⚠️ Status: Obsolete
The Sentrol ESL 1500 is a legacy suppression panel. Replacement boards are no longer manufactured. A full system upgrade is highly recommended.
Common Sentrol ESL 1500 Trouble Codes
- ZONE TROUBLE: A conventional initiating zone has an open circuit or a missing end of line resistor which prevents the panel from properly monitoring the detectors.
- BELL FAULT: The notification appliance circuit has a wiring break or short that will prevent the horns and strobes from sounding during an emergency.
- BATTERY FAULT: The backup power supply batteries have fallen below the required standby voltage or are completely disconnected from the main board.
- GROUND FAULT: A bare field wire on either a zone loop or notification circuit has made physical contact with a grounded backbox or metal conduit.
Is your legacy Sentrol ESL 1500 Series panel displaying constant zone faults in your Austin retail shop or small office? Our licensed technicians can troubleshoot these conventional wiring issues and provide a clear path to upgrade your obsolete hardware to ensure full code compliance.