Urgent request received at an office building in Burbank California. Site reported that their server room air conditioner had failed. Sent our local technician to investigate. Found the RUUD unit iced up at the evaporator. De-iced coil manually and check refrigerant charge. Unit low on refrigerant causing the ice. Unit has had multiple leaks in the past and is in poor condition. Recommending customer to replace, made repairs and recharged for temporary function.