Alarm 14 Danfoss — Ground Fault
At a glance
- Severity
- FAULT STOP
- Domain
- DRIVES
- Reference standard
- IEC 61800-5-1
- Product / context
- Earth fault
What it means
Ground fault detected on the drive output side (motor cable or motor windings). The drive has detected a leakage current to ground exceeding the configured threshold. This type of fault is hazardous to both personnel and the drive and requires immediate intervention.
Probable causes
- Deterioration of motor cable insulation (moisture, abrasion, aging)
- Motor winding fault with ground contact
- Condensation inside the motor after a long standstill period
- Motor cable too long without an output filter (capacitive discharges)
Where to start
Disconnect the motor cable from the drive terminals (U/V/W). Measure the insulation of each phase to ground (PE) with a 500V DC megger. Are the values above 1 MΩ?
Full guided diagnosis in the app
The diagnostic tree for this fault has 7 guided steps with measurements, checks and resolutions. You'll find it in ElectraIQ, one of the five IndexOS apps: free, works offline.
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