ECAM Indication only - AIR COND CTL 1-B FAULT

TASK 21-61-00-810-899-A
ECAM Indication only - AIR COND CTL 1-B FAULT

1. Possible Causes

wiring
RELAY 35XE
CONT-AIR COND SYSTEM 1 [47HH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 216103
AMM 21-61-34-000-002	Removal of the Air-Conditioning System Controller
AMM 21-61-34-400-002	Installation of the Air-Conditioning System Controller

3. Fault Confirmation
Subtask 21-61-00-710-194-A ** ON A/C NOT FOR ALL

A. Do a read out of the POST FLIGHT REPORT.

4. Fault Isolation
Subtask 21-61-00-810-242-A ** ON A/C NOT FOR ALL

A. If the POST FLIGHT REPORT shows the warning AIR COND CTL 1-B FAULT without any associated maintenance messages:
(1) Do a check of the wiring ASM 216103 from,

the ACSC1 (47HH/C) pin 1 to the CB (50HH) (115VAC supply) and,
the ACSC1 (47HH/C) pin 2 to the CB (52HH) (28VDC supply).

(2) If there is no continuity from the last wiring check do a check of the wiring from,

the ACSC1 (47HH/C) pin 2 to the RELAY (35XE) pin A3 and,
the RELAY (35XE) pin A2 to the CB (52HH) (28VDC supply).

(3) If these wiring checks are satisfactory replace the RELAY 35XE
If the fault continues:

replace the CONT-AIR COND SYSTEM 1 [47HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.

Subtask 21-61-00-710-195-A ** ON A/C NOT FOR ALL

B. Do the procedure as in Para. 3. A.

[Rev.8 from Aug 2018] 2026.04.04 04:24:58 UTC