Troubleshooting; Resolving Operating Errors; Types Of Error Code; Fault Finding - DeDietrich ALEZIO S AWHP 4.5 MR User Manual

6 Troubleshooting

6 Troubleshooting
6.1

Resolving operating errors

Tab.21
Type of code
Warning
Blockage
Lock out
6.2

Fault finding

Tab.22
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).
28 AWHP MIV-S
If your appliance malfunctions, the status LED flashes and/or changes
colour and 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.
If an error occurs:
1. Make a note of the code displayed on the screen.
2. Remedy the problem described by the error code or contact the
installer.
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 installer.
6.1.1
The control panel can display three types of error codes:
Code format
Axx.xx
Hxx.xx
Exx.xx
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.

Types of error code

Colour of the status LED
Green flashing
Continuous red
Red flashing
7685690 - v04 - 06042020