What is true about contaminants in a high-voltage (HV) air conditioning system?

In high-voltage air conditioning systems, even small amounts of contaminants can lead to significant faults and issues. Contaminants such as moisture, dirt, non-condensables, and different types of oils can compromise the efficiency and operation of the system. For instance, moisture can mix with refrigerant and form acids, potentially causing corrosion within components and leading to system failure. Similarly, dirt can accumulate in sensitive areas, disrupting airflow and causing the system to operate inefficiently or even fail.

When it comes to lubricants like PAG oil, the presence of other oils or contaminants can disrupt the intended chemical and thermal characteristics, affecting the proper lubrication of moving parts. High-voltage systems can be particularly sensitive, as they often operate at higher pressures and temperatures, which can exacerbate the effects of even negligible amounts of contaminants.

By recognizing that any level of contaminant can trigger problems, technicians are better prepared to maintain the integrity and performance of HVAC systems, reinforcing the importance of keeping systems clean and well-maintained.