ESSER FlexES

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What This Code Means

The system has detected an unintended connection to ground or an incorrect configuration of the earth fault detection jumpers on multiple power supply modules.

Common Causes

1Earth fault detection jumper is active on PSM 2 or PSM 3 when using more than one module
2Protective earthing (PE) connection is not connected to the correct terminal
3Functional earth (FE) is not connected to the PE rail
4The fire alarm system is connected to an IT power supply system

Resolution Steps

Deactivate the earth fault detection using the jumper on the side of PSM 2 and PSM 3 if more than one power supply module is used. Ensure the network side protective earthing (PE) connection is connected to the correct terminal and the functional earth (FE) is connected to the PE rail. Verify that the system is not connected to an IT power supply system.

Manual References(1)

1esserFlexES ControlInstallation2010p. 43, 45, 71, 49, 27 +13Open

Field Notes

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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.Wrong address settingThe essernet module has detected an invalid or conflicting address configuration after a restart.Battery FaultThe FACP indicates a fault when battery resistance is too high, voltage drops below the discharging limit, or a connection/fuse issue is detected.Battery fault (excessive contact resistance)The system has detected excessive resistance (> 200 mOhm) at the battery terminals or cables.