DOC AIRBUS | TSM A320FFire-Extinguisher Bottle 2 Low Pressure
TASK 26-23-00-810-812-A
Fire-Extinguisher Bottle 2 Low Pressure
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 26-23-00-865-051-A ** ON A/C NOT FOR ALL
Subtask 26-23-00-810-072-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:27:25 UTC
Fire-Extinguisher Bottle 2 Low Pressure
1. Possible Causes
- FIRE EXTINGUISHER [4020WX]
- PUSHBUTTON SWITCH-TEST [16WH]
- DIR-CIDS, 1 [101RH]
- DIR-CIDS, 2 [102RH]
- wiring
- FIRE EXTINGUISHER [4010WX]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-73-34-000-001 | Removal of the CIDS Director |
| AMM 23-73-34-400-001 | Installation of the CIDS Director |
| ASM 262301 | |
| AMM 26-23-41-000-004 | Removal of the Cargo Fire-Extinguisher Bottle |
| AMM 26-23-41-400-004 | Installation of the Cargo Fire-Extinguisher Bottle |
| AMM 26-23-42-000-001 | Removal of the Cargo Fire-Extinguisher Bottle |
| AMM 26-23-42-400-001 | Installation of the Cargo Fire-Extinguisher Bottle |
Subtask 26-23-00-865-051-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 26-23-00-710-072-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/CIDS/SDF/DIR2 ESS | 18WH | C06 |
| 49VU | AIR COND/CIDS/SDF/DIR1 ESS | 15WH | C05 |
| 122VU | AIR COND/CIDS/SDF/DIR NORM/2 | 14WH | T18 |
| 122VU | AIR COND/CIDS/SDF/DIR NORM/1 | 17WH | T17 |
B. Test
(1) Open the ciruit breakers 14WH, 15WH, 17WH and 18WH. After approx. 10 s close them again.
4. Fault Isolation(1) Open the ciruit breakers 14WH, 15WH, 17WH and 18WH. After approx. 10 s close them again.
Subtask 26-23-00-810-072-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message:
Subtask 26-23-00-810-073-A ** ON A/C NOT FOR ALL - Do the troubleshooting procedure related to the maintenance message.
B. If the test gives the maintenance message CRG FIRE BTL 2 LO PR:
Do a check and repair the wiring between:
Subtask 26-23-00-810-073-B ** ON A/C NOT FOR ALL - Replace the FIRE EXTINGUISHER [4020WX] AMM 26-23-42-000-001 and AMM 26-23-42-400-001.
- Do a check of the P/B switch PUSHBUTTON SWITCH-TEST [16WH] and replace it, if necessary ASM 262301.
- Replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
- Replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
Do a check and repair the wiring between:
- Bottle 2 (4020WX) connector B/C and switch (16WH) pin A/B3.
- Switch (16WH) pin A/B2 and DIR-CIDS 1 (101RH) connector AA/4G.
- Switch (16WH) pin A/B2 and DIR-CIDS 2 (102RH) connector AA/4G.
- Bottle 2 (4020WX) connector B/A and GND ASM 262301.
B. If the test gives the maintenance message CRG FIRE BTL 2 LO PR:
(1) Replace the FIRE EXTINGUISHER [4010WX] AMM 26-23-41-000-004 and AMM 26-23-41-400-004.
(2) If the fault continues:
Do a check and repair the wiring between:
Subtask 26-23-00-710-073-A ** ON A/C NOT FOR ALL (1) Replace the FIRE EXTINGUISHER [4010WX] AMM 26-23-41-000-004 and AMM 26-23-41-400-004.
(2) If the fault continues:
- Do a check of the ASM 262301 and replace it, if necessary PUSHBUTTON SWITCH-TEST [16WH] .
- Replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
- Replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
Do a check and repair the wiring between:
- BOTTLE 2 (4010WX) connector B/C and switch (16WH) pin A/B3
- Switch (16WH) pin A/B2 and DIR-CIDS 1 (101RH) connector AA/4G
- Switch (16WH) pin A/B2 and DIR-CIDS 2 (102RH) connector AA/4G
- BOTTLE 2 (4010WX) connector B/A and GND ASM 262301.
C. Do the test given in para. 3.