Reason for displaying E3 code:
1. is generally caused by fluorine deficiency. Just check whether the low pressure is 4.5kg. If it is low, check whether there is leakage or not, and replenish fluorine.
2, that is, the low-voltage switch is faulty or the line connected to it is open and needs maintenance.
3. Check whether there is an open circuit in the switch and check the lead, which can generally be solved.
4. Whether the ambient temperature is too low.
5. Control failure or system failure.
6. Judge whether the connecting wire and plug of indoor unit and outdoor unit are loose.
E3 solution; Less fluorine, add fluorine to fill the leak.