HVAC Excellence Commercial Air Conditioning ESCO Certification Practice Exam

In an overcharged air conditioning system utilizing a capillary tube metering device, the expected symptoms include an increase in discharge pressure, as well as an increase in suction pressure.

When the system is overcharged with refrigerant, it results in excessive refrigerant within the evaporator. This can lead to a higher refrigerant pressure at both the discharge (where the refrigerant exits the compressor) and the suction side (where refrigerant enters the compressor). An increase in discharge pressure occurs because the compressor is working against a heavier load due to the influx of additional refrigerant, while the higher suction pressure indicates that there is more refrigerant available in the evaporator.

Together, these symptoms are indicative of the system working inefficiently and could potentially lead to other problems, such as compressor damage or system failure. Understanding this behavior is crucial for HVAC professionals when diagnosing and troubleshooting air conditioning systems.