Upon arrival found back right rooms not cooling. Checked RTU and after looking at system i realized I was on the wrong unit, system that does those rooms was RTU 5. Checked RTU and notice that the blower would come on but compressor wouldn’t. Checked to see if contactor was getting 24v and it wasn’t. Checked high and low pressure switch and both had continuity through them. Jumped out both pressure switches and contactor still wouldn’t pull in, checked to see if board was sending out voltage and it wasn’t. Pushed contactor in while blower was running and found that the package unit was almost empty of R-22 refrigerant. R-22 refrigerant was discontinued in 2020. Called to get pricing on board from shearer and they had to check with there parts department to see if the control board is even available. Recommended replacing the package unit and will need to build estimate to replace unit. Also brad wanted to know if we have any standalone units to use for those rooms. Also brad wants to s