Battery Fault: FlexES Trouble Code | Fire Alarm Resource Center

What This Code Means

The FACP indicates a fault when battery resistance is too high, voltage drops below the discharging limit, or a connection/fuse issue is detected.

Common Causes

1Battery voltage lies below the final discharging voltage (less than 21 V DC)
2Excessive contact resistance (> 200 mOhm) at the battery terminal clamps or connecting cables
3Battery not connected, deep-discharged, or defective
4Defective fuse
5Fault in the resistance measurement (no load present)

Resolution Steps

Check the battery connection lines and terminal clamps for high resistance. Ensure batteries are not deep-discharged (below 21 V DC); if they are, they must be recharged externally or replaced. Verify the fuse is intact. Ensure only batteries of the same type, manufacturer, and capacity are connected. New batteries must be recharged for at least 24 hours (48 hours if older than nine months) before system start up.

Manual References(1)

1esserFlexES ControlInstallation2010p. 49, 53, 48, 51, 40 +15Open

Related Codes

essernet connection interruptionA break or wiring error has been detected in the essernet communication loop.Tamper contactThe tamper contact is used to monitor whether the control panel's housing has been opened and can be used to automatically deactivate components for servicing.Panel or essernet device not receiving powerA device on the essernet is not receiving power or is completely disconnected.EARTH FAULTThe system has detected an unintended connection to ground or an incorrect configuration of the earth fault detection jumpers on multiple power supply modules.Wrong address settingThe essernet module has detected an invalid or conflicting address configuration after a restart.

ESSER FlexES

What This Code Means

Common Causes

Resolution Steps

Manual References(1)

Field Notes

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