Failure of the Engine 1 Air Intake Anti-Ice Valve Fault Legend indication without associated message on ECAM

TASK 30-21-00-810-806-A
Failure of the Engine 1 Air Intake Anti-Ice Valve Fault Legend indication without associated message on ECAM

1. Possible Causes

wiring between pin A/10 of the engine 1 air intake anti-ice valve and the ground terminal
wiring between pin A/3 of the engine 1 air intake anti-ice valve and the ground terminal
wiring between pin A/6 of the engine 1 air intake anti-ice valve and the ground terminal
VALVE-ENG AIR INTAKE ANTI ICE [4000DN]
P/BSW-ANTI ICE/ENG 1 [2DN1]
wiring between the engine 1 air intake anti-ice valve (4000DN) and the circuit breaker (1DN1)
C/B [1DN1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-00-00-810-803-A	Circuit Breaker Tripped and/or C/B TRIPPED Warning
AMM 30-21-00-710-002	Operational Test of the Engine Air Intake Ice Protection (with the Engines in operation)
ASM 302101
AMM 30-21-51-000-041	Removal of the Engine Air-Intake Anti-ice Valve
AMM 30-21-51-400-042	Installation of the Engine Air-Intake Anti-ice Valve

3. Fault Confirmation
Subtask 30-21-00-710-059-A ** ON A/C NOT FOR ALL

A. Test
Do the operational test of the engine air intake ice protection AMM 30-21-00-710-002.

4. Fault Isolation
Subtask 30-21-00-865-054-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-00-810-055-A ** ON A/C NOT FOR ALL

B. If the test confirms the fault:

do a check of the status of the circuit breaker (1DN1).

(1) If the circuit breaker is closed:

do a check for 28VDC at pin A/9 of the engine 1 air intake anti-ice valve (4000DN).

(a) If there is 28VDC:

do a check for a ground signal at pin A/10 of the engine 1 air intake anti-ice valve (4000DN).

1 If there is no ground signal:

repair the wiring between pin A/10 of the engine 1 air intake anti-ice valve and the ground terminal ASM 302101.

2 If there is a ground signal:

do a check of the wiring between pin A/3 of the engine 1 air intake anti-ice valve and the ground terminal ASM 302101.

a If there is no continuity:

repair the above wiring.

b If there is continuity:

do a check of the wiring between pin A/6 of the engine 1 air intake anti-ice valve and the ground terminal ASM 302101.
If there is no ground signal repair the wiring between pin A/6 of the engine 1 air intake anti-ice valve and the ground terminal ASM 302101.

c Do the operational test of the engine air intake ice protection AMM 30-21-00-710-002.
(b) If the fault continues:

replace the VALVE-ENG AIR INTAKE ANTI ICE [4000DN] AMM 30-21-51-000-041 and AMM 30-21-51-400-042.

1 If there is no 28VDC:

replace the P/BSW-ANTI ICE/ENG 1 [2DN1] .

2 If there is 28VDC:

do a check and repair the wiring between the engine 1 air intake anti-ice valve (4000DN) and the circuit breaker (1DN1).

(2) If the circuit breaker is open:

Do the procedure (Ref. TSM TASK 24-00-00-810-803).

(a) If the fault continues:

replace the C/B [1DN1] .

Subtask 30-21-00-710-060-A ** ON A/C NOT FOR ALL

C. Test
Do the operational test of the engine air intake ice protection AMM 30-21-00-710-002.

[Rev.8 from Aug 2018] 2026.04.04 04:29:31 UTC