How to solve chigo air conditioning E4 fault?

1. chigo air conditioning E4 indicates temperature fuse disconnection protection or communication failure between the main controller and the display. Second, the solution: 1. Low voltage. 2. Long-term low-load operation leads to poor cooling of the press. 3. Coolant leakage leads to poor cooling of equipment. This unit is short of oil. 5. Temperature fuse protection. 6. It is recommended to check whether the plug-in is loose and whether the circuit board is soldered. Extended information: Precautions for air conditioning are as follows: 1. Before use, check whether the remote controller is in good condition, whether the installed battery is qualified and whether the power is sufficient. 2. Check whether the setting status indicator is in the first gear of cooling (summer) or dehumidification. Avoid cycling between several modes, especially between cooling and heating modes. If you accidentally switch to the heating (summer) mode, please turn off the power first, and restart it after 10 minutes. 3. Don't switch the air conditioner frequently, and don't switch the power supply frequently because the room temperature reaches (or is higher than) the required value. The air conditioner is regulated by a thermostat. When it is not used for a long time, it is safe and energy-saving to turn off the power supply and unplug it.