Problems
Probable causes
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.
Clicking in the central
The central heating pipe
heating pipes
clamps are too tight.
There is air in the heating
pipes.
The water is circulating too
quickly in the central heat
ing system.
Significant water leak
The pipes on the heat
underneath or in the
pump or the central heat
vicinity of the heat
ing are damaged.
pump.
7682822 - v03 - 27082018
Corrections
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.
Slightly loosen the clamps.
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.
Contact the professional responsible for maintenance of the heat pump.
Contact the professional responsible for maintenance of the heat pump.
7 Troubleshooting
MIV-4S V200
29