DeDietrich AWHP 4 MR User Manual page 49

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.
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Corrections
Increase the value of parameter
ted, 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 installer.
Contact the installer.
It is essential that you 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 installer.
Contact the installer.
8 Troubleshooting
or, if a room thermostat is connec­
MIV-4 49