A commercial customer in Delano, CA, reported that their beer coolers had stopped cooling. Our technician inspected the refrigerators and found a failed condenser fan motor and blade. New parts were ordered, tech returned and replaced the fan motor and blade and tested all components. Unit online. Noted that a separate unit on the roof was making noise. Inspected and found system #2 low on refrigerant. Will return to continue repairs on condenser #2 once approved, unit #1 up and running.