Nibe VVM 500 - Page 62

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External switch for changing the room heating activated.
႑
Check any external switches.
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Air in the climate system.
႑
Vent the climate system
႑
Closed valves to the climate system.
႑
Open the valves.
High room temperature
႑
Too high set value on the automatic heating control.
႑
Enter menu 1.1 (temperature) and adjust the heat curve offset
downwards. If the room temperature is only high in cold weather the
curve slope in menu 1.9.1 (heating curve) needs to be adjusted down.
႑
External switch for changing the room heating activated.
႑
Check any external switches.
Low system pressure
႑
Not enough water in the climate system.
႑
Top up the water in the climate system.
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 reset.
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.
NIBE™ VVM 500Chapter 4 | Disturbances in comfort60