Solve the Puzzle: Fix this Danfoss VLT HVAC Variable Frequency Drive Malfunction!

Repairing the Danfoss VFD can be a challenge but following a few basic steps will get the system back online. This Danfoss VFD had an issue with the drive bypass not engaging power to the VFD due to a failed power supply and bad contactor.
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[@jonnymac31]

Good info. Thanks for the share.

[@Systemcontroltech]

Thanks for watching

[@coreyr8870]

Danfoss/trane vfds are not a favorite, parts delivery and support suck, we swap them out usually. Great video as usual. If this is a known failure point contactor why not just swap with a different brand?

[@Systemcontroltech]

I've got a replacement VFD ordered. Had to get parts to try to limp it along until then

[@Dev-0010]

Hi,,, my 75 kw vfd display not working please can you suggest me what is the problem

[@Systemcontroltech]

If it's a Danfoss drive, the problem will be either the display itself or the board it plugs into. I've got a video on my channel

[@Outtasomewhere]

How much they paying you for this?😅

[@Systemcontroltech]

Nothing so anything you want to contribute would be greatly appreciated

[@williamhuang5329]

Hanzhen harmonic drive gear , strain wave gear reducer, robot joint , over 30 years experience

[@Systemcontroltech]

Thanks for watching