5820XL Trouble Codes

The panel has lost primary AC power and is running on battery backup.

A fault has been detected on the auxiliary power output circuit.

The system has detected that the standby battery voltage is below the acceptable threshold, indicating the batteries are depleted or failing to hold a charge.

The system has detected that the battery voltage is below the required threshold for reliable operation, typically less than 85% of its rating.

An address has been assigned to more than one detector on the SLC loop.

A smoke or heat detector is reporting a fault condition to the panel.

A point or circuit has been manually deactivated, preventing it from initiating or responding to alarms.

An earth ground fault occurs when the panel senses an unexpected flow of current from one or more of its terminals to the earth connection (Terminal 2).

SLC devices are not being recognized by the control panel, indicating a communication failure with a programmed device.

A fault (open or short) has been detected on a Notification Appliance Circuit (NAC).

The panel has detected a failure or loss of voltage on telephone line 1.

A specific point or circuit has been manually taken out of service, preventing it from initiating an alarm or activating an output.

The connected system printer has run out of paper.

The system printer is not communicating with the control panel.

Communication failure or hardware fault with an SBUS expansion module.

A short circuit has been detected on the Signaling Line Circuit wiring.

The panel has lost the return path for a Class A SLC loop configuration.

The system detects a supervisory condition, which indicates that a monitored device like a tamper switch or duct detector is in an off-normal state.

A supervisory point, such as a tamper switch or duct detector, has been activated.

A user-initiated condition where the panel attempts to restore itself to normal operation after an alarm or trouble condition has been cleared.

The digital communicator failed to transmit a report to the central monitoring station.

A device is present on the SLC loop that has not been programmed into the system configuration.

A programmed SLC device is no longer communicating with the panel.

A fault has been detected in the wiring or switch of a water flow initiation circuit.