Arrived at location on 7/4/21 - Found the compressor running, drawing low amperage, and there was no difference between the suction and discharge pressure. Our local supplier did not have a compressor in stock, so I told the customer that they were going to need to move the food elsewhere until we can get a compressor for it. I also noticed one wire of the three phase power was partially melted and that feeds power to over half of the refrigeration equipment. I told the head Chef (Ryan) that they may want to get an electrician there as soon as possible to pull a new wire. Returned to location on 7/6/21 - Picked up new compressor and drove to site. Removed existing compressor, filter drier and site glass and installed new compressor, site glass and filter drier. Ran vacuum on new compressor and removed existing compressor from roof. Charged with 24lb of 404a refrigerant and turned unit on. Unit began to cool. Freezer got down to set point and cycled off. Walk in freezer is working p