Failure of the CFDIU BITE Memory

TASK 31-32-00-810-931-A
Failure of the CFDIU BITE Memory

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-32-00-740-002	BITE Test of the Centralized Fault Display Interface Unit (CFDIU)
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU

3. Fault Confirmation
Subtask 31-32-00-865-165-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	CFDS/CFDIU/SPLY	2TW	J18

Subtask 31-32-00-860-053-A

B. Open and close the circuit breaker 2TW before the test.

Subtask 31-32-00-740-306-A

C. Do the BITE test of the CFDIU AMM 31-32-00-740-002.

4. Fault Isolation
Subtask 31-32-00-810-182-A

A. If the test gives the maintenance message CFDIU BITE MEMORY:

Subtask 31-32-00-740-307-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:29:58 UTC