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DSE controllers show this as a text alarm on the display, not as a numbered code.
An earth (ground) fault has been detected in the generator output circuit. Earth faults indicate dangerous leakage of current to ground, which can cause electrocution hazards, equipment damage, and fire risk.
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Minimum acceptable insulation resistance is typically 1 megohm per kV of rated voltage, measured with a 500V or 1000V insulation tester. New equipment should be 100+ megohms.
No. Earth faults create electrocution hazard and fire risk. The generator should be shut down and the fault located and repaired before resuming operation.
Send us the code or alarm and what the generator is doing, and one of our engineers will help you diagnose it.
Search other controller alarms and engine fault codes, with troubleshooting steps, in Generator Oracle.
Launch Generator Oracle →Full diagnostic guide
A fault code names a symptom, not a cause. Our engineers have written the diagnostic sequence they use on site for this class of fault — ranked causes, ordered steps with the reading expected at each one, and the point at which to stop and call someone.
All diagnostic guides in the Repair Centre