Troubleshooting - DeDietrich ALEZIO O HYBRID User Manual

Fig.59
8.3

Troubleshooting

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 energy-saving shower
head is restricting the wa­
ter 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 heat pump does The heating set point tem­
not work. perature is too low.
The heat pump is not op­
erating.
The water pressure is too
low (< 1 bar).
An error code appears on
the display.
The water pressure is Not enough water in the
too low (< 1 bar). installation.
Water leak.
7613346 - v05 - 13112018
5. Scroll through the errors by pressing the
opens, the row of the error in the memory appears briefly. The PCB
name appears. Go back to the error list by pressing the
Important
The errors are stored from the most recent to the oldest.
6. Go back to the Er:xxx display by pressing the
key: the CLR parameter flashes after the errors. 000 corresponds to
the PCB selected.
Clear the error memory by pressing the
7. Exit the Malfunctions menu by pressing the
Corrections
Increase the value of parameter
ted, 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 installation with water.
Increase the value of parameter
Activate the domestic hot water mode.
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.
Increase the value of parameter
ted, increase the temperature on it.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
Top up the system with water.
Correct the error if possible.
Top up the system with water.
Contact the installer.
8 Troubleshooting
or key. When this menu


key. Press the
key.

key.
or, if a room thermostat is connec­
.
or, if a room thermostat is connec­
200 ESL HYBRID
key.
53