Tech confirmed that main split system is on PSA. Mini split is not. Mini split doesn’t work. See previous diagnosis. Tech checked pressures on customer request. Tech found green dye in system, but system does not appear low on R22. Swept indoor and outdoor coils. Found no leaks. Compressor megged caution “yellow” at 100 megohms. System is cooling. Will check again next visit. Outdoor coil shows some signs of saltwater corrosion. Tech recommended planning for system replacement in the near future.