Samsung air conditioner error codes
Displayed on the indoor unit or remote when a fault is detected. Always isolate power before inspecting a unit — repairs belong to a qualified technician.
| Code | Meaning | Applies to | |
|---|---|---|---|
| C5 | Malfunction protection of jumper cap (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E1 | High-pressure protection of the system (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E101 | Indoor unit communication error. | All models | Details |
| E102 | Communication error between indoor and outdoor units. | All models | Details |
| E108 | Duplicate device address error on the communication network. | All models | Details |
| E121 | Indoor room temperature sensor fault. | All models | Details |
| E122 | Indoor EVAP IN temperature sensor error (short or open). | All models | Details |
| E123 | Indoor EVAP OUT temperature sensor error (short or open). | All models | Details |
| E154 | Indoor fan motor or fan system error. | All models | Details |
| E163 | EEPROM option data error on the indoor PCB. | All models | Details |
| E2 | Anti-freezing protection (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E3 | System blockage or refrigerant leakage (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E4 | High discharge temperature protection of compressor (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E5 | Overcurrent protection (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E554 | Gas leak detected by the outdoor unit protection logic. | All models | Details |
| E556 | Indoor and outdoor unit capacity mismatch error. | All models | Details |
| E6 | Communication malfunction (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| E8 | High-temperature resistant protection (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| EE | EEPROM malfunction (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| EU | Limit/decrease frequency due to high module temperature (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F0 | Gathering refrigerant (pump-down mode) (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F1 | Indoor ambient temperature sensor open or short circuit (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F2 | Indoor evaporator temperature sensor open or short circuit (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F3 | Outdoor ambient temperature sensor open or short circuit (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F4 | Outdoor condenser temperature sensor open or short circuit (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F5 | Outdoor discharge temperature sensor open or short circuit (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F6 | Limit/decrease frequency due to overload (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |
| F8 | Decrease frequency due to overcurrent (applies to the AR09-AR24TSHGAWKN midwall range). | All models | Details |