By reading this blog, you will learn about different error codes that can appear on your Aux Air Conditioner, their meanings, and the troubleshooting steps to fix them.
| ERROR CODE (display board) | ERROR CODE (wired controller) | DESCRIPTION |
| L1 | C1 | The fault with the over-electric current protection |
| L3 | C3 | The fault with the compressor The power supply Phase deficiency protection |
| L4 | C4 | The fault with the inverter module protection (IPM) |
| E1 | E1 | The fault with the room temperature sensor (Tico) on the indoor unit |
| E2 | E2 | The fault with the temperature sensor (Ticm) on the outdoor unit |
| E3 | E3 | The fault with the temperature sensor (Ticm) on the indoor unit |
| E4 | E4 | The fault with the fan motor of the indoor unit |
| E5 | E5 | Communication error between the outdoor unit and the indoor unit |
| E8 | E8 | Communication error between the display board and PCB of the indoor unit |
| F0 | F0 | The fault with the fan motor of the outdoor unit |
| F1 | F1 | The fault with the inverter module protection on the outdoor unit |
| F3 | F3 | The fault with the compressor starts |
| F4 | F4 | the fault with the discharge temperature sensor |
| F6 | F6 | The fault with the environmental temperature sensor (Tao) on the outdoor unit |
| F7 | F7 | The fault with the over-voltage or low-voltage protection |
| F8 | F8 | Communication error between the driver PCB and the main PCB of the outdoor unit |
| F9 | F9 | The fault with the outdoor unit EPROM |
| H1 | H1 | The fault with the drainage |
| H2 | H2 | Communication error between the wired controller and the main PCB of the indoor unit |
| H5 | H5 | the fault with the low-temperature discharge temperature sensor AUX DC Inverter Free Match 50HZ R32 |
| H6 | H6 | the fault with the low-pressure switch |
| H7 | H7 | the fault with the low-pressure |
| H8 | H8 | the fault of the four-way valve |
| P2 | J2 | the fault with the High-pressure switch |
| P5 | J5 | Protection high-temperature discharge |
| P6 | J6 | The fault with anti-high-temperature protection of the indoor unit in the heating mode |
| P7 | J7 | The fault with the anti-frozen protection of the indoor unit in the heating mode |