Mark FS01 Bedienungsanleitung Seite 14

(3)Once sensor was triggered, it will need a couple
of seconds to recover before it could be
triggered again.
Troubleshooting
Problem
The transmitter
does not work
(no red light
when triggered).
The receiver does
not respond to
the transmitter.
The receiver only
lights but NO sound
Cause
The battery is
not properly
installed.
The battery
power is low.
Unsuccessful
pairing.
Mute mode
is ON.
13
Solution
Take out the battery
and install it again.
Make sure the
contacts are good.
Replace with new
battery.
Pair the transmitter
and receiver again.
Check if the receiver
has sound and light
itself.If so,re-pairing
the transmitter and
receiver.