ABUS FU2938 Compact Alerting - Manual (Page 20)

20
Troubleshooting
LED display
Meaning
Solution
LEDs flash
alternately once a
second Normal operating
mode
LED 1 flashes once a
second Tamper, one or both
tamper contacts
open Check the installation
LED 2 flashes once a
second No operating
voltage connected Check the wiring and the
functioning of the operating
voltage supply
The red LED 3 on
the main board does
not light. 1) Battery defective
2) No battery
connected
1) Check the battery voltage
and the battery connection
The red LED 4 on
the main board does
not light. 1) Battery not
charged
2) Battery charged.
1) Check the operating
voltage (13.5V)
2) Check the battery
voltage.