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Measures in event of faults
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D000011142 en k – E65C CU-B1, B2, B4 – User Manual
6
Measures in event of faults
6.1
Removing the communication unit CU-Bx
Precautions at removal of communication unit
The connecting conductors and the meter must not be connected to the
supply during removal of the communication unit CU-Bx. Contact with live
parts is dangerous to life. Remove the corresponding fuses and keep them
in a safe place until completing the work, so that other persons cannot re-
place them unnoticed.
Open the voltage connections in the test terminal block (e.g. TVS14). For
this purpose release the screw of the relevant jumper with an insulated
screwdriver, move the jumper away from the terminal on the voltage trans-
former side and then retighten the screw.
If no test terminal block is present, the primary voltage must be interrupted,
i.e. the system switched off.
Remove the communication unit CU-Bx from the meter as follows:
1.
Check with a phase tester or universal measuring set whether the con-
necting conductors of the meter are voltage-free. If not, remove the
corresponding fuses and keep them in a safe place until installation is
completed to prevent other persons replacing them unnoticed.
2.
Remove the company seals on the front door and terminal cover.
3.
Remove the terminal cover and open the front door.
4.
Remove the communication unit CU-Bx from the meter by pulling on
the flap at the left top side.
6.2
Repairing the communication unit CU-Bx
Communication units CU-Bx must only be repaired by the responsible ser-
vice and repair centre (or manufacturer).
Adopt the following procedure if the CU-Bx needs to be repaired:
1.
If installed, remove the communication unit CU-Bx as described in
section 6.1 and fit a replacement communication unit CU-Bx if nec-
essary.
Meter operation only with communication unit or dummy
For safety reasons the meter must not be operated without communication
unit or a "dummy" communication unit.
If no spare communication unit is available, a "dummy" unit must be used
2.
Describe the error found as exactly as possible and state the name
and telephone number of the person responsible in case of inquiries.
3.
Pack the communication unit CU-Bx to ensure it can suffer no further
damage during transport. Preferably use the original packing if
available. Do not enclose any loose components.
4.
Send the CU-Bx to the responsible service and repair centre.
