Display errors
Fujitsu air conditioner error codes displayed by the color indication of the outdoor unit.
| Fujitsu air conditioner errors | Diode red (number of flashes) | Diode green (number of flashes) |
| No communication between indoor and outdoor units | — | 2 |
| Violation of the wiring connection to the outdoor fan | — | 3 |
| Thermal sensor not connected | — | 4 |
| Electricity supply interrupted | — | 5 |
| There is no communication between the indoor unit and the remote control | — | 8 |
| Short circuit on the outside temperature sensor | 2 | 2 |
| Short circuit on the humidity sensor inside the device | 5 | 3 |
| The resistance of the mains in the area of the sensor is broken | 3 | 2 |
| There is no condensate drainage, the tube is clogged | 3 | 3 |
| The function of the temperature sensor is impaired (moisture, dust or dirt has entered) | 3 | 4 |
| The compressor is turned off by the sensor due to exceeding the threshold temperature. Check the current supply | 3 | 8 |
| Short circuit in the wiring, the air conditioner is turned off automatically | 4 | 2 |
| The main relay function is broken | 4 | 3 |
| The supply of electric current is interrupted. With this error of the Fujitsu air conditioner remove the batteries from the remote control, turn off the power to the indoor and outdoor units, leave for at least five minutes and try to turn it on. | 4 | 4 |
| The overvoltage protection of the air conditioner is activated | 4 | 7 |
| There is no mains power, the power outlet may be broken | 4 | 8 |
| Low voltage in the electrical network | 5 | 2 |
| Low voltage in the electrical network | 5 | 3 |
| Automatic shutdown of the compressor in case of overheating | 5 | 5 |
| No electricity supply to the outdoor unit fan | 5 | 6 |
| Fan short circuit | 6 | 2 |
| The indoor unit fan rotates slowly. Possible cause: lack of lubrication, broken motor bearing, broken motor itself, clogged fan | 6 | 3 |
| Insufficient refrigerant causing the discharge temperature to rise | 7 | 2 |
| The refrigerant pressure is extremely high, the unit is overheated. If this error occurs, the Fujitsu air conditioner should check the copper pipes, they may be bent | 7 | 3 |
| Broken pressure sensor | 7 | 5 |
| Clogged air conditioner filters | 8 | 2 |
| Filters clogged not for the first time | 8 | 3 |
| Broken air conditioner reversing valve. Clean or change to a new one | 8 | 4 |
Indoor unit errors
Air conditioner error codes Fujitsudisplayed on the display of the indoor unit
| Fujitsu air conditioner error code | Fujitsu air conditioner error code decoding |
| 00 | There is no communication between the remote control and the outdoor unit |
| 01 | No communication between indoor unit and outdoor unit |
| 02 | The temperature sensor inside the room is broken |
| 03 | Short circuit of the temperature sensor inside the room |
| 04 | The function of the temperature sensor of the external heat exchanger is broken |
| 05 | Short circuit on the temperature sensor of the internal heat exchanger |
| 06 | Failure of the temperature sensor on the heat exchanger |
| 08 | Power supply interrupted |
| 0A | Outdoor temperature sensor failure |
Those who themselves could not figure out the error codes of the Fujitsu air conditioner should contact the service center.
