marc is currently with a british manufacturer doing 'stuff'

carrier were big fans of partwind compressors..


the first stage should have an interlock on the contactor which will prevent it from pulling in unless the contactor is energised.

however there is usually no interlock on the power thus if the fuses have blown it will sense that the contactor has pulled in and will energise and run on one set of windings

fualty control circuit could include rapid cycling of the contactor, not energising at all ,too long a delay between stages

i feel that you should first find out which set of windings burnt out then report back..

not much -but it's a start ;-)

cheers

richard