As we discuss in this brief, the administrationâs reports to the court do not preclude the Legislature from assessing the measures identified by the administration and considering its own strategy for compliance with the court ruling based on its priorities.
The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: 1  Refrigerant under-charge, due to a refrigerant leak or improper charge.  TXV (TEV) malfunction, over-metering refrigerant.
Low-Pressure Chiller Leak Detection and Monitoring Low-pressure chillers are typically centrifugal chiller type refrigeration systems operating under a vacuum in the evaporator section of the system. The condenser and compressor sections could be at a slightly negative pressure or up to 15 psig positive pressure.