W DOC AIRBUS | TSM A320F

Loss of the 212XP and 216XP Busbars in Ground Service Configuration

TASK 24-42-00-810-801-A
Loss of the 212XP and 216XP Busbars in Ground Service Configuration

1. Possible Causes
  • wiring
  • C/B-SVCE/BUS 2/212XP SPLY [2XX]
  • CNTOR-AC GND SVCE SPLY [12XX]
  • CNTOR-AC SVCE BUS NORM SPLY [12XN]
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 24-42-00-861-001
Energize the Ground Service Network from the External Power
AMM 24-42-00-862-001
De-energize the Ground Service Network Supplied from the External Power
ASM 244201
AMM 24-42-55-000-001
Removal of the Contactors
AMM 24-42-55-400-001
Installation of the Contactors
AMM 24-51-55-000-001
Removal of the AC Service Bus Normal Supply Contactor
AMM 24-51-55-400-001
Installation of the AC Service Bus Normal Supply Contactor
3. Fault Confirmation
Subtask 24-42-00-860-050-A
A. Job Set-up
   (1) Energize the ground service network with the ground power unit AMM 24-42-00-861-001.
Subtask 24-42-00-710-050-A
B. Test
ACTION
RESULT
1.On the forward attendant panel 120RH, push the CABIN WDO and CABIN CLG pushbutton switches.
  • the ceiling forward and aft lights (L side) do not come on.
  • the window forward and aft lights (R side) do not come on.
4. Fault Isolation
Subtask 24-42-00-810-050-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • Do a check of the status of the circuit breaker (2XX)
   (1) If the circuit breaker is closed:
  • Do a check for 115VAC on the pins A/M, A/L and A/K of the contactor (12XX) ASM 244201.
     (a) If there is no 115VAC:
  • Do a check of the wiring between the circuit breaker (2XX) and the contactor (12XX) ASM 244201.
       1 If there is no continuity:
  • Repair the wiring .
       2 If there is continuity:
  • Replace the C/B-SVCE/BUS 2/212XP SPLY [2XX] .
     (b) If there is 115VAC:
       1 If the fault continues:
  • Do a check of the wiring between pins A/F, A/E and A/D of the contactor (12XX) and the busbars 212XP and 216XP ASM 244201.
         a If the wiring is not correct:
  • Repair the wiring .
         b If the wiring is correct:
       2 If the fault continues:
  • Do a check and repair the wiring :
    . between the pin B/3 of the contactor (12XX) and the pin B/10 of the contactor (12XN)
    . between the pin B/5 of the contactor (12XX) and the first terminal block
    . between the pin B/12 of the contactor (12XN) and the first terminal block ASM 244201.
   (2) If the circuit breaker is open:
     (a) If the fault continues:
  • Replace the C/B-SVCE/BUS 2/212XP SPLY [2XX] .
Subtask 24-42-00-810-050-B ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • Do a check of the status of the circuit breaker (2XX)
   (1) If the circuit breaker is closed:
  • Do a check for 115VAC on the pins 1, 2, 3 of the module 20XX ASM 244201.
     (a) If there is no 115VAC:
  • Do a check of the wiring between the circuit breaker (2XX) and the module 20XX ASM 244201.
       1 If there is no continuity:
  • Repair the wiring.
       2 If there is continuity:
  • Replace the C/B-SVCE/BUS 2/212XP SPLY [2XX] .
     (b) If there is 115VAC:
       1 If the fault continues:
  • Do a check of the wiring between pins 4, 6 and 8 of the module 20XX and the busbars 212XP and 216XP ASM 244201.
         a If the wiring is not correct:
  • Repair the wiring .
         b If the wiring is correct:
       2 If the fault continues:
  • Do a check and repair the wiring :
    . between the pin B/3 of the contactor (12XX) and the pin B/10 of the contactor (12XN)
    . between the pin B/5 of the contactor (12XX) and the first terminal block
    . between the pin B/12 of the contactor (12XN) and the first terminal block ASM 244201.
   (2) If the circuit breaker is open:
     (a) If the fault continues:
  • Replace the C/B-SVCE/BUS 2/212XP SPLY [2XX] .
Subtask 24-42-00-710-051-A
B. Do this test to make sure that the system operates correctly.
   (1) Do the test given in Para. 3. and make sure that:
  • the ceiling forward and aft lights (L side) come on.
  • the window forward and aft lights (R side) come on.
5. Close-up
Subtask 24-42-00-860-051-A
A. Put the aircraft back to its initial configuration.
   (1) On the forward attendant panel 120RH release the CABIN WDO and CABIN CLG pushbutton switches.
   (2) De-energize the ground service network with the ground power unit AMM 24-42-00-862-001.
[Rev.8 from Aug 2018] 2026.04.04 04:26:55 UTC
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