High pressure switch.
This warning does NOT indicate the status of the high pressure switch itself, but of the compressor contactor. The high pressure switch acts directly on the compressor contactor. If the card con-trols the switch-on of the compressor, and the contactor is not activated after 3 seconds, this signal appears. This alarm can also be caused by a defect in the functioning of the transmission system relay from the compressor contactor to the card (indicated as RAP in the wiring diagrams). If the contactor is deactivated while the com-pressor is functioning, this warning reappears. AP.