Beko BKP-09C, Service Manual, Page: 7 / 23

Step 3.
⑴
open the batter cover of the remote control, see photo 5.
⑵
make sure the battery is right.
。
Chapter 2.
Repair when the unit is not able to on
2.1 Electric control theory
As we learnt from the picture, there are strong and
weak electricity in the whole circuit
and the cut-off point is transformer.
When the strong electricity part is powered, two 50A relays RY6 and RY2 will
respectively control PTC heater and compressor. The current goes through fuse and then,
up-motor, down-motor, swing motor and water-spray motor. Up-motor has three speeds, and
respectively controlled by three 5A relays, which are RY1, RY3, RY4. They indicate
respectively high, middle and low speed. Only one of the three relays could be connected
at one time. When RY1 is connected, the up-fan speed is high; When RY3 is connected, the
up-fan speed is medium; When RY4 is connected, the up-fan speed is low. The starting
capacitor is 2uf/450V.The down-motor has two speeds and is controlled by two 5A relays,
RY8 and RY9 respectively. When RY8 connected, fan speed is high; when RY9 connected, fan
speed is low. The starting capacitor is 3 uf/450v.The swing motor is a step motor and
controlled by relay RY7.The water-spray motor is a electrode-covered motor and controlled
by RY5 relay.
Weak electricity part could be divided into two parts. One part is power supply,
another part is micro-control. The electricity becomes 13.5V alternate current through
transformer, and then is bridge-rectified by four IN4001 diodes. After rectification,
the current becomes 18.5V D.C through C2 capacitor, and goes through 7812 regulator and
becomes 12V stable current. The current then is divided into two routes. One route is