- Reaction score
- 10,219
He said that the second one burnt out in a day but see your point the C - forces could have destroyed bearings etc jamming motor and burning it out, the thought hadn't crossed my mind but think ive been spending too long on closed loop inverter controlled systems - got my blinkers on i think, but either way OP is lacking info and the guys he's had out to fix the motor dont seem to know what they are doing so a dead end for helping him.Motor speed is a major issue with fans. Centrifugal forces can destroy a fan. Seeing a fan launched out of the top of a building isn’t something I want so see again.