Commercial service call in Ft Worth and Upon found RTU 1 not cooling. Checked RTU and found the compressor not running. Connected gauges and found the system empty on refrigerant. With approval from Robert performed a leak search. Found where One of the capillary tubes was rubbing against one of the U-bends on the evaporator coil. With approval from Robert again, repaired leak, pressure tested system again and pressures held. Pulled a vacuum down to 488 microns. Charged unit up with 6lbs. System is now cooling properly at this time.