the tube temperature sensor of the indoor unit is broken, just replace it.
meaning code of air-conditioning failure in Dunham Bush, Yantai
1, E1 protection: high-voltage protection for the system. When the high-voltage protection is detected for 3 consecutive seconds, other loads except the light box are turned off, all keys and remote control signals are shielded, and the indicator light flashes and displays the fault code E1.
2. E2 protection: indoor anti-freezing protection. In refrigeration and dehumidification mode, the compressor was started for 6min, and for 3min
, T steaming <: When the temperature is -5℃, the indicator light flashes and the fault code E2 is displayed, and the compressor and the external fan are stopped; When t steamed >: When the temperature is 6℃, < P > and the compressor has been stopped for 3min, the indicator light will go out, the LCD will resume displaying, and it will run in the original state. Unshielded keys.
3. E3 protection: low voltage protection for the system. The compressor starts to detect the low-voltage switch signal after 3min. If the low-voltage switch is detected to be disconnected for 3min
continuously, the whole machine stops, the indicator light flashes and the fault code E3 is displayed, so as to prompt the fluorine leakage.
4. E4 protection: high temperature protection for exhaust pipe. After the compressor is started, when the exhaust temperature is higher than 121℃ or the exhaust temperature sensor is short-circuited (or open-circuited) for 31 seconds continuously, the indicator light flashes and the fault code E4 is displayed.
5. E5 protection: under-voltage protection. After the compressor is running, if the current exceeds 25A for 3 consecutive seconds, the indicator light flashes and the fault code E5 is displayed.
6. EH protection: electric heating failure. "BB" alarm sounds, and the red light flashes. When the ambient temperature >: At 35℃, forced into refrigeration. The reasons for the failure are as follows:
1) The AC contactor is stuck inside, so it needs to be replaced.
2) The fuse is not working properly, so it must be replaced.