Loss of the BCL1 Detected by the SDAC1

TASK 24-30-00-810-805-A
Loss of the BCL1 Detected by the SDAC1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-38-00-960-801	Replacement of the DC Fuse 4PB11(4PB21)
AMM 24-38-34-000-001	Removal of the Battery Charge Limiter (BCL)
AMM 24-38-34-400-001	Installation of the Battery Charge Limiter (BCL)
AMM 24-38-51-000-001	Removal of the Batteries
AMM 24-38-51-400-001	Installation of the Batteries
AMM 24-61-58-000-001	Removal of the DC Bus 1 Contactor Module
AMM 24-61-58-400-001	Installation of the DC Bus 1 Contactor Module
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
ASM 315403
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 24-30-00-710-058-A

A. Test
Do the operational test of the central warning systems AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 24-30-00-810-054-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : NO DATA FROM BCL1:

(1) If the voltage is not correct:

(2) If the voltage is correct:

(a) If the fault continues:

(b) If the fault continues:

Subtask 24-30-00-810-054-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : NO DATA FROM BCL1:

(1) If the voltage is not correct:

(2) If the voltage is correct:

(a) If the fault continues:

1 If the fault continues:

a If the fault continues:
* Do a check of the wiring between ASM 315403:

Pins AB/11G and AB/11H of SDAC1 (1WV1) and pins A/P and A/R of BCL1 (1PB1).
** If the wiring is not correct:
** - Repair the wiring .
** If the wiring is correct:
** - Replace MODULE-DC BUS 1 CNTOR [13PN] AMM 24-61-58-000-001 and AMM 24-61-58-400-001.

Subtask 24-30-00-710-059-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:26:45 UTC