1.
Rated Frequency Operation
12 Servicing Information
12.1. Distinction Of Lead Free (PbF) Printed Circuit Board
•
Printed circuit boards (manufactured) using lead free solder will have a PbF stamp on the Printed Circuit board.
CAUTION
•
Pb free solder has a higher melting point than standard solder; typically the melting point is 50 - 70°F(30-40°C) higher.
Please use a high temperature solder iron and 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).
•
If you must use Pb solder, please completely remove all of the Pb free solder on the pin or solder area before applying Pb
solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
12.2. Troubleshooting
During troubleshooting and servicing, rated compressor operating frequency must be obtained in order to check the
specification 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) Heating
Press the Auto button continuously for 8 seconds or less than 11 seconds, the air conditioner starts operation at Heating rated
frequency. (“beep”“beep” will be heard at the 8th second.)
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CS-E24DKE CU-E24DKE
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