Power on: keep pressed until you hear a beep. After three short beeps,
the device is ready to work
Current working mode: short press, if the speaker is enabled the device
will describe the current working mode.
Power off: keep pressed until all LED start to flash, release then short
press
Self test: keep pressing until all LED start to flash, release then long
press until the LED stops flashing. The device will test the internal
modules. If an error is found the device will start to beep, to stop it short
press the power button. Please contact your local dealer if this happens.