Loss of the Output Bus from the ACSC2 or the Zone Temperature Controller to the CFDIU

TASK 31-32-00-810-885-A
Loss of the Output Bus from the ACSC2 or the Zone Temperature Controller to the CFDIU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-32-00-740-009	Read the AVIONICS STATUS on the MCDU
ASM 313205
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU

3. Fault Confirmation
Subtask 31-32-00-740-214-A

A. Read the AVIONICS STATUS on the MCDU AMM 31-32-00-740-009.

4. Fault Isolation
Subtask 31-32-00-810-134-A

A. If the test gives the maintenance message NO ZONE CTL DATA or NO ACSC2 DATA:

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AB/2B, 2C to the first terminal block ASM 313205.

Subtask 31-32-00-740-215-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:29:54 UTC