Solution:

Turn on the machine and check whether the internal flat cable and coil lead fall off.

Check whether the components on the board are in good condition (such as black resistance).

Check solder joints (virtual welding, missing welding, etc.). ).

Touch CPU and LM339 to see if the heat is too high.

E0 stands for high temperature (the main sensor is broken). That is, the main sensor is faulty. Sensor is a kind of detection device that can sense the measured information, and can convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.

Eo treatment in the incubator is as follows: If the power switch is normal, the fault mostly occurs in the insulation switch. First, check whether the reed of the bimetallic strip presses the switch contact rod. If it is pressed too tightly, bend it upward with tweezers until the distance between them is 0.5- 1 mm ... If the distance between the bimetal and the contact rod of the switch is normal, disassemble the switch box and clean and maintain the contacts and reeds of the insulated switch.