Zehnder RFZ Manuel page 28

LED indications
Left LED briefly lights up green: the ventilation unit
■
has been set in position 1 or 3.
Right LED briefly lights up green: the ventilation unit
■
has been set in position 2 or temporarily in position
3.
Both LEDs light up red for 1 second: after a number
■
of attempts, the ventilation unit has still not reacted.
Both LEDs light up alternately red: The switch is in
■
the fine-tune mode but the ventilation unit is not.
Fine-tuning is therefore not possible. This alternate
flashing continues for approx. 1 minute.
Both LEDs light up green for 1 second: Tuning is
■
complete.
28 - EN