Meaning of the Status LED

lights up green

A radio link to the transmitter is established. The accupack of the received transmitter is sufficiently charged.
flashes green

The PAIR button has been short-pressed. Paired devices are being identified.
flashes alternately green and red

The PAIR button has been long-pressed. The receiver establishes a radio link to a transmitter whose PAIR button has also been long-pressed.
lights up yellow

The received transmitter has been muted with the MUTE switch. In addition, Muted is displayed on the display panel.
flashes yellow

The firmware is being updated.
lights up red

No radio link to a transmitter. In addition, the background of the display panel changes back and forth between light and dark and No Link appears on the display panel.
flashes red

The accupack capacity of the received transmitter is only sufficient for max. 30 minutes of operation.