7 Troubleshooting
7.1
Resolving operating errors
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.
7.1.1
Types of error code
The control panel can display three types of error codes:
Type of code
Code format
Colour of the status LED
Colour of the error icon
Warning
Axx.xx
Green flashing
Blue
Blockage
Hxx.xx
Continuous red
Yellow
Lock out
Exx.xx
Red flashing
Red
7.2
Fault finding
Problems
Probable causes
Corrections
The radiators are cold. The heating set point tem
perature is too low.
Increase the value of the room temperature set point or, if a room ther
mostat is connected, 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 domestic hot water set point 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 set point 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.
7 Troubleshooting
28
MIV-4S V200
7682822 - v03 - 27082018
