The KLIMA Is probably bad -- the signal goes from the PBCU to the
KLIMA to the low pressure switch on the receiver/dryer. If the
KLIMA relay has burned contact, it won't switch the compressor on no
matter what you do as the clutch current goes only through that
relay contact set.
Check the resistance of the clutch coil as well -- a shorted clutch
will simply burn out another KLIMA relay in sort order.
Peter
Another disagreement I had with the esteemed Herr Doktor. He argued
that the Klima never fails. I've had many fail. I've not had a
compressor clutch coil fail yet, but I'd never say they don't fail.
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