8.3 Troubleshooting
Problems
Probable causes
Corrections
The radiators are cold. The heating set point tem
perature is too low.
Increase the value of parameter or, if a room thermostat is connec
ted, increase the temperature on it.
The heating mode is deac
tivated.
Activate the heating mode.
The radiator valves are
closed.
Open the valves on all radiators connected to the heating system.
The heat pump is not op
erating.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
The water pressure is too
low (< 1 bar).
Top up the system with water.
There is no domestic
hot water.
The domestic hot water
set point temperature is
too low.
Increase the value of parameter
.
The domestic hot water
mode is deactivated.
Activate the domestic hot water mode.
The appliance is in re
duced domestic hot water
mode
Check and modify the comfort and reduced time ranges for the domes
tic hot water.
Adapt the domestic hot water temperature set point.
The shower head is re
stricting the water flow.
Clean the shower head; replace it if necessary.
The heat pump is not op
erating.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
The water pressure is too
low (< 1 bar).
Top up the installation with water.
Significant variations in
domestic hot water
temperature
Insufficient water supply
Check the water pressure in the installation.
Open the valve.
The domestic hot water
hysteresis is too high
Contact the professional responsible for maintenance of the heat pump.
The heat pump does
not work.
The heating set point tem
perature is too low.
Increase the value of parameter or, if a room thermostat is connec
ted, increase the temperature on it.
The heat pump is not op
erating.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
The water pressure is too
low (< 1 bar).
Top up the system with water.
An error code appears on
the display.
Correct the error if possible.
The heat pump runs
short-cycling in do
mestic hot water mode
The temperature set point
is too low
Increase the set point
The water pressure is
too low (< 1 bar).
Not enough water in the
installation.
Top up the system with water.
Water leak.
Contact the professional responsible for maintenance of the heat pump.
Clicking in the central
heating pipes
.
The central heating pipe
clamps are too tight.
Slightly loosen the clamps.
There is air in the heating
pipes.
Vent any air in the domestic hot water tank, the pipes and the taps to
prevent the annoying noises likely to be produced during heating or
when drawing off water.
The water is circulating too
quickly in the central heat
ing system.
Contact the professional responsible for maintenance of the heat pump.
8 Troubleshooting
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