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Re: Robinair AC690PRO Fault code of 'HIGH PRESSURE'
Posted to HVAC Forum on 2/1/2020 2 Replies

High pressure means there is air in the cylinder or the transducer is defective or not calibrated. A likely cause is the ice that I am supposed to ignore. That is a leak, when under a vacuum air is sucked in that leak. Nitrogen and Oxygen ( air ) do not conden... Login to read more.

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