Zehnder Nova NEO Mode D'emploi page 9

GB
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Filter alarm
The red LED (5) will light up periodically to remind you to clean the airflow
filter at the bottom of the appliance (see section 3.2).
Sensor alarm
The same red LED (5) will blink in the event of a sensor fault. If so, further
action is required: contact your installer or dealer (see section 4).
Lights OFF mode
For your convenience, particularly where the appliance is installed in a
bedroom, all LED warning lights will go out automatically after 10 minutes
with no intervention required on your part.
This mode affects the LEDs only and has no impact on radiator or fan
operation. Press any button to exit this mode and restore normal LED
functioning.
Using your appliance 9