A technician is taking measurements from three AC units using R$-134$A refrigerant with the following results:

$\backslash$table$[[$Unit A: High Side:,$170,$psia,$106$ F$,$Low Side: $60$ psia,$62$ F$],[$Unit B: High Side:,$170$ psia,$112$ F$,$Low Side:,$60$ psia,$40$ F$],[$Unit C: High Side:,$170$ psia,$95$ F$,$Low Side:,$60$ psia,$62$ F$]]$

For each Unit, determine if the unit is operating properly, and if not, what may be the problem $($under charge, overcharge, or OK$),$ and the logic used to determine the problem.