Several Pack 2 'XX' indications on ECAM

TASK 21-61-00-810-872-A
Several Pack 2 'XX' indications on ECAM

1. Possible Causes

C/B-AIR COND/PACK TEMP/CTL SYS1/2/115VAC [21HH]
C/B-AIR COND/PACK TEMP CTL SYS2/2/115VAC [22HH]
P2 CONTROLLER [27HH]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System
AMM 21-61-34-000-001	Removal of the Pack Controller
AMM 21-61-34-400-001	Installation of the Pack Controller

3. Fault Confirmation
Subtask 21-61-00-710-156-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).

4. Fault Isolation
Subtask 21-61-00-810-204-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message P2 CONT and the Pack 2 indications which follow,

pack flow,
pack outlet temperature,
temperature control valve position,
pack compressor outlet temperature,
show amber XX on the ECAM BLEED page:

(1) Open and then close the C/B-AIR COND/PACK TEMP/CTL SYS1/2/115VAC [21HH] and the C/B-AIR COND/PACK TEMP CTL SYS2/2/115VAC [22HH] .

NOTE: This will do a reset of the Pack 2 controller.

(a) If, after the reset has been done, some of the indications still show amber XX on the ECAM BLEED page:

do the related trouble shooting procedure of the applicable XX indication/s refer to the Fault Symptom List.

(2) If the fault continues:

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

5. Close-up
Subtask 21-61-00-720-056-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:24:57 UTC