This month’s troubleshooting situation involves an air-to-air, package unit heat pump that is approximately 8-years old, and the customer’s complaint is that, rather than providing cooling, it’s just blowing warm air.
The equipment in this month’s article is a two-stage air conditioning system. The operating conditions are high ambient, and the customer’s complaint is that there is no cooling.
While troubleshooting and repairing refrigeration systems, a common problem is a starved evaporator, meaning not enough refrigerant is entering the evaporator for the heat load placed on it.
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In this troubleshooting situation, the equipment is a walk-in refrigeration system in a busy restaurant that has experienced a compressor failure…specifically a mechanical failure.
In this troubleshooting situation you’re called out to a tavern to check on a beverage storage unit that, according to the complaint, is “not keeping things cool”.
Many single-phase compressors require a start capacitor to assist in starting the motor. These capacitors will occasionally fail, causing a compressor to fail to start.
How does a tech know the a/c compressor he or she is diagnosing is actually failed and that the problem is not a crankcase heater, condenser fan, or rubbed out wire?
There’s no doubt that Internet of Things (IoT)-enabled technology has impacted the HVACR industry. Now, the technology is evolving even further, allowing HVACR manufacturers to include built-in diagnostics and troubleshooting in the equipment itself.