List of error codes for the De Dietrich Alezio V220 Evolution air-to-water heat pump
List of error codes for the indoor unit – De Dietrich Alezio V220 Evolution – AWHP-2 MIV-3 V220
Download the manual for the De Dietrich Alezio V220 Evolution – AWHP-2 MIV-3 V220
In the event of a malfunction, the control panel displays the ⚠ symbol along with an error code.
Warning: Write down the code shown on the display. The error code is important for a correct and fast diagnosis of the type of malfunction and for any technical assistance from your installer. To return to the main display, press the ⬅ key. The ⚠ symbol remains on screen as long as the error is present. You can still navigate through all the menus.
| Error code | Description | Probable causes | Check / solution |
|
ERR |
Configuration error | The control mode is not compatible with the installer’s parameter settings. | Check parameters and . |
|
E1 |
Flow sensor fault.
The heat pump shuts down and no control mode is available. |
Poor connection Sensor failure | Check the wiring.
Check that the sensor is working properly by measuring its impedance. Replace the sensor if necessary. |
|
E2 |
Outdoor sensor fault.
The control switches to fallback mode using a default outdoor temperature of -20 °C. |
Poor connection Sensor failure | Check the wiring.
Check that the sensor is working properly by measuring its impedance. Replace the sensor if necessary. |
|
E3 |
Domestic hot water sensor fault.
Domestic hot water production is stopped |
Poor connection Sensor failure | Check the wiring.
Check that the sensor is working properly by measuring its impedance. Replace the sensor if necessary. |
|
E4 |
Flow fault.
The heat pump shuts down and no control mode is possible |
Water pressure is too low
Heating water flow is too low |
Close the isolation valves, then check the water pressure using the pressure gauge. |
| No circulation | Check that the circulator pump is working properly.
Insert a screwdriver into the slot on the circulator pump shaft and turn the shaft back and forth several times. Check the wiring. Check the pump’s power supply. If the pump still does not work, it is faulty and must be replaced. |
||
| Too much air | Fully bleed the indoor module and the system for optimum operation. | ||
| Incorrect pump wiring | Check the electrical connections. | ||
| Flow meter | Check the electrical connections. Replace the flow meter. | ||
| The circuit is dirty. | Check that the filters are not clogged. Clean and flush the system. | ||
| E5 | Outdoor module fault.
The heat pump shuts down; manual forcing of the backup heaters is possible in heating and domestic hot water mode. |
The outdoor module remained powered while the indoor module was powered off. | Turn off both the indoor and outdoor modules for 3 minutes, then turn them back on at the same time.
Refer to the error codes specific to the outdoor module. See Outdoor module maintenance guide. |
| Short cycling of the heat pump | The heat pump’s setpoint offset for domestic hot water production has not been configured. | Set parameter P17
For AWHP 4 MR, AWHP 6 MR-2, set to 5°C. For AWHP 8 MR-2, set to 8°C. For AWHP 11 MR-2, set to 10°C. For AWHP 11 TR-2, set to 10°C. For AWHP 16 MR-2, set to 13°C. For AWHP 16 TR-2, set to 13°C. If the problem persists, increase the parameter value up to 20°C. |
For more information, see Description of parameters, page 91 Sensor specifications, page 22