e1249d4
88
Fire & Security Products
Siemens Building Technologies Group
01.1999
Possible fault
Remedy
1. From the fault message Line section in collective
mode ascertain which lines are faulty.
2. At the terminal, select Poll function unit information
and check the number of addresses forwards/back-
wards, or connect logger and reconfigure D-Bus,
Check chain forwards/backwards
If more precise details required:
1. Connect logger, reconfigure D-Bus
2. Compare logger printout with the configuration of the
detector types
Line unit in collective
mode AND
Detector
(multiple faults)
1. Detector missing
2. Open line
3. Hard short
4. ASIC Startup problem
- Only possible after startup of a
line or after inserting a new de-
vice
- No Trouble message relating
to line short circuit or open line
Too many detectors on
the line
1. Number of configured devices does
not agree with those installed
2. FET problem
3. creeping line break
If fault remedied: Startup
problem on ASIC
Creeping line break (line
resist. too high and not
constant)
forwards <> backw. <> 0
Forwards > Configuration
Missing detector OR
creeping line break.
Forwards < Configuration
Backwards = Config.
Disconnect forward line,
reconfigure D-Bus, wait
2 minutes
Forwards = Config. –1,
but all detectors installed
Obtain more precise de-
tails from the message
Detector fault
FET problem
Loop lineStub line
Displayed on LCD
Reconfigure D-Bus, wait 2
minutes, repeat process if
necessary
1. At the terminal, select
Poll function unit infor-
mation and check the
number of addresses
forwards/backwards,
or connect logger
and reconfigure D-Bus
Check chain for-
wards / backwards
2. Check line after each
device with a multime-
ter
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