_______________
A. If the test gives the maintenance message EIU - 28V, ECU:
- do a check of the status of the circuit breaker (2KS1).
(1) If the circuit breaker is closed:
- disconnect the connector J1 from the ECU (4000KS) and do a check for 28VDC at pins J1/13 with the FADEC GND PWR pushbutton switch released (the ON legend is on) (Ref. ASM 73-25/05).
(a) If there is 28VDC:
- replace the EIU-1 (1KS1) (the most possible failure is the EIU 28V relay) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040)
- replace the ECU (4000KS) (the most possible failure is an ECU diode) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(b) If there is no 28VDC:
- do a check for 28VDC at EIU 1 (1KS1) pin AC/11 (Ref. ASM 73-25/05).
1_ If there is no 28VDC:
- do a check for open or short to ground at the aircraft
wiring from the circuit breaker (2KS1) to EIU 1 (1KS1) pin
AC/11.
a If there is a short to ground:
_ - repair the above wiring.
b If there is no short to ground:
_ - replace the C/B-ENGINE/1/FADEC A/AND EIU 1 (2KS1).
2 If there is 28VDC:
_
- do a check for open or short to ground at the harness J1 between the EIU 1 (1KS1) and the ECU (4000KS), pin AC/7 to pin J1/13. Replace the harness J1 if necessary (Ref. ASM 73-25/05).
3 If the fault continues:
_
- make sure that there is no ground signal at EIU 1 (1KS1) pin AA/5B (Ref. ASM 73-25/08).
(c) If the fault continues:
- replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
F 『 EEFF : ALL E ∞∞73-25-00∞∞∞∞∞∞∞∞∞∞Page 295
E E Aug 01/05 ERE
ECES E 56 E E E (2) If the circuit breaker (2KS1) is open:
F 『
E C F M E
E E
- close the circuit breaker.
(a) If the circuit breaker trips:
- replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040)
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(b) If the fault continues:
- do a check for a short to ground at the harness J1 between the EIU 1 (1KS1) and the ECU (4000KS), pin AC/7 to pin J1/13.
1 If there is a short to ground:
_ - replace the harness J1.
2 If there is no short to ground:
_
- do a check for a short to ground at the aircraft wiring between EIU 1 (1KS1) pins AC/11 and the circuit breaker (2KS1).
a If there is a short to ground:
_ - repair the above wiring.
b If there is no short to ground:
_ - replace the C/B-ENGINE/1/FADEC A/AND EIU 1 (2KS1).
B. Do the test given in Para. 3.B.
F 『 EEFF : ALL E ∞∞73-25-00∞∞∞∞∞∞∞∞∞∞Page 296
E E Aug 01/05 ERE
ECES TASK 73-25-00-810-910
F 『
E C F M E
E E
E 56 E
E E
Loss of the 28VDC Power Supply of the ECU on the Engine 2
1. Possible Causes
_______________
- EIU-2 (1KS2)
- ECU (4000KS)
- aircraft wiring
- C/B-ENGINE/2/FADEC A/AND EIU 2 (2KS2)
- harness J1
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU)(4000KS) AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with
Engine Motoring) ASM 73-25/05 ASM 73-25/08
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/2/FADEC A/AND EIU 2 2KS2 A05
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320 Trouble Shooting Manual 排故手册 发动机燃油和控制 2(65)
