Delta Electronics - Others - Recent Questions, Troubleshooting & Support
How to solve the GFF error in delta Vfd-g
A GFF error on most Vfd's refer to a in-proper ground, no ground detected , or a possible ground loop. Ground loops are a common mistake, where in the attempt the user grounds two or more devices or the load to the vfd as well as the mains ground.
the model your using is a three phase input, it can handle delta or wye, style of wiring, but all require a good ground source. If anything, just run a dedicated ground to each device and don't run ground wires to each other. It's only used for voltage reference between the phases. Without it, the vfd cannot work properly and will error.
on Dec 27, 2017
When i turn on the drive it display it display code for ground fault. my wiring are correct. And i cannot use keypad of drive. how can i resolve the fault
why cant you use the keypad/'display of drive, is it not lit up ? if so you most likely have a grounded phase on the load side (motor) I suggest disconnecting motor completely and measuring to ground with a high voltage tester (megger) if you have a phase to ground then all the power that drive puts on that wire will shunt to ground , causing infinite current , this will affect the power supply of drive and not allow drive to even power up correctly
also you failed to mention if motor was 3 phase if so , some drives require installer to remove shunt jumpers (see install directions) this will "Lift" the surge suppresors off earth ground and over to "virtual" ground that occurs at center of three phase power , this might be seen as a ground fault if this is not done correctly
on Jul 14, 2017
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