11.1 Troubleshooting
If there are no special alerts on the display, perform the following basic actions:
- Check all switches.
- Check the fuses of the building and the heat pump.
- Check the residual current device.
| Problem | Possible cause | Corrective action |
|---|---|---|
| Low room temperature | The heat pump is in the wrong operating mode | Set the heat pump’s heating functions to the correct operating mode. |
| Thermostats closed on the radiators or underfloor heating | Open the thermostats in as many rooms as possible. | |
| Adjust the room temperature in the Setpoint room menu instead of closing the thermostats. | ||
| The automation setpoint is too low | Increase the comfort setpoint in the Setpoint room menu. | |
| Increase the gradient of the heating curve by changing the values of the Y points in the Heating curve menu. | ||
| Set the maximum setpoint for supply water to a sufficiently high value in the Set value output water temp. menu. | ||
| The heating circuit’s time programme is on | Go to the Time programme heating circuit menu and adjust the time programme. | |
| Air in the heating system | Remove the air from the heating system. | |
| Closed valves between the accumulator and the heat supply network | Open the valves. | |
| Activated an external contact for decreasing the room temperature | Check any external contacts. | |
| High room temperature | The setpoints for the heating circuits are too high | If the room temperature is only too high during cold weather, decrease the gradient of the heating curve. |
| If the room temperature is too high during mild weather, decrease the comfort setpoint. | ||
| Domestic water is cold | The domestic hot water function is not active | Set the correct value for the Domestic water operating mode setting. |
| Domestic hot water consumption too high | Wait until the water warms up. When a temporary period of high consumption begins, you may select forced charging of domestic hot water by pressing the domestic hot water button on the user terminal for 3 seconds. | |
| Setpoint too low | Go to Domestic water setpoints and increase the setpoint for domestic water. | |
| Supply mixing valve setting too small | Open the valve. | |
| Compressor does not start up | No need for heat | Check the device’s status information in the Info menu. |
| The minimum compressor stop time is active | Wait 20 minutes and check whether the compressor starts up. | |
| The device has a failure | Check the reason for the failure in the Info menu and take the necessary measures with the help of the troubleshooting table. |