EMA is one of the most respected VFD Repair Companies in the country. It’s not something we take for granted or lightly. There are a number of fine VFD repair companies around, but it’s an industry that’s changed. EMA has the highest customer satisfaction rating of any VFD repair company that we know about. A few years ago, VFD repair companies spent most of their time repairing small horsepower VFDs. That was driven by two things; the relatively high cost of VFDs, and the relative ease at which VFD repair companies could obtain repair parts on small VFDs.
As a general rule, most VFD repair companies find that lower horsepower VFDs cost more in parts and time to repair than to replace; that’s changed the VFD repair industry.
At EMA, like most other VFD repair companies, our VFD repair business has migrated toward repairing higher horsepower VFD s.
However, there are exceptions. Our goal, in every case, is to do what’s best for our customer. There are times, when a small, no longer manufactured, VFD is so entrenched into a particular machine or system, that replacing it is more expensive than repairing. Even though the VFD repair may actually exceed the original cost of the VFD.
EMA is a VFD repair company that does servo repairs as well. Servo drives, although generally small, are high performance units that have high initial costs. Once integrated into a complex system, they’re also difficult to replace. Even though the repair costs can sometimes be significant, for many customers, its the most cost effective thing to do.
So, what goes wrong with VFD s? In general, VFDs are quite reliable. You’ll find some other posts within our blogs and newsletters that detail several repair suggestions, but here’s a list of common failures.
- Loose connections. Don’t laugh, its a major cause of VFD downtime. Check simple stuff first. Is a plug on the main circuit board loose? Try that first, before trying a more complex VFD repair.
- Cooling Fans. Major cause of problems. Some VFD s will let you know about this, but most won’t until you begin tripping on over temperature. The over heating can and almost certainly will cause major issues long term, so check this often.
- Electrolytic Capacitors. These have relatively short lives compared to other components, and, overheating shortens it even more.
- Power Semiconductors. These are less common, but drastic failures. If this happens, do NOT just replace the IGBT or Diode, find out why if failed. Or, you’ll likely just be replacing it again as soon as you power up.
- VFD Software or programming. Was it running before you tried changing a parameter? Then put it all back to where it was and see if that fixes it. Don’t automatically install factory suggested software revisions until you back up what’s running. In general, if its running fine now, leave the programming alone.
- Circuit boards. These are much less common failures than one might think, but is often the first thing suspected when an inexperienced technician begins to repair a VFD.
Almost any VFD repair company will talk a good game. Expertise does matter, but everyone has dealt with “experts” that were not pleasant to deal with. EMA is a VFD repair company that enjoys over a 98% “fully satisfied” rating with customers. We don’t know of anyone else close. Do we have expertise? Of course, but even more, we’re great at the ‘high-touch’ side of VFD repair.
You’ll enjoy your experience with us. The best VFD repair company in the country.
Call 770-448-4644770-448-4644 or hit one of the contact methods on the right of this page. No-one, Anywhere, is better at drives than we are.