EST4 Trouble Codes

A life-safety emergency condition has been detected by an initiating device.

A shorted circuit has been detected on the Signature loop controller (SLC) wiring, which typically reports a trouble condition on all devices on that circuit.

Controlled building equipment such as dampers, fans, or temperature controls are not operating correctly.

A firefighter telephone handset has been plugged into a remote phone jack.

The Carbon Monoxide sensing element in a detector is nearing the end of its expected life.

This condition occurs when a substituted device is a different model than the suspect device but is preprogrammed with the same device address.

One or more system inputs or outputs have been manually disabled by a user.

The control unit enters the trouble state when a point, module, or logic group is manually isolated from the system, preventing the processing of status change signals until it is re-enabled.

A mass notification or non-fire emergency event has been triggered.

The system detects a low resistance path (approximately 10 kΩ or less) between a circuit conductor and earth ground, or voltages outside the range of 12.3 VDC to 16.8 VDC during testing.

The circuit resistance is higher than the main impedance setting, indicating a poor connection.

The power supply voltage has dropped below the minimum operating threshold.

The power supply has detected that the batteries cannot support the required system load.

The circuit resistance is lower than expected but not a direct short.

An addressable smoke detector has reached a contamination level of 20% or greater.

An addressable smoke detector has reached a contamination level of 80% or greater and is at high risk of false alarm.

The main processor for a network node has failed, causing the system to enter degraded mode.

The initiating or notification circuit has a break in the wiring or a missing end-of-line resistor.

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

A user or node is requesting to take control of the system functions.

A short circuit has been detected on the IDC or NAC circuit wiring.

The control unit enters the supervisory state when a point signals a supervisory condition, such as a valve tamper switch activation or a system-level supervision fault.

The Modem Communicator has detected a fault on one or both of the supervised telephone lines.

General fault within the system hardware or wiring that prevents normal operation.