How to deal with the E1 code displayed on the Xiaomi Smart Inverter Dehumidifier?

Turn the dehumidifier off for 5 minutes and then turn it on again. If the E1 code appears multiple times, please contact the after-sales service team for help.
The error code descriptions of the Xiaomi Smart Inverter Dehumidifier are as follows:
C2: Fan error;
C3: Communication error between display and motherboard;
E1: Pipe temperature sensor error;
E3: Open or short circuit of condenser thermo-bulb;
E4: Open or short circuit of exhaust thermo-bulb;
E9: Humidity sensor error;
H0: Excessive exhaust temperature protection;
H6: Fluoride deficiency protection;
L0: Compressor out-of-step protection;
L3: Compressor current effective value protection;
L4: Compressor module protection;
L5: Excessive compressor module temperature protection;
L7: Compressor phase loss protection:
U3/U4: DC input over-voltage protection;
H1: Overload protection;
H2: Compressor overload protection.