ACSC2 Pin Programming Fault

TASK 21-61-00-810-908-A
ACSC2 Pin Programming Fault

1. Possible Causes

connector pins
CONT-AIR COND SYSTEM 2 [57HH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 21-61-00-710-190-A ** ON A/C NOT FOR ALL

A. Do a read out of the PREVIOUS LEG REPORT.

4. Fault Isolation
Subtask 21-61-00-810-240-F ** ON A/C NOT FOR ALL

A. If the PREVIOUS LEG REPORT gives the maintenance message INVALID ACFT PIN PROG ACSC2:
(1) Do a check and repair if necessary the connector pins at the connector (57HH/AB):
(a) CIDS option:

pin 3E to ground.

(b) Aircraft Type:

pin 3H to ground.
pins 3F and 3G to open contact.

pin 2K to open contact.

(d) Installation Position Information:

pins 3D and 3J to open contact.

(e) AIV not installed:

pin 7C to ground.

(2) If the fault continues:

replace the CONT-AIR COND SYSTEM 2 [57HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.

Subtask 21-61-00-810-240-J ** ON A/C NOT FOR ALL

A. If the PREVIOUS LEG REPORT gives the maintenance message INVALID ACFT PIN PROG ACSC2:
(1) Do a check and repair if necessary the connector pins at the connector (57HH/AB):
(a) CIDS option:

pin 3E to ground.

(b) Aircraft Type:

pin 3H to ground.
pins 3F and 3G to open contact.

pin 2K to ground.

(d) Installation Position Information:

pins 3D and 3J to open contact.

(e) AIV not installed:

pin 7C to ground.

(f) Bleed Protection Logic:

pin 7E to ground.

(2) If the fault continues:

replace the CONT-AIR COND SYSTEM 2 [57HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.

Subtask 21-61-00-810-240-K ** ON A/C NOT FOR ALL

A. If the PREVIOUS LEG REPORT gives the maintenance message INVALID ACFT PIN PROG ACSC2:
(1) Do a check and repair if necessary the connector pins at the connector (57HH/AB):
(a) CIDS option:

pin 3E to ground.

(b) Aircraft Type:

pins 3G and 3H to ground.
pin 3F to open contact.

pin 2K to ground.

(d) Installation Position Information:

pins 3D and 3J to open contact.

(e) AIV not installed:

pin 7C to ground.

(f) Bleed Protection Logic:

pin 7E to ground.

(g) A321 3-Position Flow Selector:

pin 2D to ground.

(2) If the fault continues:

replace the CONT-AIR COND SYSTEM 2 [57HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.

Subtask 21-61-00-710-191-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:24:59 UTC