႑
External switch for changing the room heating activ-
ated.
႑
Check any external switches.
Low system pressure
႑
Not enough water in the climate system.
႑
Fill the climate system with water and check for
leaks (see page 29).
The compressor does not start
႑
There is no heating requirement.
႑
The indoor module does not call on heating nor
hot water.
႑
Temperature conditions tripped.
႑
Wait until the temperature condition has been re-
set.
႑
Minimum time between compressor starts has not
been reached.
႑
Wait 30 minutes and check if the compressor has
started.
႑
Alarm tripped.
႑
Follow the display instructions.
59Chapter 10 | Disturbances in comfortNIBE™ VVM 310
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