Pack 2 Controller (ACSC 2) Fault - Outlet Temperature / Compressor Outlet Temperature Indication replaced by Amber XX

TASK 21-61-00-810-854-A
Pack 2 Controller (ACSC 2) Fault - Outlet Temperature / Compressor Outlet Temperature Indication replaced by Amber XX

1. Possible Causes

P2 CONTROLLER [27HH]
wiring
CONT-AIR COND SYSTEM 2 [57HH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 21-61-00-810-821-A	Pack 2 Electrical Component with Short Circuit (AIR PACK 2 REGUL FAULT)
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System
ASM 216101
AMM 21-61-34-000-001	Removal of the Pack Controller
AMM 21-61-34-000-002	Removal of the Air-Conditioning System Controller
AMM 21-61-34-400-001	Installation of the Pack Controller
AMM 21-61-34-400-002	Installation of the Air-Conditioning System Controller
ASM 216302

3. Fault Confirmation
Subtask 21-61-00-710-142-A ** ON A/C NOT FOR ALL

A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.

NOTE: If a fault is detected, the PC gives a fault code for shop maintenance in addition to the related CFDS message(s) (refer to TSM chapter 21-63-00, page block 301).

Subtask 21-61-00-710-142-B ** ON A/C NOT FOR ALL

A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.

4. Fault Isolation
Subtask 21-61-00-810-170-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message P2 CONT:

replace the P2 CONTROLLER [27HH] AMM 21-61-34-000-001 and AMM 21-61-34-400-001.

(1) If the fault continues:

do a check and repair the wiring if necessary between:
PC 2 (27HH) connector AA/5A and CB (21HH),
PC 2 (27HH) connector AA/5B and GND,
PC 2 (27HH) connector AB/13D and CB (22HH),
PC 2 (27HH) connector AB/14A and GND ASM 216101.

(2) If the fault continues:

a check and repair if necessary the wiring of the signal:
ARINC 429 XTR (M) from the ZC (8HK) to the PC 2 (27HH),
ARINC 429 XTR (S) from the ZC (8HK) to the PC 2 (27HH),
ARINC 429 RCV (S) from the ZC (8HK) to the PC 1 (7HH) ASM 216302.

(3) If the fault continues:

do the trouble shooting procedures for the pack 2 electrical component with short circuit (Ref. TSM TASK 21-61-00-810-821).

Subtask 21-61-00-810-170-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ACSC2(57HH):

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

(1) If the fault continues:

do the trouble shooting procedures for the pack 2 electrical component with short circuit (Ref. TSM TASK 21-61-00-810-821).

Subtask 21-61-00-710-143-A

B. Do the test as given in the Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:24:55 UTC