What does the error code on the Liq-UID pressure sensor mean?

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Fault LED Flash Code of 12*. The fault LED will be flashing in groups of twelve flashes. This indicates that the Liq-uid Pressure Sensor is reading out of range. (1)Read the DC voltage at the Liquid Line Pressure Sensor plug J9 test point + VP and the 24 AC volt common terminal T5 with the sensor plugged in.

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