Arrived at location on 7/15/22 - The GFI was tripped so I ohmed out the unit, but my meter did not show any continuity to ground. I reset the GFI and the unit came on and began cooling. I noticed the condenser was dirty so I blew it out with nitrogen. The cooler came down to temp and cycled off. The manager told me that they power wash the diamond plate wall which houses the GFI, and I believe that may have been what caused it to trip. She gave me the ok to install an in use weatherproof cover on the GFI to prevent this from happening again.