ground faults are currently detected.

The system has detected a positive ground fault on the field wiring.

This condition indicates a low impedance connection between the negative side of a field wiring circuit and earth ground.

The system is powered and functioning correctly with no active alarms, supervisories, or troubles.

The user attempted to access the supervisory list or acknowledge menu, but there are no active supervisory conditions.

A smoke detector has reached a threshold near its alarm point but has not yet reached full alarm status.

A condition indicating that a monitored device or system has changed to an off-normal state, which takes priority over security and trouble conditions.

This message is displayed when the system performs a Soft Reset, indicating the system is initializing before returning to Normal mode.

This is a security-type message for the tamper switch on the SMB-2 board when the system is selected for UL 1076 operation.

A general system trouble has occurred, indicating a fault that may prevent the system from operating correctly.