Andrew ION-B Series, User Manual

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85 MN024-010
TFAM
Case R2
As shown in the previous table, the same red LED switches on to reveal any major failure.
Following the troubleshooting procedure reported hereinafter it is possible to better
understand what problem occurred.
Quick troubleshooting procedure
(The following procedure is summarized by the fl ow-chart in fi g. 3.5.7a)
In case the red LED is ON, please follow these steps:
1. First of all, clean the optical adapters
2. If the problem still persists, refer to the fi bre optic DL troubleshooting to check if optical
cables or optical connections have any problem on DL path.
3. If previous actions didn’t make the LED switch off replace the unit with a new one or
contact for assistance.
Dry-contact troubleshooting
(The following procedure is summarized by the fl ow-chart in Fig. 3.5.7b)
This procedure should be considered if at least one TFAx dry-contact is connected to any
external equipment. If not, return to main troubleshooting procedure.
These steps aim to detect any failure inside external equipment or dry-contact ports. If the dry-
contacts aren’t able to reveal any equipment malfunctions or port failures, then return to the
main troubleshooting procedure.
For any dry-contact that is connected to external equipment, follow these steps:
1. Disconnect it, and check the TFAx LED status after the disconnection.
2. If the red LED has switched off, any external equipment that is connected to the dry
contact port is probably faulty. Please test it.
3. If the TFAx red LED still remains on after the disconnection, measure the voltage between
the terminals of the dry contact port.
a. If the terminals are electrically closed, the dry-contact port is faulty. Contact the
manufacturer for assistance.
b. If the terminals are open, this means neither the analysis of the present dry
contact nor the one of its external equipment has revealed failures. Re-connect
the present dry contact port to its external equipment. If the TFAx has any other
unchecked dry-contacts connected to external equipment, apply the whole
procedure (i.e. steps 1-3) to this new port
Fibre optic DL troubleshooting
(The following procedure is summarized by the fl ow-chart in fi g. 3.5.7c)
1. Check if there is any point where fi bre experiences a short radius of curvature. In this