User's Manual

ION-B User Manual

TFAM

Case B

As shown in the previous table, the same red LED switches on to reveal any major failures. By

following the next troubleshooting procedure, it will be possible to better understand what

problem occurred.

Quick troubleshooting procedure

(The following procedure is summarized by the ﬂ ow-chart in Fig. 3.3.14a)

If the red LED is LIT, please follow these steps:

1. Refer to dry-contact troubleshooting in order to discover whether or not the alarm is a

result of external equipment failure.

2. If dry-contact troubleshooting has not revealed any failures, clean the optical adapters.

3. If the problem still persists, refer to the ﬁ bre optic DL troubleshooting procedures to see if

the optical cables or connections have any problems along the DL path.

4. If none of the previous actions served to switch off the LED, 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. 3.3.14b)

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