Failure of the Supply from the 28VDC HOT BUS (701PP)

TASK 24-38-00-810-824-A
Failure of the Supply from the 28VDC HOT BUS (701PP)

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)
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)

3. Fault Confirmation
Subtask 24-38-00-710-088-A

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

4. Fault Isolation
Subtask 24-38-00-810-073-A

A. If the test gives the maintenance message CHECK HOT BUS 701PP/BCL1 CIRCUIT:

do a check of the wiring for open circuit between the BAT REF/BCL1 circuit breaker (9PB1) and the pin A/C of the BCL1 ASM 243801.

(1) If the wiring is not correct:

(2) If the wiring is correct:

(3) If the fault continues:

Subtask 24-38-00-710-089-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:26:48 UTC