Recently while working on a roof top unit for a walk in cooler, I came across the question of wether to charge or not to charge. R-22 *****. Ambient air outside @ 23 degrees. Hi side @ 155#. Lo side @ 12#. Sight glass is full. Cooler room temp is @ 39 degrees. Unit seems to recover rather quickly. I suspect a slight low charge. What would you do?
thanks-Fire and Ice