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Siemens Building Technologies
Cerberus Division
09.2000
7.4 Functional check / overhaul
The detector self-test subjects the DLO1191 automatically to an extensive electronic
functional check. Nevertheless it is necessary to physically check the functions on site in
regular intervals by triggering the detector with a suitable test filter (usually once per
year). Detectors that do not respond or which are mechanically damaged must be re-
placed.
If an information or fault signal is transmitted during operation, the status bits in the
EEPROM of the detector can be read out with the service computer. A preliminary diag-
nosis on the cause can be established based on this information.
All detector hoods and reflectors should be cleaned regularly with a soft piece of cloth
which is either dry or soaked with Plexiklar, or a mild soap solution, depending on the en-
vironmental conditions and severity of contamination at the installation site. Do not use
any solvents or steam jets.
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