We were called out to the restaurant because one of the ac units is not cooling. I 1st checked for 24 V at the unit above the ceiling, that's when I found the drain Pan completely full. I then proceeded to clear out the drain pan in order to get 24 volts to the compressor on the roof. I then proceeded to diagnose the unit on the roof. I was able to determine that the compressor is causing the breaker to trip. Thanks for choosing king's electric and air conditioning for your service needs. If you have any questions or concerns please call to speak with your service technician Ralphie.