Starter#: VSD351 T-46
This chiller has been intermittently tripping on "High phase X(a-b-c)
instantaneous over current".
It is not isolated to one specific phase, it will fault on "A" Then "B", or "C".
It will go months without tripping then do it 7-10 times in a 4-6 hour period. Then go weeks or months without a trip.
It has been doing this about 2 years intermittently. Chiller is about 5 years old and runs 24/7 /365
Have checked all connections, all good.
Replace micro-board about a year ago due to some comm issues, but was doing this before replacing board.
Have a Fluke power line monitor on it now, have recorded some power dips of
8-10 Milliseconds. But, the time of dips do not match up with time stamp of
diagnostics in Optiview. Yes, times are sync.'d between analyzer and optiview.
I still suspect a power line issue, but just don't have the proof yet.
Any thoughts or suggestions from York gurus would be greatly appreciated.