Problems
Probable causes
Corrections
The heat pump does
not work.
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 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.
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 Troubleshooting
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MIV-4S V200
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