Failure of the ELEC/BAT2 Pushbutton Switch Circuit

TASK 24-38-00-810-839-A
Failure of the ELEC/BAT2 Pushbutton Switch Circuit

1. Possible Causes

P/BSW-ELEC/BAT 2 [7PB2]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2045110
ASM 243802
AWM 243806
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
AWM 249106
AWM 315428
AMM 31-60-00-860-001	EIS Start Procedure

3. Fault Confirmation
Subtask 24-38-00-860-059-A

A. Job Set-up
(1) Push the ELEC/BAT 2 pushbutton switch (7PB2).
(2) 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 24-38-00-710-116-A

B. Test

ACTION	RESULT
1.On the ECAM control panel: push the ELEC key to get the ELEC page.	On the upper ECAM DU: the BAT 2 OFF message comes into view.
2.On the ELEC panel 35VU: release and push the BAT 2 pushbutton switch (7PB2).	If on the upper ECAM DU: the BAT 2 OFF message goes out of view, stop the trouble shooting. If on the upper ECAM DU: the BAT 2 OFF message stays in view, continue the trouble shooting (refer to the fault isolation which follows).

4. Fault Isolation
Subtask 24-38-00-865-053-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/BAT REF/BCL2	9PB2	F02
105VU	ELEC/BAT BUS/REF/BCL2	8PB2	J02
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06

Subtask 24-38-00-810-090-A

B. If the test confirms the fault:

open the circuit breakers 30LP, 8PB2 and 9PB2
replace the P/BSW-ELEC/BAT 2 [7PB2] ESPM 2045110
close the circuit breakers 30LP, 8PB2 and 9PB2.

(1) If the fault continues:

do a check of the wiring :
. from the pin A/A3 of the ELEC/BAT 2 pushbutton switch (7PB2) to the DC1 ground ASM 243802, AWM 243806 and AWM 249106
. from the pin A/A2 of the ELEC/BAT 2 pushbutton switch (7PB2) to the pin 11Y of the first terminal block 2407VT ASM 243802 and AWM 243806
. from the pin 11P of the first terminal block 2407VT to the pin 25M of the second terminal block 1862VT ASM 243802 and AWM 315428
. from the pin 25E of the second terminal block 1862VT to the pin AD/7H of the SDAC1 (1WV1) ASM 243802 and AWM 315428
. from the pin 25V of the second terminal block 1862VT to the pin AD/7H of the SDAC2 (1WV2) ASM 243802 and AWM 315428.

(a) If there is no continuity:

repair the wiring.

Subtask 24-38-00-710-117-A

C. Do the test given in Para. 3.

5. Close-up
Subtask 24-38-00-860-060-A

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:26:51 UTC