Loss of DC Busbars and DC Generation

TASK 24-60-00-810-813-A
Loss of DC Busbars and DC Generation

1. Possible Causes

internal wiring of the different parts of the panel 120VU

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
AMM 31-60-00-860-001	EIS Start Procedure

3. Fault Confirmation
Subtask 24-60-00-860-070-A

A. Job Set-up
(1) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.

Subtask 24-60-00-710-074-A

B. Test

ACTION	RESULT
1.On the ECAM control panel: push the ELEC key to get the ELEC page.	On the upper ECAM display unit: the ELEC DC EMER CONFIG warning comes into view. On the lower ECAM display unit: the amber DC 1, DC 2 and DC ESS indications come on the amber TR 1, TR 2 and ESS TR indications come on with the related parameters.

4. Fault Isolation
Subtask 24-60-00-810-062-A

A. If the test confirms the fault:

make sure that no tool or other item has been forgotten in the panel 120VU.

(1) If the result of the inspection is correct:

do a check and repair the internal wiring of the different parts of the panel 120VU for short to ground between the break connectors and successively the circuit breakers and other components.

5. Close-up
Subtask 24-60-00-860-071-A

A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

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