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10.3
System fault-finding process
10.3.1 Initial checks
10.3.2 Diagnostic tool
48
Siemens Building Technologies
Fire Safety & Security Products
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).
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.
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.
10.2008
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