What is the after-sales telephone number of Beijing Chunlan air conditioner?
First of all, it is best to determine whether the wire connecting the control panel is loose. Then check whether the gear of the sliding door is missing, and you can replace the accessories of the bracket.
Secondly, unplug the plug for a while before plugging it in. Wait a moment to see if it will automatically return to its original position and if FC is still displayed on the screen. If so, congratulations, it's all right! Now you can press the power button of the remote control to use it normally!
Finally, it is solved in two steps.
1. test method
Use a multimeter to measure the voltage between the upper and lower legs of the needle holder CN6 on the board. The normal situation is as follows:
A. After the door is opened, it is 5V on the top and 0v on the bottom;
B. After the door is closed, it is 0V on the top and 5v on the bottom;
C the door is in the middle state, with 5V on the top and 5V on the bottom.
2. Check the state of the sliding door and its solution.
When "FC" appears, judge the state of the door first, and then measure the voltage between the upper and lower parts to see if it is normal (compare with the above figure). Generally speaking, there should be problems.
If it's not normal, see if it's up or down. The solution is to unplug and plug in the wire, and then try again. If it is still the same as the original fault, then it may be that the photoelectric switch is broken or there is a structural problem (the photoelectric switch is not stuck). We can only take down the machine to see if the photoelectric switch is blocked. If it is blocked, but the measured voltage is still problematic, it means that the photoelectric switch is broken and replaced (note that the photoelectric switch is in the receiving board K).