| Alarm Code | F07, F4 |
|---|
| Alarm meaning |
Liquid temperature sensor trouble at outdoor heat exchanger 1; Liquid temperature sensor trouble at outdoor heat exchanger 2. |
| Alarm conditions |
- A/D step is 10 steps or less (short circuit).
- A/D step is 1014 steps or more (open circuit).
|
| Probable cause |
- Sensor malfunction (including connector)
- PCB malfunction
|
| Check |
- Measure the sensor resistance. Check that the sensor is operating normally.
- Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer.
|
| Correction |
– |
| Example |
– |
| Notes |
– |
