What effect would an overcharge with refrigerant oil have on a system and how would it be detected?
What will be an ideal response?
Condition 4 A system that is overcharged with refrigerant oil may have a high-side pressure that is abnormally high and the high-side lines and hoses are vibrating and/or pulsating. This will also be accompanied by high duct temperatures and poor cooling performance. This is both a difficult condition to diagnose and repair. In excess, oil in the refrigerant system acts as a heat insulator and takes up space. Too much refrigerant oil in the system will cause the compressor to work harder to displace it and in the process increase system temperatures and pressures. Typically the high-side gauge will read a higher pressure than a static temperature/pressure chart would indicate. In a system that contains an excess amount of oil the outside temperature of the high-side line will be cooler than the static temperature/pressure chart would indicate but the pressure will be higher than the measured temperature would indicate on the static temperature/pressure chart.
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