Problems
Probable causes
Corrections
There is no domestic
hot water.
The domestic hot water
setpoint temperature is too
low.
Increase the domestic hot water setpoint temperature.
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 setpoint temperature.
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 setpoint tem
perature is too low.
Increase the value of the room temperature setpoint or, if a room unit is
connected, 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 setpoint
is too low
Increase the setpoint
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.
Significant water leak
underneath or in the
vicinity of the heat
pump.
The pipes on the heat
pump or the central heat
ing are damaged.
Contact the professional responsible for maintenance of the heat pump.
7 Decommissioning and disposal
7.1
Decommissioning procedure
To decommission the heat pump temporarily or permanently:
1. Contact the installer.
7 Decommissioning and disposal
28
MIT-S
7684505 - v04 - 10022022
