User Manual

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User Manual
5. First of all, refer to external alarm troubleshooting in order to understand
whether the alarm can depend on any external equipment failure or not.
6. In case external alarm troubleshooting has not revealed any failure, clean
the optical adapters
7. If the problem still persists, refer to the fibre optic DL troubleshooting to
check if optical cables or optical connections have any problem on DL path.
8. If previous actions didn’t make the LED switch off replace the unit with a
new one or contact for assistance.
External-alarm troubleshooting
(The following procedure is summarized by the flow-chart in fig. 3.34b)
This procedure needs to be considered if at least one external alarm terminal
is connected to some external equipment (see section “external alarms”). If
not, return to main troubleshooting procedure.
These steps aim to detect any failure inside the external equipment or inside
the external alarm terminal. If the external alarm terminals don’t reveal any
equipment malfunction or any terminal failure, return to the main
troubleshooting procedure.
For any external alarm terminal connected to some external equipment,
follow these steps:
4. Disconnect it, and check the TFAx LED status after the disconnection.
5. If the red LED has switched off, external equipment connected to the
alarm terminal should be faulty. Please test it.
6. If the TFAx red LED still remains on after the disconnection, measure the
voltage between the poles of the alarm terminal.
c. If the poles of the alarm terminal are electrically closed, the circuit
board should have any problem. Contact the manufacturer for
assistance.
d. If the poles of the alarm terminal are open, this means neither the
analysis of this alarm terminal nor the one of its external
equipment has revealed any failure. Re-connect this alarm terminal
to its external equipment. In case the TFAx has another alarm
terminal connected to some external equipment and still to be
checked, apply the whole procedure (i.e,, the steps 1-3) to this still
unchecked terminal.
Fibre optic DL troubleshooting
(The following procedure is summarized by the flow-chart in fig. 3.34c)
1. Check if there is any point where fibre experiences a short radius of
curvature. In this case, rearrange the optical path in order to avoid
sharp bends (if necessary, replace the optical cable with a longer one). If
TFLN red LED switches off, troubleshooting has been successfully carried
out. Otherwise, follow next steps.
2. Check if SC-APC connectors are properly installed at both fibre ends. In
case they are not, fix better SC-SPC connectors to adapters. If TFLN red
LED switches off, troubleshooting has been successful. Otherwise, follow
next steps.
3. Disconnect the optical fibre and clean it better at both ends then clean
the SC-APC ports on both the TFLN and the remote unit. Re-connect the
TFAx
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