W DOC AIRBUS | TSM A320F

Failure of the Connection between the EGIU2 and the APU Generator Line Contactor (GLC)

TASK 24-22-00-810-813-A
Failure of the Connection between the EGIU2 and the APU Generator Line Contactor (GLC)

1. Possible Causes
  • C/B-APU GEN/EGIU2/115VAC [23XS]
  • wiring
  • EGIU-2 [22XU2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-00-00-810-803-A
Circuit Breaker Tripped and/or C/B TRIPPED Warning
AMM 24-22-33-000-001
Removal of the EGIU-1(2)
AMM 24-22-33-400-002
Installation of the EGIU-1(2)
ASM 242301
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 31-60-00-860-001
EIS Start Procedure
3. Fault Confirmation
Subtask 24-22-00-860-062-A ** ON A/C NOT FOR ALL
A. Job Set-up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits from the APU 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.
Subtask 24-22-00-710-065-A ** ON A/C NOT FOR ALL
B. Test
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key to get the ELEC page.
On the lower ECAM display unit:
  • in the APU GEN box, the electrical parameters come into view as follows:
    . normal AC load,
    . no voltage,
    . no frequency.
4. Fault Isolation
Subtask 24-22-00-810-062-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • Do a check of the status of the circuit breaker APU GEN/EGIU2/115VAC (23XS).
   (1) If the circuit breaker is open:
     (a) If the fault continues:
  • Replace the C/B-APU GEN/EGIU2/115VAC [23XS] .
   (2) If the circuit breaker is closed:
  • Do a check of the wiring between:
    . the circuit breaker (23XS) and the pin A/D of the APU GLC (3XS)
    . the circuit breaker (23XS) and the pin AB/1D of the EGIU2 (22XU2) ASM 242301.
     (a) If the wiring is not correct:
  • Repair the wiring .
     (b) If the wiring is correct:
Subtask 24-22-00-810-062-B ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • Do a check of the status of the circuit breaker APU GEN/EGIU2/115VAC (23XS).
   (1) If the circuit breaker is open:
     (a) If the fault continues:
  • Replace the C/B-APU GEN/EGIU2/115VAC [23XS] .
   (2) If the circuit breaker is closed:
  • Do a check of the wiring between :
    . the circuit breaker (23XS) and the pin 9 of the APU/EXT contactor module (29XN)
    . the circuit breaker (23XS) and the pin AB/1D of the EGIU2 (22XU2) ASM 242301.
     (a) If the wiring is not correct:
  • Repair the wiring .
     (b) If the wiring is correct:
Subtask 24-22-00-710-066-A ** ON A/C NOT FOR ALL
B. Do this test to make sure that the systems operates correctly:
ACTION
RESULT
On the ECAM control panel:
  • push the ELEC key to get the ELEC page.
On the lower ECAM display unit:
  • the ELEC page comes into view.
    In the APU GEN box:
  • the normal electrical parameters come into view.
5. Close-up
Subtask 24-22-00-860-063-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
   (2) De-energize the electrical circuits supplied from the APU AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:26:35 UTC
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