Dear forum fellows;

We have TRANE chiller RTWA-216 and one of its motor is having high RLA (about 400% ~ 700 A ) at start-up followed by breaker trip.
It is worthy to mention that in last season it operated normally .Motor Megger results are also not bad.

It remained shut-down for many months and the only work that has recently been done is replacement of its cable from main panel.

Please guide what possible reasons may be and how to troubleshoot it.

Thanks in advance