Communication RS232 to CIDS Mainboard failed

TASK 26-17-00-810-822-A
Communication RS232 to CIDS Mainboard failed

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-73-34-000-001	Removal of the CIDS Director
AMM 23-73-34-400-001	Installation of the CIDS Director
AMM 26-10-00-740-801	BITE Test of the Smoke Detection Function - System Test

3. Fault Confirmation
Subtask 26-17-00-710-090-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the smoke detection function - system test AMM 26-10-00-740-801.

4. Fault Isolation
Subtask 26-17-00-810-124-A ** ON A/C NOT FOR ALL

A. If the test gives a different maintenance message:

Subtask 26-17-00-810-125-A ** ON A/C NOT FOR ALL

B. If the test gives the maintenance message
DIR1(101RH)-SDF, SDF1(101RH)-DIR1(101RH), DIR2(102RH)-SDF or SDF2(102RH)-DIR2(102RH):

Replace related DIR-CIDS, 1 [101RH] or DIR-CIDS, 2 [102RH]
AMM 23-73-34-000-001 and AMM 23-73-34-400-001.

Subtask 26-17-00-710-091-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.

5. Close-up
Subtask 26-17-00-860-069-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:27:22 UTC