B. If the test gives the maintenance message CHECK WINDOWS WHC 2 SUPPLY:
- do a check of the status of the circuit breaker (4DG2).
(1) If the circuit breaker is closed:
- do a check for 115VAC at pin A/A of the WHC 2 (2DG2) (Ref. ASM 30-42/02).
(a) If there is 115VAC:
- replace the WHC-2 (2DG2), (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).
(b) If there is no 115VAC:
- do a check for a ground signal at pin A/G of the WHC 2 (2DG2). 1 If there is no ground signal:
_
- repair the wiring between the WHC 2 pin A/G and the ground terminal.
2 If there is a ground signal:
_
- do a check of the wiring between the WHC 2 pin B/G and the circuit breaker (4DG2).
a If there is no continuity:
_
- repair the above wiring. b If there is continuity:
_
- replace the circuit breaker (4DG2).
(2) If the circuit breaker is open:
- close the circuit breaker.
(a) If the circuit breaker trips again:
- replace the WHC-2 (2DG2).
1 If the fault continues:
_
- do a check for a short to ground at the wiring between the WHC 2 pin B/G and the circuit breaker (4DG2).
a If there is a short to ground:
_
- repair the related wiring. b If there is no short to ground:
_ - replace the C/B-ANTI ICE/WINDOWS/R (4DG2).
(b) If the circuit breaker stays closed and the fault continues:
- replace the WHC-2 (2DG2).
C. Do the operational test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-42-00∞∞∞∞∞∞∞∞∞∞Page 273
Aug 01/05R CES
Loss of the Output Discretes (Windshield)
1. Possible Causes
_______________
- WHC-1 (2DG1)
- wiring from the WHC 1 (2DG1) to the SDAC 1 (1WV1)
- wiring from the WHC 1 (2DG1) to the SDAC 2 (1WV2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 30-42-00-710-001 Operational Test of the Windshield Anti-Icing and Defogging AMM 30-42-34-000-001 Removal of the Window Heat Computer (WHC) (2DG1,2DG2). AMM 30-42-34-400-001 Installation of the Window Heat Computer (WHC) (2DG1,2DG2). ASM 30-42/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the windshield anti-icing and defogging (Ref. AMM TASK 30-42-00-710-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message CHECK SDAC-WINDSHIELD WHC 1 INTERFACE:
- replace the WHC-1 (2DG1), (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).
(1) If the fault continues:
- do a check and repair the wiring from the WHC 1 (2DG1) to the SDAC1 (1WV1) pin B/D to pin AA/10B and/or
- do a check and repair the wiring from the WHC 1 (2DG1) to the SDAC2 (1WV2) pin B/D to pin AA/10B (Ref. ASM 30-42/01).
B. Do the operational test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-42-00∞∞∞∞∞∞∞∞∞∞Page 274
Aug 01/05R CES
Loss of the Output Discretes (Windshield)
1. Possible Causes
_______________
- WHC-2 (2DG2)
- wiring from the WHC 2 (2DG2) to the SDAC 1 (1WV1)
- wiring from the WHC 2 (2DG2) to the SDAC 2 (1WV2)
2. Job Set-up Information
______________________
A. Referenced Information
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本文链接地址：A320 Trouble Shooting Manual 排故手册 除冰和排雨(78)
