Security-Center FU2938 Instructions D'installation page 21

Troubleshooting
LED display
LEDs flash
alternately once a
second
LED 1 flashes once a
second
LED 2 flashes once a
second
The red LED 3 on
the main board does
not light.
The red LED 4 on
the main board does
not light.
Meaning
Normal operating
mode
Tamper, one or both
tamper contacts
open
No operating
voltage connected
1) Battery defective
2) No battery
connected
1) Battery not
charged
2) Battery charged.
21
Solution
Check the installation
Check the wiring and the
functioning of the operating
voltage supply
1) Check the battery voltage
and the battery connection
1) Check the operating
voltage (13.5V)
2) Check the battery
voltage.