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Fig.52
9.3
Fault finding
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
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 heat pump runs
The temperature set point
short-cycling in do
is too low
mestic hot water mode
The water pressure is
Not enough water in the
too low (< 1 bar).
installation.
Water leak.
7611444 - v06 - 04032019
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 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.
Increase the value of the room temperature set point or, if a room ther
mostat is connected, 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.
Increase the set point
Top up the system with water.
Contact the professional responsible for maintenance of the heat pump.
9 Troubleshooting
key. Press the
key.
key.
55
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Table of Contents
Troubleshooting
