The error code "3 x blue blinks" is namely caused by PCU overheating, but is also triggered by any unexpected microcontroller halt. To solve this error, follow the instructions below.
- Reboot the PCU by switching the fuses off-on.
- If this helps and the 3 x blue blinks disappear, there's no need to do more. If the problem recurs 2-3 times in a short timeframe, it is advised to replace the PCU.
- Renew the radio connection between the sensor unit and the PCU
- See instructions "Manual Adjustment mode 2 (Manual setup of the wireless connection)" or follow the same steps in the Installation manual.
- If this helps and the 3 x blue blinks disappear, there's no need to do more.
If the problems persists, it is advised to replace the PCU.