Looking for help with a York Ycal0030 chiller. Called out on unit for low suction cut out alarm. Tested pressures, and found display was reading 40 psi differ than actual pressure. Suspected suction tranducer, ordered, no difference, called York factory service, as i had no tech info on chiller. Said I was loosing 1 vdc fron trancducer and should replace cable from tranducer to micro proccesser board (J-4), replaced cable. Still reading approx 40 psi lower than actual pressure. Obtained service manual and am still missing voltage from transducer, could this voltage drain be in the microprocessor board? Keeping unit running by putting old transducer on dicharge service port, as this is a surgury center, and they say is critical , no back up system but that is a whole nother topic.