Category: Tech Challenge

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.” […]

Tech Challenge – November 2018

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

Tech Challenge – September 2018 Answer

A medium temperature cooler utilizing R-134a with a capillary tube feed device has a customer complaint of warm beer. The […]

Tech Challenge – September 2018

A medium temperature cooler utilizing R-134a with a capillary tube feed device has a customer complaint of warm beer. The […]

Tech Challenge – July 2018 Answer

A rooftop utilizing R-410A with a fixed orifice metering device has a customer complaint of “no cooling.” The symptoms confirm […]

Tech Challenge – July 2018

A rooftop utilizing R-410A with a fixed orifice metering device has a customer complaint of “no cooling.” The symptoms confirm […]

Tech Challenge – May 2018 Answer

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

Tech Challenge – May 2018

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

Tech Challenge – March 2018 Answer

A split air conditioner utilizing R-410A with a TXV feed device (and receiver) has a customer complaint of “warm, no […]

Tech Challenge – March 2018

A split air conditioner utilizing R-410A with a TXV feed device (and receiver) has a customer complaint of “warm, no […]

July 2017 Tech Challenge – Answer

A freezer utilizing R-402A with a TXV metering device (and receiver) has a customer complaint of “warm case.” The symptoms […]

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