What condition(s) can cause excessive pressure conditions on the high side of a self contained (active) recovery device?

Excessive pressure conditions on the high side of a self-contained recovery device can be caused by several conditions, including overfilling of the recovery cylinder, high ambient temperatures leading to increased vapor pressure, and system blockages that restrict refrigerant flow. Additionally, malfunctioning components such as pressure relief valves or faulty pressure gauges can contribute to elevated pressure levels. Proper maintenance and monitoring are essential to prevent these issues.