Nibe VVM 225 User Manual page 82

Low system pressure
• Not enough water in the climate system.
– Fill the climate system with water and check for leaks. In event of
repeated filling, contact the installer.
The air/water heat pump's compressor does not start
• There is no heating or cooling demand (accessory is required for cool-
ing).
– VVM 225 does not call on heating, cooling or hot water.
• Compressor blocked due to the temperature conditions.
– Wait until the temperature is within the product's working range.
• Minimum time between compressor starts has not been reached.
– Wait for at least 30 minutes and then check if the compressor has
started.
• Alarm tripped.
– VVM 225 temporarily blocked, see menu 3.2 "Compressor informa-
tion".
82 Chapter 4 | Disturbances in comfort NIBE VVM 225