Maintenance and fault finding
Block Up Converter Systems 6700/6900 series User Guide 107
Finding faults in the redundancy controller
To check for faults in the redundancy controller:
1 In a BUC system, check the voltage between the centre
pin and body of the Tx IF Output 1 and Tx IF
Output 2 connectors.
1 If 36 to 60 V DC is not present, check the fuses.
If the fuses have not blown, the power supply inside the
redundancy controller is faulty. Contact your Codan
representative for assistance.
Disconnecting a faulty BUC
If you determine that a BUC is faulty and you cannot rectify
the fault, you may need to remove the faulty BUC from the
system so that it can be repaired.
To remove a faulty BUC while maintaining a communication
path:
1 Disconnect the cable from the BUC 1 Control or
BUC 2 Control connector on the redundancy
controller, as required.
1 If you are removing an externally-powered BUC from
the system, switch off the power supply to the BUC.
1 Disconnect the cable from the Tx IF Output 1 or Tx IF
Output 2 connector on the redundancy controller, as
required.
This will not interrupt traffic. The redundancy controller
will continue to run the on-line BUC.
1 Disconnect any unused cables from the redundancy
controller and fit the supplied dust caps.
WARNING Do not short circuit the outputs.
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