Unwanted ELEC DC ESS BUS SHED Warning

TASK 24-60-00-810-801-A
Unwanted ELEC DC ESS BUS SHED Warning

1. Possible Causes

SDAC-1 [1WV1]
SDAC-2 [1WV2]
CNTOR-DC SHED ESS BUS [8PH]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
ASM 246201
AMM 24-62-55-000-001	Removal of the DC Shed Essential Bus Contactor
AMM 24-62-55-400-001	Installation of the DC Shed Essential Bus Contactor
AMM 27-96-00-710-001	Operational Test of the FCDC
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 24-60-00-860-050-A

A. Job Set-up
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.

Subtask 24-60-00-710-050-A

B. Test
(1) Do the operational test of the FCDC AMM 27-96-00-710-001.
(2) If the test gives usual results that follow, go to the Para. Fault Isolation:

ACTION	RESULT
On the ECAM control panel: Push the ELEC key to get the ELEC page.	On the lower ECAM DU, on the ELEC page: The normal configuration comes into view with the SHED indication shown in amber below the DC ESS busbar.
	On the upper ECAM DU: The ELEC DC ESS BUS SHED warning comes into view.

4. Fault Isolation
Subtask 24-60-00-810-050-A

A. If the test confirms the fault:
(1) Remove SDAC1 AMM 31-55-34-000-001.
(a) If the fault does not continue:

Replace SDAC-1 [1WV1] AMM 31-55-34-400-001.

(b) If the fault continues:

Install SDAC1 AMM 31-55-34-400-001.
Remove SDAC2 AMM 31-55-34-000-001.

1 If the fault does not continue:

Replace SDAC-2 [1WV2] AMM 31-55-34-400-001.

2 If the fault continues:

Install SDAC2 AMM 31-55-34-400-001.
Replace CNTOR-DC SHED ESS BUS [8PH] AMM 24-62-55-000-001 and AMM 24-62-55-400-001.

a If the fault continues:

Do a check for continuity and repair the wiring between:
. Pin B/21 of the DC SHED ESS BUS contactor (8PH) and the first branch point 1853VT79-B
. Pin B/19 of the DC SHED ESS BUS contactor (8PH) and the ground, ASM 246201.

Subtask 24-60-00-710-051-A

B. Do this test to make sure that the system operates correctly:

ACTION	RESULT
On the ECAM control panel: Push the ELEC key to get the ELEC page.	On the lower ECAM DU, on the ELEC page: The normal configuration comes into view.
	On the upper ECAM DU: No message comes into view.

5. Close-up
Subtask 24-60-00-860-051-A

A. De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:26:58 UTC