
Faults / Troubleshooting
9
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Building Technologies
A6V10393194_d_en_--
Fire Safety
2018-11-05
9 Faults / Troubleshooting
If a fault cannot be eliminated with the help of the following information, please
contact the service engineer.
Symbol Status LED Description
Possible cause
Measures
OFF
System not operational
●
With a voltage
<DC 20.5 V, batteries
are switched off
automatically
●
Check the mains voltage.
●
Check fuse F1, see
document A6V10411051.
ON
Mains or battery fault
●
Mains voltage
disconnected
●
Battery voltage too low
●
Batteries disconnected
●
Check the mains voltage.
●
Check the battery voltage.
●
Check the cabling.
●
Check fuse F3, see
document A6V10411051.
Status
Possible cause
Measures
No voltage at AUX 1 or AUX 2 The electronic fuse for overload and
short-circuit has switched.
Check the installation and cabling.
The electronic fuse resets automatically after the cause of the switch has been
eliminated.