I'm trying to fix a Saftronics PC7 Mini Vector drive that fails with "over current" when started when it is cold. If it is powered up for hours then it works much better. I disconnected the motor and it fails the same way.
The drive is configured for 230 V 1-phase input, but the shop has 3-phase power so the input (two phases) will be about 30 V lower than expected. I'm not getting a low input failure, but I'm wondering if the low input voltage could cause such problems?
If you know of any web site where I can learn the basics of VFD I'd appreciate it if you could provide a link. I found and printed the PC7 manual but apparently www.Saftronics.com (Fort Myers, Florida) is no longer in business. The PC7 might be a relabeled Yaskawa but I'm not sure about that either.
Thanks for any help you can give to this VFD beginner!
The drive is configured for 230 V 1-phase input, but the shop has 3-phase power so the input (two phases) will be about 30 V lower than expected. I'm not getting a low input failure, but I'm wondering if the low input voltage could cause such problems?
If you know of any web site where I can learn the basics of VFD I'd appreciate it if you could provide a link. I found and printed the PC7 manual but apparently www.Saftronics.com (Fort Myers, Florida) is no longer in business. The PC7 might be a relabeled Yaskawa but I'm not sure about that either.
Thanks for any help you can give to this VFD beginner!