W DOC AIRBUS | TSM A320F

Failure of the DC Emergency Generation

TASK 24-60-00-810-815-A
Failure of the DC Emergency Generation

1. Possible Causes
  • CNTOR-ESS TR [3PE]
  • wiring
  • C/B-ESS TR/CNTOR/CTL [5PE]
  • TR-ESS [1PE]
  • C/B-ESS TR/SPLY [4PE]
  • CNTOR-AC ESS BUS SWITCHING [15XE]
  • C/B-AC ESS/BUS/EMER/CNTOR/SPLY [15PC]
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
ASM 242402
AMM 24-24-55-000-002
Removal of the AC ESS BUS Contactor
AMM 24-24-55-400-002
Installation of the AC ESS BUS Contactor
ASM 243401
AMM 24-34-51-000-001
Removal of the Essential Transformer Rectifier
AMM 24-34-51-400-001
Installation of the Essential Transformer Rectifier
AMM 24-34-55-000-001
Removal of the Essential TR Contactor
AMM 24-34-55-400-001
Installation of the Essential TR Contactor
ASM 243501
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
AMM 31-60-00-860-002
EIS Stop Procedure
3. Fault Confirmation
Subtask 24-60-00-865-060-A
A. Table of the circuit breakers used in this procedure:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
106VUAC ESS/BUS/EMER/CNTOR/SPLY15PCC08
106VUESS TR/CNTOR/CTL5PEC02
106VUESS TR/SPLY4PEC01
123VUTR1/SPLY2PU1AB10
Subtask 24-60-00-860-074-A
B. 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.
Subtask 24-60-00-710-077-A
C. Test
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key.
On the upper ECAM DU:
  • the warnings below come into view:
    . ELEC TR1 FAULT,
    . ELEC TR2 FAULT,
    . ELEC DC ESS FAULT.
2.In the AC power center 123VU:
  • open the circuit breaker 2PU1.
If, on the lower ECAM DU, on the ELEC page:
  • the line between the AC ESS bus and the ESS TR is green,
  • the ESS TR voltage is 28VDC.

    Do the trouble shooting given in Para. 4.B.

If, on the ELEC page:
  • the line between the AC ESS bus and the ESS TR is green,
  • the ESS TR voltage is OVDC.

    Do the trouble shooting given in Para. 4.C.

If, on the ELEC page:
  • the line between the AC ESS bus and the ESS TR does not appear,
  • the ESS TR voltage is OVDC.

    Do the trouble shooting given in Para. 4.D.
4. Fault Isolation
Subtask 24-60-00-810-066-A
A. If the test confirms the fault:
   (1) If the fault continues:
  • Do a check of the status of the circuit breaker (5PE).
     (a) If the circuit breaker is closed:
  • Do a check and repair the wiring between respectively:
    . the 28VDC output of the ESS TR (1PE) and the pin A/F of the contactor (3PE)
    . the pins A/G and B/3 of the contactor (3PE)
    . the pin B/5 of the contactor (3PE) and the pin B/F of the ESS TR (1PE) ASM 243401
     (b) If the circuit breaker is open:
       1 If the fault continues:
  • Replace the C/B-ESS TR/CNTOR/CTL [5PE] .
Subtask 24-60-00-810-067-A
B. If the test confirms the fault:
   (1) If the fault continues:
  • Do a check of the status of the circuit breaker (4PE).
     (a) If the circuit breaker is closed:
  • Do a check and repair the wiring between the pins L1, L2, L3 of the AC ESS BUS contactor (15XE) and the pins A/A, A/B, A/C of the ESS TR (1PE) ASM 243401.
     (b) If the circuit breaker is open:
       1 If the fault continues:
  • Replace the C/B-ESS TR/SPLY [4PE] .
Subtask 24-60-00-810-068-B
C. If the test confirms the fault:
   (1) If the fault continues:
  • Do a check of the status of the circuit breaker (15PC).
     (a) If the circuit breaker is closed:
  • Do a check and repair the wiring between respectively:
    . the pin K1 of the contactor (15XE) and the pins A/B and B/B of the contactor (3XC)
    * through the contactor (4PC) and the relay (17PC)
    * through the contactors (5PU1) and (5PU2)
    . the pin A/D of the contactor (3XC) and the pin B/K of the contactor (15XE), through the contactors (5PU1, 5PU2, 3PC), the relay (17PC), the contactor (3XC) and through the timer (33XE)
    . the pin B/D of the contactor (3XC) and the first branch point
    . the pin B/L of the contactor (15XE) and the ground through the timer (33XE) ASM 242402 and ASM 243501.
     (b) If the circuit breaker is open:
       1 If the fault continues:
  • Replace the C/B-AC ESS/BUS/EMER/CNTOR/SPLY [15PC] .
Subtask 24-60-00-710-078-A
D. Do this Test:
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key.
On the upper ECAM DU:
  • no message comes into view.
2.In the AC power center 123VU:
  • open the circuit breaker 2PU1.
On the lower ECAM DU, on the ELEC page:
  • the TR 1 no longer supplies the DC 1 bus,
  • the DC 1 bus is supplied by the DC 2 bus through the DC BAT bus,
  • the DC ESS bus is supplied by the AC ESS bus through the ESS TR.
3.In the AC power center 123VU:
  • close the circuit breaker 2PU1.
5. Close-up
Subtask 24-60-00-860-075-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 04:26:59 UTC
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