Failure of the ELEC/BAT1 Pushbutton Switch Circuit

TASK 24-38-00-810-840-A
Failure of the ELEC/BAT1 Pushbutton Switch Circuit

1. Possible Causes

P/BSW-ELEC/BAT 1 [7PB1]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2045110
ASM 243801
AWM 243805
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 24-38-00-860-061-A

A. Job Set-up
(1) Push the ELEC/BAT 1 pushbutton switch (7PB1).
(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 24-38-00-710-118-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 1 OFF message comes into view.
2.On the ELEC panel 35VU: release and push the BAT 1 pushbutton switch (7PB1).	If on the upper ECAM DU: the BAT 1 OFF message goes out of view, stop the trouble shooting. If on the upper ECAM DU: the BAT 1 OFF message stays in view, continue the trouble shooting (refer to the fault isolation which follows).

4. Fault Isolation
Subtask 24-38-00-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/BAT REF/BCL1	9PB1	F01
105VU	ELEC/BAT BUS/REF/BCL1	8PB1	G01
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06

Subtask 24-38-00-810-091-A

B. If the test confirms the fault:

open the circuit breakers 30LP, 8PB1 and 9PB1
replace the P/BSW-ELEC/BAT 1 [7PB1] ESPM 2045110
close the circuit breakers 30LP, 8PB1 and 9PB1.

(1) If the fault continues:

Do a check of the wiring :
. from the pin A/A3 of the ELEC/BAT 1 pushbutton switch (7PB1) to the DC1 ground ASM 243801, AWM 243805 and AWM 249106
. from the pin A/A2 of the ELEC/BAT 1 pushbutton switch (7PB1) to the pin 8M of the first terminal block 2407VT ASM 243801 and AWM 243805
. from the pin 8F of the first terminal block 2407VT to the pin 25F of the second terminal block 1862VT ASM 243801 and AWM 315428
. from the pin 25N of the second terminal block 1862VT to the pin AA/7B of the SDAC1 (1WV1) ASM 243801 and AWM 315428
. from the pin 25X of the second terminal block 1862VT to the pin AA/7B of the SDAC2 (1WV2) ASM 243801 and AWM 315428.

(a) If there is no continuity:

repair the wiring.

Subtask 24-38-00-710-119-A

C. Do the test given in Para. 3.

5. Close-up
Subtask 24-38-00-860-062-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