Check whether the power supply is normal and whether the compressor is started. If the outdoor fan is running, the control circuit is basically normal.
Second, the voltage reason
If Daikin air conditioner can't be turned on, first check whether the external power supply has electricity and whether it reaches the rated voltage. If the voltage is not low, check whether the indoor unit and outdoor unit are connected correctly, whether the wires are aging, and whether the wiring of the indoor unit motherboard is correct, otherwise replace the indoor unit motherboard.
Third, the reason why the remote control mode is incorrect
First of all, check whether the remote control of Daikin air conditioner is set to cooling mode, adjust the mode to display "cooling" or "snowflake", and set the temperature below 26 degrees.
Fourthly, too high temperature leads to system protection.
If the temperature is too high, the compressor will automatically start the protection function and stop working to avoid compressor damage.
For the newly installed Daikin air conditioner, if the external unit does not turn, it is necessary to check whether its appearance is intact, and then open the mask to check whether the lines and electronic components in the electronic control device scratch the printed circuit board during transportation, resulting in virtual welding and circuit break.