High or distracting ventilation
႑
The ventilation is not adjusted.
႑
Order ventilation adjustment.
႑
Fan speed in forced mode.
႑
Enter menu 1.2 and select “normal".
႑
External switch for changing the fan speed activated.
႑
Check any external switches.
႑
Filter blocked.
႑
Clean or replace the filter.
Low supply air temperature
႑
Air in the supply air battery
႑
Bleed the supply air battery.
႑
Trim valve too restricted
႑
Contact your installer!
High supply air temperature
႑
Trim valve not sufficiently restricted.
႑
Contact your installer!
The compressor does not start
႑
There is no heating requirement.
႑
The heat pump does not call on heating nor hot water.
႑
The heat pump defrosts.
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™ F470Chapter 4 | Disturbances in comfort72
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