I called this customer to see when they wanted to do the Semi-annual fire suppression system service at the Bakery, it is due in March. He said that today is good. I loaded everything up and let him know I would be there in about 45 minutes. I arrived and checked the Range Guard system out for any defects or changes needed. I then started the inspection and testing of the system. I changed out the fusible links then I wrote the inspection report out and gave it to the customer via email. I let them know I would call again in 6 months when the system would be due for a re-check.