I would verify the SF. Also, check the rated temperature rise of the motor. If the temp rise is not over 40ºC, then the required overload setting is FLA * 125%, otherwise it's FLA * 115%. [NEC 430-32(c)]
So if your FLA is 30 amps, in all likelyhood the OL setting is 37.5 or thereabouts.
Just my opinion, but even if the OL isn't tripping, I think having a 30 amp motor with a 1.0 SF running at 36 amps is an incorrect application. I'd plan a replacement. I'd also tach down the fan speed, if possible. Something's causing the overload condition, and I wouldn't jump on a motor defect as the first suspect (although anything's possible).
Radar
