W DOC AIRBUS | TSM A320F

Failure of the Link Between the TR2 Fault Output and the SDAC1 and the SDAC2

TASK 24-30-00-810-811-A
Failure of the Link Between the TR2 Fault Output and the SDAC1 and the SDAC2

1. Possible Causes
  • wiring
  • RELAY-SWTG SPLY/TR 2 FAULT [8PC2]
  • TR-2 [1PU2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-32-00-810-802-A
Failure of the Connection between the TR2 Voltage Output and the SDAC1 and SDAC2
AMM 24-32-51-000-001
Removal of the Transformer Rectifier
AMM 24-32-51-400-001
Installation of the Transformer Rectifier
ASM 243502
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-32-00-860-004
Procedure to Get Access to the SYSTEM REPORT/TEST/ELEC Page
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
3. Fault Confirmation
Subtask 24-30-00-860-057-A
A. Job Set-Up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
     (c) Do the procedure to get access to the SYSTEM REPORT/TEST/ELEC page AMM 31-32-00-860-004.
Subtask 24-30-00-710-068-A
B. Test
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key to get the ELEC page.
On the lower ECAM DU, ELEC page:
  • the line connection between TR2 and DC 2 does not come on.
  • the DC BAT busbar energizes the DC 2 busbar
  • the TR2 indication is shown in amber and the value of the current is 0A.

On the upper ECAM DU:
  • the TR2 FAULT message does not come into view.
2.On the MCDU, on the ELEC page:
  • push the line key adjacent to the TR indication.
On the MCDU:
  • the TR page comes into view.
3.On the MCDU:
  • push the line key adjacent to the TR2 indication.
On the MCDU:
  • the TR2 page comes into view.
4.On the MCDU:
  • push the line key adjacent to the TR2 RESET indication.
On the MCDU, on the TR2 RESET page:
  • if the NO FAULT indication comes into view, and that
  • on the lower ECAM DU, ELEC page, the normal configuration comes into view:
    do the trouble shooting given in Para. 4.A.
  • if the TR2 (1PU2) indication comes into view, refer to (Ref. TSM TASK 24-32-00-810-802) for the trouble shooting. Then, do the trouble shooting given in Para. 4.A.
4. Fault Isolation
Subtask 24-30-00-810-060-B
A. If the test confirms the fault:
  • do a check of the wiring between:
    . the pin B/E of the TR2 and the pin A/X2 of the relay 8PC2,
    . the pin A/X1 of the relay 8PC2 and the first branch point ASM 243502.
   (1) If there is no continuity:
  • repair the wiring.
   (2) If there is continuity:
  • replace the RELAY-SWTG SPLY/TR 2 FAULT [8PC2] .
   (3) If the fault continues:
Subtask 24-30-00-710-069-A
B. Do this test to make sure that the system operates correctly:
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key to get the ELEC page.
On the lower ECAM DU, ELEC page:
  • the normal configuration comes into view.
2.On the AC power center 123VU:
  • open the TR2 circuit breaker (2PU2).
On the lower ECAM DU, ELEC page:
  • the TR2 and its parameters are shown in amber
  • the TR2 does not energize the DC 2 busbar
  • the DC BAT busbar supplies the DC 2 busbar.

On the upper ECAM DU:
  • the TR2 FAULT message comes into view.
3.On the AC power center 123VU:
  • close the TR2 circuit breaker.
4.On the TR2 front face:
  • push the TR2 RESET pushbutton switch.
On the lower ECAM DU, ELEC page:
  • the normal configuration is shown.

On the upper ECAM DU:
  • the TR2 FAULT message goes out of view.
5. Close-up
Subtask 24-30-00-860-058-A
A. Put the aircraft back to its initial configuration.
   (1) Do the EIS stop procedure AMM 31-60-00-860-002.
   (2) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:26:45 UTC
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