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Siemens Building Technologies
Fire Safety & Security Products
10.2008
10.3 System
fault-finding
process
Because of the number of ways you can see a fault of the VIS3I-328, we
recommend that you should always follow a predetermined logical process for
fault-finding.
NOTE
The VIS3I-328 must be powered down before you replace any LRU(s).
10.3.1 Initial
checks
The first checks should confirm that the power supply module and the cooling fan
are operating normally.
Power supply failures
A failure of the power supply module –5 V supply causes an alarm 1028, if this is
enabled by the system configuration. A failure of the +5 V supply causes an
inability to start (no front panel LEDs lit) or in unexpected restarts (shown in the
Alarm & Action Log).
Cooling fan failures
A failure of the cooling fan causes an over-temperature alarm 1028, if the alarm is
enabled (see Tab. 37). If a malfunction due to over temperature is suspected, the
flow of air at the cooling vent holes should be checked.
10.3.2 Diagnostic
tool
The main diagnostic tool for the VIS3I-328 system is the VisiPC software, which
you should install on a PC connected to the Visilynx system. You need a test lead
to interface the PC communication port to the Test/Config port (see chapter 8.2
Connect a PC running VisiPC software). The VisiPC Software is described in its
User Manual.