Troubleshooting; Resolving Operating Errors; Fault Finding - DeDietrich ALEZIO S User Manual

7 Troubleshooting

7 Troubleshooting
7.1

Resolving operating errors

7.2

Fault finding

Tab.26
Problems Probable causes
The radiators are cold. The heating set point tem­
perature is too low.
The heating mode is deac­
tivated.
The radiator valves are
closed.
The heat pump is not op­
erating.
The water pressure is too
low (< 1 bar).
There is no domestic The domestic hot water
hot water. set point temperature is
too low.
The domestic hot water
mode is deactivated.
The appliance is in re­
duced domestic hot water
mode
The shower head is re­
stricting the water flow.
The heat pump is not op­
erating.
The water pressure is too
low (< 1 bar).
Significant variations in Insufficient water supply
domestic hot water
temperature
The domestic hot water
hysteresis is too high
34 AWHP MIV-S
If your appliance malfunctions, a message containing an error code is
displayed on the main screen of the control panel. This error code is
important for the correct and rapid diagnosis of the type of malfunction and
for any technical assistance that may be needed.
There are 3 error types.
Tab.25
Error type
Error
Fault
Alarm
Warning
Only qualified professionals are authorized to carry out
maintenance and repair work.
1. Make a note of the code displayed on the screen.
2. Remedy the problem described by the error code.
3. Switch the heat pump off and back on to check that the cause of the
error has been removed.
4. If the code is displayed again, contact the technical support.
Corrections
Increase the value of the room temperature set point or, if a room ther­
mostat is connected, increase the temperature on it.
Activate the heating mode.
Open the valves on all radiators connected to the heating system.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
Top up the system with water.
Increase the domestic hot water set point temperature.
Activate the domestic hot water mode.
Check and modify the comfort and reduced time ranges for the domes­
tic hot water.
Adapt the domestic hot water set point temperature.
Clean the shower head; replace it if necessary.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
Top up the installation with water.
Check the water pressure in the installation.
Open the valve.
Contact the professional responsible for maintenance of the heat pump.
Code format
Hxx.xx
Exx.xx
Axx.xx
7748711 - v03 - 08062020