HumanTechnik lisa Bedienungsanleitung Seite 54

Additional instructions for the RF smoke alarm transmit-
ter MC (Multichannel transmitter A-2434-0)
Operating principle
In cases of fire, the »RF smoke detector MC« transmitts an alarm
signal (868,35 MHz) to all RF-lisa receivers within transmission ran-
ge, regardless of any set channels. It does not feature a channel
selector.
Test function and Battery depletion indicator
See page 52 / 53
test button
battery depletion indicator
54