Ground fault protection has been triggered due to a ground fault in the output circuit during constant speed operation. The manual's first action is: “Stops the inverter output to protect the inverter from overcurrent due to a ground fault in the output circuit. This protection is effective only during startup of the inverter. If you turn ON the inverter without removing the ground fault, this protection may not work. (Applicable to inverters of 75 kW or below (3-phase 200 V) or 220 kW or below (3-phase 400 V))”
- Model
- Fuji Electric FRENIC-Eco
- Display shows
- Ground fault protection (OC3)
- Type
- Alarm code
- Source
- Manual p. 205
What OC3 means
Ground fault protection p. 205
Common causes
- During running at constant speed p. 205
What to do
- Stops the inverter output to protect the inverter from overcurrent due to a ground fault in the output circuit. This protection is effective only during startup of the inverter. If you turn ON the inverter without removing the ground fault, this protection may not work. (Applicable to inverters of 75 kW or below (3-phase 200 V) or 220 kW or below (3-phase 400 V)) p. 205
If OC3 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Fuji Electric service.
This page summarises what the manufacturer’s manual says about OC3; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fuji Electric. Found a mistake? Report an error.