McQuay Air Cooled Chiller

[waseem]

Hi

i have a problem with McQuay air cooled chiller
McEnergy HA 105.2 ST , Carel Microproccessor

Compressor 1 is not starting up and always there is alarm of : High pressure switch

i replaced pressure switch and the problem still , i make a bridge shant on it from controller ?!! and the problem still ...

any one can help with regards

Waseem

[GHAZ]

hi your pressure high transducer might need changing or re calibrating ,and also check in settings of trip point setting, some time the connector on the switch has damp or water in it