Doc. CEI12166
Rev. 1
Pag. 39 Of 47
. If the fault is on the board C + O1, and the second board is available, set the second board at the place
of the first one: CBA1000 can be operated in three phase Open mode, until the replacement board is
available.
If the fault is not recovered by the replacement board, the test set needs to be returned.
3.4.5 A breaker contact is not detected
First of all, verify that LED’s are red; then, short-circuit each pair, and verify that the corresponding
LED turns green.
If some CB input does not behave correctly, verify that on that socket pair there is a voltage of about 24
V DC, between the central black socket and the socket to be tested.
If this is not true, the fault is located in the INTE board (62), PWA11429: remove it, by unscrewing the
five screws to the L-shaped support, and replace it with the new one. In the meanwhile, you can
continue operating with CBA1000, selecting ALL CB inputs, and performing the tests one chamber at a
time, avoiding to connect to non operational inputs.
If the recording is correct and the LED does not turn on, then there is a faulty LED: for the repair, the
test set needs to be returned.
If there is a doubt about the timing metered by CBA1000, please press the Set pushbutton, and select
the default setting: this avoids that some exotic timing is the cause of the problem.
3.4.6 An auxiliary contact is not detected
First of all, verify that LED’s are red; then, short-circuit each pair, and verify that the corresponding
LED turns green.
If some auxiliary input does not behave correctly, verify that on that socket pair there is a voltage of
about 14 V DC, between the central black socket and the socket to be tested.
If this is not true, the fault is located in the INTE board (62), PWA11429: remove it, by unscrewing the
five screws to the L-shaped support, and replace it with the new one. In the meanwhile, you can
continue operating with CBA1000, using other auxiliary contacts.
If the recording is correct and the LED does not turn on, then there is a faulty LED: for the repair, the
test set needs to be returned.
If there is a doubt about the timing metered by CBA1000, please press the Set pushbutton, and select
the default setting: this avoids that some exotic timing is the cause of the problem.
