GND FAULT: EST3 Trouble Code | Fire Alarm Resource Center

What This Code Means

The SFS1-CPU module has detected an unintended connection between a system circuit and the earth ground.

Common Causes

1Damaged wire insulation
2Water in conduit
3Pinched wires in backbox

Resolution Steps

Inspect field wiring for contact with the building ground or conduit. Use a multimeter to isolate the specific circuit leg causing the fault and repair the insulation or connection.

Manual References(2)

1edwards estEST3Installation2008p. 8Open

2edwards estEST3XInstallation2013p. 21, 24, 26, 27, 30 +5Open

Related Codes

TROUBLEA general fault condition exists within the system, indicating the alarm system may not function correctly.ALARMThe system has detected a fire or other life-threatening emergency condition.CPU FAILThe central processing unit has detected an internal processor failure.Dirty Devices > 80%An addressable smoke detector has reached a high level of contamination and requires immediate cleaning or replacement.Active Test TroubleA trouble is reported if devices are left in an active state after canceling a service group test.

Edwards EST EST3

What This Code Means

Common Causes

Resolution Steps

Manual References(2)

Field Notes

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