Battery 1 Fuse Blown

TASK 24-38-00-810-807-A
Battery 1 Fuse Blown

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-38-00-710-001	Operational Test of the Battery Charge Limiter (BCL), (with the CFDS)
AMM 24-38-00-960-801	Replacement of the DC Fuse 4PB11(4PB21)
ASM 243801
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 24-38-51-280-001	Removal of the Battery for Overhaul
AMM 24-38-55-000-001	Removal of the Battery Line Contactor
AMM 24-38-55-400-001	Installation of the Battery Line Contactor
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

3. Fault Confirmation
Subtask 24-38-00-710-062-A

A. Test
Do the operational test of the BCL 1 AMM 24-38-00-710-001.

4. Fault Isolation
Subtask 24-38-00-810-056-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message FUSE 4PB1:

(1) If the fault continues:

(a) If the fault continues:

1 If the fault continues:

a If the fault continues:

Do a check and repair the wiring between ASM 243801:
* Pin A/L of the BLC1 (1PB1) and the BAT1 shunt (3PB1)
* Pin A/F of the battery 1 line contactor (6PB1) and the 28VDC battery busbar (3PP).

Subtask 24-38-00-810-056-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message FUSE 4PB1:

(1) If the fault continues:

(a) If the fault continues:

(b) If the fault continues:

1 If the fault continues:

a If the fault continues:

Do a check and repair the wiring between ASM 243801:
* Pin A/L of the BLC1 (1PB1) and the BAT1 shunt (3PB1)
* Pin A/F of the battery 1 line contactor (6PB1) and the 28VDC battery busbar (3PP).

Subtask 24-38-00-710-063-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:26:47 UTC