This alarm does not indicate the status of the actual high pressure switch but the status of the contactor. If the Moducontol signals the compressor to start the high pressure switch must be closed. If the pressure switch is open the contactor will not pickup; the alarm will trip in three (3) seconds. The HP alarm will also alarm if the compressor is running and the contactor is suddenly deactivated. A broken wire or loose contact in this circuit will also cause an alarm.
