W DOC AIRBUS | TSM A320F

Failure of an Alternating Current Supply (ACS)

TASK 27-90-00-810-801-A
Failure of an Alternating Current Supply (ACS)

1. Possible Causes

2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
F ALTERNATING CURRENT SUPPLY (ACS)
3. Fault Confirmation
Subtask 27-90-00-700-050-A
A. Not applicable, refer to the procedure that you did before.
4. Fault Isolation
Subtask 27-90-00-810-050-A
A. Trouble shooting procedure for an ACS short circuit.
Failure that the computer(s) which receives the ANI signal from the transducers (A, B, C) senses. This failure can be:
  • a short circuit in the winding of one of the transducers
  • or a short circuit in the wiring (ACS).
The procedure that you did before permitted to isolate possible failure causes:
  • in the computer which supplies the transducers (A, B, C)
  • or in the wiring (discontinuity).
NOTE: The computer(s) which supplies the transducers has been removed.
   (1) At the unit A, disconnect the electrical connector related to the ACS.
   (2) Do a check of the resistance and insulation of the LVDT/RVDT of the unit A.
     (a) If the check is correct:
  • connect the electrical connector to the unit A
  • continue the trouble shooting.
     (b) If the check is not correct:
  • replace the unit A or the LVDT/RVDT
  • connect the electrical connector to the unit A
  • refer to the procedure that you did before.
   (3) At the unit B, disconnect the electrical connector related to the ACS.
   (4) Do a check of the resistance and insulation of the LVDT/RVDT of the unit A.
     (a) If the check is correct:
  • connect the electrical connector to the unit B
  • continue the trouble shooting.
     (b) If the check is not correct:
  • replace the unit B or the LVDT/RVDT
  • connect the electrical connector to the unit B
  • refer to the procedure that you did before.
   (5) At the unit C, disconnect the electrical connector related to the ACS.
   (6) Do a check of the resistance and insulation of the LVDT/RVDT of the unit C.
     (a) If the check is correct:
  • connect the electrical connector to the unit C
  • continue, the trouble shooting.
     (b) If the check is not correct:
  • replace the unit C or the LVDT/RVDT
  • connect the electrical connector to the unit C
  • refer to the procedure that you did before.
[Rev.8 from Aug 2018] 2026.04.04 04:39:16 UTC
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