Ok guys I had a IGBT board blow up on the vsd module. It was not hard to find what was wrong with it . just was not sure why it did it i know there was power lost and then about 4 hours later the vsd blew up.. the motor meg ok. i know it put a lot of stress on everything in there. anyway i just installed a new VSD module kit and replaced the trigger board. those were the only parts i could see that were damaged. after starting the chiller i got a code phase C gate driver. i have done all the steps to make sure if the OSCD logic board is working properly. i have moved pins J8 J9 and J10 around and i still get the same thing. pushing the test button on the logic board only has the
-C not working. all 6 lights on the IGBT board lit up. i have done the test procedure on the IGBT module and also on the Harmonic filter IGBT module. They both check out ok. but there are only 5 lights that are on the IGBT module for the Harmonic filter.....or are all 6 supposed to be lit up?
is there any other way to check the filter logic board and the OSCD logic board to see if they are bad before having to change them out?
I have read the manual and did everything it said to do. I am not a York employee or JCI, technical support will not talk to me. I have talked with several other techs and no one can figure this out. Are there any kind of resets on the CTs that is causing the phase imbalance?
model number YT K3 D1 E3-CNJ This is a 351hp I also had to change out the Breaker in the drive ..
Thanks Helpful input would be great..