GROUND FAULT IS MINUS: MXL Trouble Code | Fire Alarm Resource Center

What This Code Means

This condition indicates a low impedance connection between the negative side of a field wiring circuit and earth ground.

Common Causes

1Low impedance to the negative side of one of the field wiring circuits to earth ground
2Improperly grounded enclosure
3Conduit ground used instead of earth ground

Resolution Steps

If the message is other than OK, locate the loop and the device responsible. display automatically changes to OK when the ground fault problem is corrected.

Manual References(1)

1siemensMXL-IQInstallationp. 146, 102, 149, 151, 148 +16Open

Related Codes

GROUND FAULT IS PLUSThe system has detected a positive ground fault on the field wiring.AC Fail or BrownoutPrimary AC power is missing or below the brownout level; the System is running on battery backup.GROUND FAULT IS MINUSThe system has detected a negative ground fault on the field wiring.GROUND FAULT IS OKThe system ground fault test has passed and no ground faults are currently detected.[custom message] [device type] IN SUPA condition indicating that a monitored device or system has changed to an off-normal state, which takes priority over security and trouble conditions.

Siemens MXL

What This Code Means

Common Causes

Resolution Steps

Manual References(1)

Field Notes

Related Codes

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