What do the error codes displayed on the Mijia Refrigerator Cross Door 510L mean and how to deal with them?

The error codes and the code explanation are as follows:
CodeNew CodeCode Explanation
UC or tp or H50UCDisplay board communication failure
rS or H02rSRefrigerator sensor failure
FS, H01FSFreezer sensor failure
rd/Refrigerator defrost sensor failure
Fd, H05FdFreezer defrost sensor failure
ES, H07ESAmbient temperature sensor failure
bS, H18/Change temperature sensor failure
CS, USUSi Fresh sensor failure
Ed, H31/Defrost heater failure
dr, U10/Door switch failure
dL/Left door switch of the refrigerator failure
dF/Left door switch of the freezer failure
dS/Right door switch of the freezer failure
rF/Refrigerator fan failure
FF, H29FFFreezer fan failure
LF/Condenser fan failure
E9, H85
Unable to connect to the Internet
/Wi-Fi communication failure