Why is there condensation on a pipe near my furnace?
I believe you may have a charge related problem. When ac systems start having icing issues they stop effective cooling a low charge can cause ice to form on the evaporator high moisture in the air you see , sometimes with severe icing it takes hours for the ice to melt, the system may run ok for a short period of time then start icing up. A simple recharge can solve this very common problem , if a R22 system note the cost of this refrigerant is very high +100 per pound a 5 ton system usually has 11-13 lbs and will need 5-7 lbs in most cases.