1. Rated Frequency Operation13 Servicing InformationCaution:• Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please usea high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).• Pb free solder will tend to splash when heated too high (about 1100° F/600°C).13.1. TroubleshootingDuring troubleshooting and servicing, rated compressor operating frequency must be obtained in order to check thespecification and technical data. Below are the methods used to obtain rated compressor operating specification.(a) Cooling(i) Press the Auto button continuously for 5 seconds or less than 8 seconds, the air conditioner starts operation at Cooling rated frequency.(“beep” will be heard at the 5th second.)(ii) Short the service terminal (CN-S) of the outdoor printed circuit board. The operation of air conditioner is Cooling rated frequency.(b) HeatingPress the Auto button continuously for 8 seconds or less than 11 seconds, the air conditioner starts operation at Heating ratedfrequency. (“beep” “beep” will be heard at the 8th second.)92CS-E15DKEW CU-E15DKE / CS-E18DKEW CU-E18DKE / CS-E21DKES CU-E21DKE
