Hi Guys,

YORK YMC2 has stopped / did not start because "MBC SPEED FAULT" has failed.
I've unplugged, checked wires, connectors, and fuses.
I put the equipment back on again and then manually,"pre-charge"DC BUS after manually "levitation rotor".
After that, the controller was restored to automatic operation.
Since then, the equipment is in order.
But I'm not calm, I do not know what caused the mistake and what made it better.
Do you have someone's experience in this regard?
What can I still check?
/I'm sorry for my writing, not my English is so good./
Regards, Janos