DOC AIRBUS | TSM A320FWing Anti-Ice Control-Valves Do Not Operate
TASK 30-11-00-810-806-A
Wing Anti-Ice Control-Valves Do Not Operate
A. Referenced Information
3. Fault Confirmation
Subtask 30-11-00-710-060-A 4. Fault Isolation
Subtask 30-11-00-810-060-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:30 UTC
Wing Anti-Ice Control-Valves Do Not Operate
WARNING:
DO NOT TOUCH THE ANTI-ICE DUCTS UNTIL THEY ARE COOL. THE TEMPERATURE OF THE DUCTS STAYS HIGH FOR SOME TIME AFTER THE ENGINE STOPS.
1. Possible CausesC/B-ANTI-ICE/WING/CTL 2DL P/BSW ANTI ICE/WING 3DL - RELAY ANTI ICE VALVE CONTROL 5DL
- RELAY-GROUND TEST [4DL]
- aircraft wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 30-11-00-810-809-A | Wing Anti-Ice (Wing) Circuit Breaker 2DL Tripped |
| AMM 30-11-00-710-001 | Operational Test of the Wing Ice-Protection System |
| ASM 301101 | |
| AMM 32-69-00-860-001 | Simulation of Flight (With Aircraft on Ground) |
Subtask 30-11-00-710-060-A 4. Fault Isolation
Subtask 30-11-00-810-060-A
A. Procedure
(1) If the test is not OK go to para (2).
If the test is OK:
(a) Do a check of the aircraft wiring from the relay anti-ice control 5DL to the LGCIU 1 and LGCIU 2. ASM 301101.
(b) Repair the unservicable wiring/connectors.
(2) If the test in para. 3.A. is not OK:
(a) Do a check to see if the circuit breaker (2DL) is open, if it is open, do (Ref. TSM TASK 30-11-00-810-809).
(3) If the circuit breaker (2DL) is closed:
(a) On the P/BSW (3DL) connector do a check for 28VDC on the pin D1 ASM 301101.
(b) If there is no 28VDC, replace theC/B-ANTI-ICE/WING/CTL 2DL .
(c) Do the test in Para. 3.A.
(4) If there is 28VDC:
(a) With the P/BSW 3DL connected, and set to on, do a check for 28VDC at the relay anti-ice valve control, connector pin X (Ref. ASM 30-11/01).
(b) If there is no 28VDC, replace theP/BSW ANTI ICE/WING 3DL .
(c) Do the test in para. 3.A.
(5) If there is 28VDC:
(a) Replace the RELAY ANTI ICE VALVE CONTROL 5DL
(b) Do the test in Para. 3.A.
(6) If the fault continues:
(a) Replace the RELAY-GROUND TEST [4DL] .
(b) Do the test in Para. 3.A.
(7) If the fault continues:
(a) Do a check of the aircraft wiring ASM 301101 between:
(c) Do the test in Para. 3.A.
(1) If the test is not OK go to para (2).
If the test is OK:
(a) Do a check of the aircraft wiring from the relay anti-ice control 5DL to the LGCIU 1 and LGCIU 2. ASM 301101.
(b) Repair the unservicable wiring/connectors.
CAUTION:
MAKE SURE THAT YOU SET THE WING ANTI-ICE SYSTEM P/BSW TO OFF AFTER 30 SECONDS. THIS WILL PREVENT DAMAGE TO THE SLATS.
(c) Do the test in para 3.A. with the L/G simulated to shock absorbers extended AMM 32-69-00-860-001. (2) If the test in para. 3.A. is not OK:
(a) Do a check to see if the circuit breaker (2DL) is open, if it is open, do (Ref. TSM TASK 30-11-00-810-809).
(3) If the circuit breaker (2DL) is closed:
(a) On the P/BSW (3DL) connector do a check for 28VDC on the pin D1 ASM 301101.
(b) If there is no 28VDC, replace the
(c) Do the test in Para. 3.A.
(4) If there is 28VDC:
(a) With the P/BSW 3DL connected, and set to on, do a check for 28VDC at the relay anti-ice valve control, connector pin X (Ref. ASM 30-11/01).
(b) If there is no 28VDC, replace the
(c) Do the test in para. 3.A.
(5) If there is 28VDC:
(a) Replace the RELAY ANTI ICE VALVE CONTROL 5DL
(b) Do the test in Para. 3.A.
(6) If the fault continues:
(a) Replace the RELAY-GROUND TEST [4DL] .
(b) Do the test in Para. 3.A.
(7) If the fault continues:
(a) Do a check of the aircraft wiring ASM 301101 between:
- the circuit breaker (2DL) and the P/BSW (3DL)
- relay (3DL) and relay (5DL)
- relay (5DL) and relay (4DL)
- relay (4DL) connector pin A3 and pin X2 for ground
(c) Do the test in Para. 3.A.