DOC AIRBUS | TSM A320FCAN Bus Problem AFT LDCC Smoke-Detection
TASK 26-16-00-810-820-A
CAN Bus Problem AFT LDCC Smoke-Detection
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 26-16-00-865-066-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-810-104-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-860-069-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:27:19 UTC
CAN Bus Problem AFT LDCC Smoke-Detection
1. Possible Causes
- wiring
- AFT LDCC smoke detector
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 26-17-00-810-830-A | Unexpected Smoke Detector |
| AMM 26-10-00-740-802 | Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) |
| ASM 261602 | |
| AMM 26-16-15-000-001 | Removal of the Cargo-Compartment Smoke Detectors |
| AMM 26-16-15-400-001 | Installation of the Cargo-Compartment Smoke Detectors |
Subtask 26-16-00-865-066-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 26-16-00-710-089-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 circuit breakers 14WH, 15WH, 17WH and 18WH, wait for approximately 10 seconds and close them again, wait for a minimum of 30 seconds before you start the test.
(2) After a minimum time of 30 seconds, do the Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) AMM 26-10-00-740-802.
4. Fault Isolation(1) Open the circuit breakers 14WH, 15WH, 17WH and 18WH, wait for approximately 10 seconds and close them again, wait for a minimum of 30 seconds before you start the test.
(2) After a minimum time of 30 seconds, do the Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) AMM 26-10-00-740-802.
Subtask 26-16-00-810-104-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message:
Subtask 26-16-00-810-105-A ** ON A/C NOT FOR ALL - Do the trouble shooting procedure related to the maintenance message.
B. If the test gives the maintenance message WRG: CAN BUS X / SMK DET AFT LDCC (XWH), (XWH = FIN of the related smoke detector):
(1) If the test gives the additional message WRG: SMK DET ADDRESS/ CAN BUS X, start troubleshooting according to that message first (Ref. TSM TASK 26-17-00-810-830).
(2) If the fault continues:
Subtask 26-16-00-710-090-A ** ON A/C NOT FOR ALL (1) If the test gives the additional message WRG: SMK DET ADDRESS/ CAN BUS X, start troubleshooting according to that message first (Ref. TSM TASK 26-17-00-810-830).
(2) If the fault continues:
- Do a check and repair the wiring between the CIDS DIR 1 (101RH) and the AFT LDCC smoke detector XWH ASM 261602.
- Replace the AFT LDCC smoke detector XWH AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
C. Do the test given in Para. 3.
5. Close-upSubtask 26-16-00-860-069-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.