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Category: Tech Challenge

Tech Challenge November 2020

A commercial split heat pump system, in the cooling mode @ 88° F. outdoor ambient, utilizing R-410A, has a customer […]

Tech Challenge

A rooftop utilizing R-410A with a TXV feed device has a customer complaint of insufficient cooling.The symptoms confirm inadequate cooling […]

Tech Challenge September 2019

A split A/C system utilizing R-22 with a TXV feed device (and receiver) has a customer complaint of “insufficient cooling.” The symptoms confirm inadequate cooling and the compressor appears to be running […]

Tech Challenge July 2019 – Answer

A freezer utilizing R-22 with a TXV metering device (and receiver) has a customer complaint of “warm case.” The symptoms at the […]

Tech Challenge July 2019

A freezer utilizing R-22 with a TXV metering device (and receiver) has a customer complaint of “warm case.” The symptoms at the […]

Tech Challenge May 2019 – Answer

A commercial rooftop utilizing R-410A with a TXV feed device(and receiver)has a manager complaint of “no cooling.”The symptoms confirm inadequate […]

Tech Challenge May 2019

A commercial rooftop utilizing R-410A with a TXV feed device(and receiver)has a manager complaint of “no cooling.”The symptoms confirm inadequate […]

Tech Challenge March 2019 – Answer

A rooftop system utilizing R-22 with a fixed orifice has a customer complaint of insufficient cooling.The symptoms confirm the thermostat […]

March 2019 Tech Challenge

A rooftop system utilizing R-22 with a fixed orifice has a customer complaint of insufficient cooling.The symptoms confirm the thermostat […]

Tech Challenge January 2019 – Answer

A medium temperature cooler utilizing R-134a with a TXV metering device with receiver, has a customer complaint of “warm product.” […]

Tech Challenge – January 2019

A medium temperature cooler utilizing R-134a with a TXV metering device with receiver, has a customer complaint of “warm product.” […]

Tech Challenge – November 2018 Answer

A frozen food case utilizing R-507A with a TXV metering device (and receiver) has a customer complaint of “warm product.” […]

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