Outflow Valve Electronic Module 1 Fault (04)

TASK 21-31-00-810-829-A
Outflow Valve Electronic Module 1 Fault (04)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-31-00-710-002	Operational Test of the Pressure Control and Monitoring
AMM 21-31-00-760-001	Resistance Check of the Return Ground Connections - Cabin Pressure Controller (CPC) 1 (11HL) and 2 (12HL) and the Electronic Modules 10HL-1 and 10HL-2
ASM 213101
ASM 213102
AMM 21-31-34-000-001	Removal of the Cabin Pressure Controller
AMM 21-31-34-400-001	Installation of the Cabin Pressure Controller
AMM 21-31-51-000-002	Removal of the Outflow Valve (10HL) - Electronics Module 10HL-1 (10HL-2)
AMM 21-31-51-400-002	Installation of the Outflow Valve (10HL) - Electronics Module 10HL-1 (10HL-2)

3. Fault Confirmation
Subtask 21-31-00-710-106-A

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

4. Fault Isolation
Subtask 21-31-00-810-180-A

A. If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT, and/or the test gives the maintenance message which follows,

OUTFLOW VALVE ELEC 1 (04):
replace the VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 1 (referred to as OFV (10HL)) AMM 21-31-51-000-002 and AMM 21-31-51-400-002.

NOTE: The electronic module 1 is connected to the electrical connector 10HL-A.

(1) If the fault continues:

do a check of the RELAY-AUTO MODE DRIVE SHUT OFF (17HL) and replace it if necessary ASM 213101.

(2) If the fault continues:

do a check of the P/BSW-CABIN PRESS/MODE SEL/AUTO [14HL] and replace it if necessary,
ASM 213101.

(3) If the fault continues:

swap the CPC 1 (11HL) and the CPC 2 (12HL),
AMM 21-31-34-000-001 and,
AMM 21-31-34-400-001.

(a) If the fault moves with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL),
AMM 21-31-34-000-001 and,
AMM 21-31-34-400-001.
replace the PRESS CONT 1 [11HL] ,
AMM 21-31-34-000-001 and,
AMM 21-31-34-400-001.

(b) If the fault does not move with the CPC 1:

swap back the CPC 1 (11HL) and the CPC 2 (12HL),
AMM 21-31-34-000-001 and,
AMM 21-31-34-400-001.

1 Do a check and repair the wiring from the:

OFV connector (10HL-A) pin K to the CB (1HL),
OFV connector (10HL-A) pin L to the CPC 1 connector (11HL-AA) pin 15D,
OFV connector (10HL-A) pins G and J to the GND,
OFV connector (10HL-A) pins R, P, N and M to the CPC 1 connector (11HL-AA) pins 7A, 8A, 9A and 10A.
ASM 213101 and,
ASM 213102.

2 Do a check of the earthing resistance at the return ground connections AMM 21-31-00-760-001 on:

NOTE: The resistance must be smaller than 20 m.ohms.

Subtask 21-31-00-710-108-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:38:49 UTC