See the "Saving tips" section for more detailed information about
how to best set the thermostats.
• VVM 225 in incorrect operating mode.
– Enter menu 4.2. If mode "auto" is selected, select a higher value on
"stop heating" in menu 4.9.2.
– If mode "manual" is selected, select "heating". If this is not enough,
select "addition".
• Too low set value on the automatic heating control.
– Enter menu 1.1 "temperature" and adjust the offset heating curve
up. If the room temperature is only low in cold weather the curve
slope in menu 1.9.1 "heating curve" needs adjusting up.
• Too low or no operating prioritisation of heat.
– Enter menu 4.9.1 and increase the time for when heating is to be
prioritised. Note that if the time for heating is increased the time for
hot water production is reduced, which can give smaller amounts of
hot water.
• "Holiday mode" activated in menu 4.7.
– Enter menu 4.7 and select "Off".
• External switch for changing room temperature activated.
– Check any external switches.
• Air in the climate system.
– Vent the climate system.
• Closed valves to the climate system.
Closed valves to the climate system or heat pump.
– Open the valves (contact your installer for assistance in finding them).
High room temperature
• Too high set value on the automatic heating control.
– Enter menu 1.1 (temperature) and reduce the offset heating curve.
If the room temperature is only high in cold weather the curve slope
in menu 1.9.1 "heating curve" needs adjusting down.
• External switch for changing room temperature activated.
– Check any external switches.
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Chapter 4 | Disturbances in comfort
NIBE VVM 225
