| Alarm Code | H05, H15, H25 |
|---|
| Alarm meaning |
Compressor 1 discharge temperature sensor disconnected; Compressor 2 discharge temperature sensor disconnected; Compressor 3 discharge temperature sensor disconnected |
| Alarm conditions |
- This alarm occurs when the discharge sensor temperature detector is not inserted into the tube’s sensor holder, or when the sensor itself has suffered some kind of malfunction other than a cut wire.
- When outdoor air temperature is 4°C or higher: Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2°C when the compressor has operated for 10 minutes immediately after start.
- When outdoor air temperature is below 4°C: Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2°C when the compressor has operated for 30 minutes immediately after start.
|
| Probable cause |
- Discharge sensor temperature detector is not inserted into the tube’s sensor holder.
- Discharge sensor itself has suffered some kind of malfunction other than a cut wire.
|
| Check |
- Check that the discharge temperature sensor is inserted into the sensor holder.
- Check that sufficient heat-conducting putty is applied.
- Remove the discharge sensor from the sensor holder and expose the sensor to the outside air for approximately 5 minutes. Check that the temperature detected by the sensor changes to match the outside air temperature. (However the sensor cannot detect temperatures at or below 0 °C.)
|
| Correction |
- Install the sensor into the holder, and apply sufficient heat-conducting putty.
- If the sensor is malfunctioning, replace it.
|
| Example |
– |
| Notes |
The discharge temperature sensor is generally a sensor intended for accurate detection of high temperatures. Therefore, it will not accurately detect the temperature if the temperature at the measurement point is 20 °C or below. |
