ACCA: July Tech Challenge ANSWER

A commercial split heat pump system in the cooling mode @ 88° F outdoor ambient, utilizing R-410A, has a customer complaint of no cooling. The system has TXV metering devices on the indoor and outdoor coils with check valves. The symptoms at the business confirm that the compressor and indoor blower are running continuously. What are the “possible causes” with the following measured conditions on this field service check sheet? Note that in the cooling mode, the condenser is the outdoor coil, and the evaporator is the indoor coil.