York y cam b 360 tuv

[mr slim]

Hi guys

just wondering if anyone has some drawings for york ycam b 360 tuv.
I have got both compressors faulting on compressor thermsitor before start up.
After turning the power on and off a few times i eventually get one compressor to run and the other compressor runs then trips out on high pressure within a few minutes although all fans are running.
I have blown the condenser coil through and i would say the fans appear to be running at the same speed as the other circuit so im begining to think there may be non condenseables in the system.
Any pointers would be appreciated.

[al]

A start would be pressures in the system, are these bristol compressors or semi hermetics?
What refrigerant?

al