The content of the article:
Indication errors
Error codes of Fujitsu air conditioners, displayed using the color display of the outdoor unit.
| Fujitsu Air Conditioner Errors | Diode red (number of flashes) | Green diode (number of flashes) |
| No communication between indoor and outdoor modules | – | 2 |
| Failure to connect the wiring to the outdoor fan | – | 3 |
| Temperature sensor not connected | – | 4 |
| Disrupted power | – | 5 |
| No connection between indoor unit and remote control | – | 8 |
| Short circuit on the external temperature sensor | 2 | 2 |
| Short circuit on the humidity sensor inside the device | 5 | 3 |
| Mains resistance in the sensor area | 3 | 2 |
| No condensate drain, clogged tube | 3 | 3 |
| The temperature sensor function is impaired (moisture, dust or dirt has entered) | 3 | 4 |
| The compressor is disabled by the sensor due to a threshold temperature. Check current supply | 3 | 8 |
| Short circuit wiring, air conditioning turned off automatically | 4 | 2 |
| The function of the main relay is broken | 4 | 3 |
| Disrupted electrical current. With such an error air conditioner Fujitsu remove the batteries from the remote control, turn off the power to the indoor and outdoor units, leave them at least five minutes and try to turn them on. | 4 | 4 |
| Overvoltage protection turned on | 4 | 7 |
| No mains power, possibly a power outlet | 4 | 8 |
| Low voltage in the mains | 5 | 2 |
| Low voltage in the mains | 5 | 3 |
| Automatic compressor shutdown in case of overheating | 5 | 5 |
| No power to the outdoor fan | 5 | 6 |
| Fan short circuit | 6 | 2 |
| The indoor fan rotates slowly. Possible reason: lack of lubrication, broken motor bearing, motor itself is broken, fan is clogged | 6 | 3 |
| Refrigerant shortage causing an increase in discharge temperature | 7 | 2 |
| Extremely high refrigerant pressure, unit overheated. With such an error, the Fujitsu air conditioner should check the copper tubes, they may be kinked | 7 | 3 |
| Pressure sensor broken | 7 | 5 |
| Air conditioner filters clogged | 8 | 2 |
| Not clogged filters for the first time | 8 | 3 |
| Damage to the reversing valve of the air conditioner. Clean or change to a new one | 8 | 4 |
Indoor unit errors
Air Conditioner Error Codes Fujitsudisplayed on the indoor unit display
| Fujitsu Air Conditioner Error Code | Decoding of the error code of the air conditioner Fujitsu |
| 00 | There is no connection between the remote control and the outdoor unit |
| 01 | There is no communication between the indoor unit and the 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 impaired |
| 05 | Short circuit on the temperature sensor of the internal heat exchanger |
| 06 | Heat exchanger temperature sensor malfunction |
| 08 | Disrupted power |
| 0A | Outside temperature sensor failure |
Those who could not figure out the error codes of the Fujitsu air conditioner themselves should contact a service center.
