Manual Mode - CPC Fault

TASK 21-31-00-810-802-A
Manual Mode - CPC Fault

1. Possible Causes

CONNECTOR (11HL-AB)
CONNECTOR (12HL-AB)
CONNECTOR (14HL-A)
PRESS CONT 1 [11HL]
PRESS CONT 2 [12HL]
P/BSW-CABIN PRESS/MODE SEL/AUTO [14HL]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-31-00-710-002	Operational Test of the Pressure Control and Monitoring
ASM 213101
AMM 21-31-34-000-001	Removal of the Cabin Pressure Controller
AMM 21-31-34-400-001	Installation of the Cabin Pressure Controller

3. Fault Confirmation
Subtask 21-31-00-710-051-A

A. Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.

4. Fault Isolation
Subtask 21-31-00-810-052-A

A. If, when the MAN mode is selected, on the upper ECAM DU the warning CAB PR SYS 1+2 FAULT shows and,
on the MODE SEL p/b switch the FAULT legend comes on do a:
(1) Wiring Continuity and Ground check ASM 213101
(a) Do a check for continuity of the electrical wiring at,

the CONNECTOR (11HL-AB) pin 3B,
the CONNECTOR (12HL-AB) pin 3B and,
the CONNECTOR (14HL-A) pin C1.

(b) If the wiring is not correct:

repair as required.

the CONNECTOR (11HL-AB) pin 3B,
the CONNECTOR (12HL-AB) pin 3B and,
the CONNECTOR (14HL-A) pin C1.

NOTE: A ground condition should not be found.

(2) If a ground condition is found at any of the pins checked in Para. 4 A. (1):

replace the related,
PRESS CONT 1 [11HL] or PRESS CONT 2 [12HL] , AMM 21-31-34-000-001 and AMM 21-31-34-400-001 or,
the P/BSW-CABIN PRESS/MODE SEL/AUTO [14HL] ASM 213101.

5. Close-up
Subtask 21-31-00-720-050-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:24:41 UTC