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02-14-2013, 03:57 PM #1
York Chiller VSD 503 "Motor Controller Loss of Current"
The entire power assembly was replaced on this chiller VSD as well as the vyper logic board. The run light on the vyper board shows up but no lights on the individual driver boards. Its like its commanded to run but not running, eventually the drive trips out of loss of current because it's obviously pulling no current.
Anybody have any suggestions?