Arrived to do a performance maintenance. Started inspection inside and measured a temperature split between return and supply air. Measured power consumption of the blower motor and checked system for cleanliness. Found that the blower wheel is coated in dust debris and there is bacterial growth present on the evaporator condensation pan. Performed a static pressure test and found that the system is operating well outside manufacturers specifications. Set a time for a field supervisor to come out and finish the diagnosis. Went outside and verified system refrigerant charge. Verified operation of all mechanical and electronic components of the condenser. Found that the capacitor is failing for the condenser. Rinsed system free of debris. Air conditioning system is operational at this time.