Error 02 Mean Temperature too high

There is three temperature sensors

Temperature 1: temperature sensor on mainboard

Temperature2: Temperature sensor on DC-DC circuit of mianboard

Temperature3: Temperature sensor on MPPT board

c. You can confirm which board needs to be replaced based on the 3 temperature value
d. You should replace temperature sensor firstly, if still abnormal, then you can replace relevant board.
The temperature data of 02 warning has a characteristic. Usually, the temperature of a certain sensor is dozens of degrees higher than the other three, reaching the alarm point. This is most likely a problem with the sensor itself, and you can try to replace the sensor to solve the problem. The other is the overflow of the sampling temperature data, and the value starts with 655. This is usually caused by the corrosion of the old model plate and the open circuit. You can update the special program to avoid it, or replace the plate to solve the problem.

SPF 5000ES MPPT board Temperature sensor