I cleaned the condensate pan and drain lines and ran hot water to flush the debris and to make sure it was draining properly and that the condensate pump was working. I then operated the unit on cooling speed #9 and set the flow rate to 10.5 gpm and confirmed proper flow rate and heat of rejection. I checked the electrical wiring and electrical systems, all are within specification. Customer uses a special filter which was still in good condition. Coil and blower wheel are very clean. Unit operating normal.