W DOC AIRBUS | TSM A320F

Repair of the Electrical Cargo-Compartment Fire-Extinguishing Circuit

TASK 26-23-00-810-813-A
Repair of the Electrical Cargo-Compartment Fire-Extinguishing Circuit

1. Possible Causes
  • bulbs
  • SDCU [10WQ]
  • wiring
  • BOARD-ANN LT TEST & INTFC [3LP]
  • DIR-CIDS, 1 [101RH]
  • DIR-CIDS, 2 [102RH]
  • BOARD-ANN LT TEST & INTFC [12LP]
  • BTL1 PRESS INVERTER 16WX
  • BTL2 PRESS INVERTER 17WX
  • INDICATOR LIGHT-AGENT DISCHARGED [12WX]
  • TIMER DISCH BTL2 RELAY 14WX
  • C/B-AIR COND/CARGO/FIRE/EXTIG/BTL1 [1WX]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 33-14-00-810-801-A
Failure of One Annunciator Light Only
AMM 23-73-34-000-001
Removal of the CIDS Director
AMM 23-73-34-400-001
Installation of the CIDS Director
AMM 26-16-00-710-001
Operational Check of Cargo-Compartment Smoke-Detection by PTT
ASM 261601
ASM 261703
AMM 26-17-34-000-001
Removal of the Smoke-Detection Control Unit (SDCU)
AMM 26-17-34-400-001
Installation of the Smoke-Detection Control Unit (SDCU)
ASM 262301
AMM 33-14-00-710-001
Operational Test of the Lights
3. Fault Confirmation
Subtask 26-23-00-710-074-A
A. Do the operational check of the cargo-compartment smoke-detection system by PTT AMM 26-16-00-710-001.
4. Fault Isolation
Subtask 26-23-00-810-074-A ** ON A/C NOT FOR ALL
A. If one SMOKE indicator light does not come on during the test:
   (1) If the fault continues:
  • Replace the related bulbs .
     (a) If the fault continues:
   (2) If the annunciator light test is OK:
     (a) If the fault continues:
  • Do a check and if necessary repair the wiring between the SDCU [10WQ] and the BOARD-ANN LT TEST & INTFC [3LP] ASM 261601.
Subtask 26-23-00-810-074-B ** ON A/C NOT FOR ALL
A. If one SMOKE indicator light does not come on during the test:
   (1) Do the trouble shooting procedure for failure of one annunciator light (Ref. TSM TASK 33-14-00-810-801).
     (a) If the annunciator light test is OK:
     (b) If the fault continues:
  • Do a check and if necessary repair the wiring between the DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH] and the BOARD-ANN LT TEST & INTFC [12LP] ASM 261601.
Subtask 26-23-00-810-075-B ** ON A/C NOT FOR ALL
B. If DISCH1 indication light on the overhead panel does not come on during the test:
   (1) If the fault continues:
  • Replace the related bulbs .
     (a) If the fault continues:
   (2) If the annunciator light test is OK:
  • Replace the BTL1 PRESS INVERTER 16WX .
     (a) If the fault continues:
  • Do a check and if necessary repair the wiring between the BTL1 PRESS INVERTER 16WX / BTL2 PRESS INVERTER 17WX and the BOARD-ANN LT TEST & INTFC [12LP] ASM 261601.
Subtask 26-23-00-810-076-B ** ON A/C NOT FOR ALL
C. If DISCH2 indication light on the overhead panel does not come on during the test:
   (1) Replace the BTL2 PRESS INVERTER 17WX .
   (2) If the fault continues:
  • Do a check and if necessary repair the wiring between the BTL2 PRESS INVERTER 17WX and INDICATOR LIGHT-AGENT DISCHARGED [12WX] ASM 262301.
   (3) If the fault continues:
  • Check the DIR-CIDS, 1 [101RH] / DIR-CIDS, 2 [102RH] pin programming if the BLT2 is connected to the GND ASM 261703 .
Subtask 26-23-00-810-077-B ** ON A/C NOT FOR ALL
D. If the DISCH AGENT 2 alert on the ECAM and the DISCH AGENT 2 indication light on the overhead panel does not come on during the test:
   (1) Replace the TIMER DISCH BTL2 RELAY 14WX .
   (2) If the fault continues:
  • Do a check and if necessary repair the wiring between the TIMER DISCH BTL2 RELAY 14WX and C/B-AIR COND/CARGO/FIRE/EXTIG/BTL1 [1WX] ASM 262301.
   (3) If the fault continues:
  • Do a check and if necessary repair the wiring between the TIMER DISCH BTL2 RELAY 14WX and DIR-CIDS, 1 [101RH] / DIR-CIDS, 2 [102RH] . ASM 262301.
   (4) If the fault continues:
  • Do a check and if necessary repair the wiring between TIMER DISCH BTL2 RELAY 14WX and BTL1 PRESS INVERTER 16WX ASM 262301.
   (5) If the fault continues:
  • Do a check and if necessary repair the wiring between BTL1 PRESS INVERTER 16WX and GND DC1 ASM 262301.
   (6) If the fault continues:
  • Check the DIR-CIDS, 1 [101RH] and DIR-CIDS, 2 [102RH] pin programming if the BLT2 is connected to the GND ASM 261703.
Subtask 26-23-00-810-078-B ** ON A/C NOT FOR ALL
E. If during the test the DISCH AGENT 2 indication light on the overhead panel does not come on, but the DISCH AGENT 2 alert on the ECAM comes on:
   (1) If the fault continues:
  • Replace the related bulbs .
     (a) If the fault continues:
   (2) If the annunciator light test is OK:
     (a) If the fault continues:
  • Do a check and if necessary repair the wiring between the DIR-CIDS, 1 [101RH] / DIR-CIDS, 2 [102RH] and the BOARD-ANN LT TEST & INTFC [12LP] ASM 261601.
Subtask 26-23-00-710-075-A
F. Do the test given in Para. 3.
5. Close-up
Subtask 26-23-00-860-062-A
A. Put the aircraft back to its initial configuration.
   (1) Make sure that the work area is clean and clear of tools and other items.
[Rev.8 from Aug 2018] 2026.04.04 04:27:26 UTC
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