was wondering if u guys could help me out with this one. we do mostly residential and light commercial work at the company where i am employed. here is my dilemma: hardware store with a carrier 48tj rtu not performing adequately, unit has a small leak in circuit #1. my suction pressure is 79 p.s.i.g. with a suction temp. of 79-80 degrees, but the chart says that i should be closer to 62 degress. I dont want to add more refrigerant because the discharge is running at about 375 psig. the unit does have hp and lp cutouts. the condenser coil doesnt look very dirty at all but i know looks can be decieving. this all took place at about 5:30 pm on friday and all the tech support is out for the weekend, any help would be greatly appreciated. unit is approximately 4-5 yrs old.