DOC AIRBUS | TSM A320FCIDS-SDF - Loss of Power Supply
TASK 26-17-00-810-825-A
CIDS-SDF - Loss of Power Supply
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 26-17-00-865-060-A ** ON A/C NOT FOR ALL
Subtask 26-17-00-810-132-A ** ON A/C NOT FOR ALL
Subtask 26-17-00-860-072-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:27:22 UTC
CIDS-SDF - Loss of Power Supply
1. Possible Causes
- C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH]
- C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH]
- aircraft wiring
- DIR-CIDS, 1 [101RH]
- DIR-CIDS, 2 [102RH]
- C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
- C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
- cargo-compartment smoke detectors
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 |
| 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 26-17-00-865-060-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 26-17-00-710-096-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 30s, 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 30s, do the Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) AMM 26-10-00-740-802.
Subtask 26-17-00-810-132-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message:
Subtask 26-17-00-810-133-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 CIDS(101RH)-SDF1 28VDC2 SPLY or CIDS(102RH)-SDF2 28VDC1 SPLY:
(1) Do a check of the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH] (28VDC2 for CIDS-SDF 1) or C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH] (28VDC1 for CIDS-SDF 2).
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH] and the CIDS-SDF1 AC/10
ASM 261602.
(b) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH] and the CIDS-SDF2 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between the Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH]
ASM 261602.
(b) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the associated DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH]
AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
Subtask 26-17-00-810-154-A ** ON A/C NOT FOR ALL (1) Do a check of the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH] (28VDC2 for CIDS-SDF 1) or C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH] (28VDC1 for CIDS-SDF 2).
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH] and the CIDS-SDF1 AC/10
ASM 261602.
(b) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH] and the CIDS-SDF2 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between the Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/1 [17WH]
ASM 261602.
(b) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR2 ESS [18WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the associated DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH]
AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
C. If the test gives the maintenance message CIDS(101RH)-SDF1 28VDC1 SPLY or CIDS(102RH)-SDF2 28VDC2 SPLY:
(1) Do a check of the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] (28VDC1 for CIDS-SDF 1 and Smoke Detectors) or C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] (28VDC2 for CIDS-SDF 2 and Smoke Detectors).
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the CIDS-SDF2 AC/10
ASM 261602.
(b) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the CIDS-SDF1 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
ASM 261602.
(b) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the associated DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH]
AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breakers C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] / C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors (C/B 15WH for smoke detectors connected to CAN Bus A and C/B 14WH for smoke detectors connected to CAN Bus B) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
Subtask 26-17-00-810-158-A ** ON A/C NOT FOR ALL (1) Do a check of the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] (28VDC1 for CIDS-SDF 1 and Smoke Detectors) or C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] (28VDC2 for CIDS-SDF 2 and Smoke Detectors).
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the CIDS-SDF2 AC/10
ASM 261602.
(b) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the CIDS-SDF1 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
ASM 261602.
(b) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the associated DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH]
AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breakers C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] / C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors (C/B 15WH for smoke detectors connected to CAN Bus A and C/B 14WH for smoke detectors connected to CAN Bus B) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
D. If the test gives the maintenance message CIRCUIT BREAKER 15WH/ WRG: CAN BUS A:
(1) Do a check of the C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the CIDS-SDF1 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
ASM 261602.
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors connected to CAN Bus A (15WH) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
Subtask 26-17-00-810-159-A ** ON A/C NOT FOR ALL (1) Do a check of the C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the CIDS-SDF1 AC/9
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 801PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
ASM 261602.
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR1 ESS [15WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors connected to CAN Bus A (15WH) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
E. If the test gives the maintenance message CIRCUIT BREAKER 14WH/ WRG: CAN BUS B:
(1) Do a check of the C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the CIDS-SDF2 AC/10
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors connected to CAN Bus B (14WH) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
Subtask 26-17-00-710-097-A ** ON A/C NOT FOR ALL (1) Do a check of the C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
(a) If the circuit breaker is blown, replace it.
(b) If the circuit breaker is open, close it.
(2) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the CIDS-SDF2 AC/10
ASM 261602.
(3) If the fault continues:
(a) Do a check and repair the aircraft wiring between Power Bus Bar 204PP and the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH]
ASM 261602.
(4) If the fault continues:
(a) Replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001
(5) If the fault continues:
(a) Do a check and repair the aircraft wiring between the circuit breaker C/B-AIR COND/CIDS/SDF/DIR NORM/2 [14WH] and the cargo-compartment smoke detectors
ASM 261602.
(6) If the fault continues:
(a) Disconnect the cargo-compartment smoke detectors connected to CAN Bus B (14WH) and reconnect them. Check to see if the fault continues after each connection of a smoke detector. If the fault continues replace the related smoke detector
AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
F. Do the test given in Para. 3.
5. Close-upSubtask 26-17-00-860-072-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.