Commercial spring maintenance in Flower Mound and checked the cooling, checked all amp draws, capacitors, contactors, changed out filters. Checked belts, temperature split, cleared out all drain lines. Found that on RTU 1 circuit 1 is empty on refrigerant and belt needs to be replaced, on RTU 2 found circuit two empty on refrigerant, belts in both units need to be replaced BX-45. Put leak search pricing in quote, need to price out belts due to there not being a price for belts.