The Archives

For many years, the most popular DC Drive on the market was the Reliance MaxPak and MaxPak Plus drives.   EMA has done MaxPak DC Drive repairs and field service for over 20 years. Read More

EMA performs Siemens Simoreg DC Drive repairs, and has done so for many years.

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One of the most common uses for VFD s is controlling the speed of airhandlers and blowers. In fact, one could argue that hvac airhandling equipment has been the primary driver of VFD sales for several years.  EMA is a major supplier and service center for airhandler VFD s.  We sell and do field service almost every day on airhandler VFD s. Read More

EMA has been performing  the Emerson or Control Techniques Mentor DC Drive repairs for many years.  This drive was introduced some years ago, and has been through several model changes. While the software and keypad configurations have changed a bit, overall the various drive models are fairly similar. Read More

Sabina Drives was founded by Les Tjelmeland and at one time, was a major player in the DC Drives world. Their headquarters was in California, and they had a facility in Hazleton, PA.   EMA purchased the Hazleton facility in 2005. Read More

If you’re like me, you cannot stand that dreaded phone call you seem to get when you first sit down at your desk on a Monday morning.  You’ve yet to sip your coffee, heck you probably haven’t even removed your coat.  The last place you really want to be right now is sitting in a cold, dreary office away from the comfort of your warm, cozy bed.  Read More

Since EMA is a repair facility, we see all types of VFD s in our shop, including ABB VFD s. Given that ABB is a major player in the drive industry it’s imperative that EMA technicians are well versed in troubleshooting ABB VFD s. The  common VFD troubleshooting techniques apply to all manufacturers, but there are a few ABB VFD specific troubleshooting techniques that could push you in the right direction.   Read More

One of the most common inquiries we get here at EMA is for training on VFD s (Variable Frequency Drives).  Often however, it isn’t often cost effective to teach this to a small number of people on site.   We are offering an intensive two day seminar on Industrial VFD s in Norcross, Georgia on April 18th and 19th. Read More

Yaskawa is replacing their popular E7 HVAC VFD with their newest offering, the Z1000 VFD. EMA will continue to carry the E7’s in stock for the next few months, and I encourage our customers with an installed base to consider buying a spare drive. Read More