R (1) If the wiring is not correct:
R - repair or replace as necessary.
R (2) If the wiring is correct:
R - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref.
R AMM TASK 24-41-34-400-001).
「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 : 401-499, ∞∞24-23-00∞∞∞∞∞∞∞∞∞∞Page 245
Aug 01/05 CES
R B. Make sure that the aircraft electrical circuits operate correctly in APU
R configuration.
R (1) Energize the aircraft electrical circuits from the APU (Ref. AMM TASK
R 24-41-00-861-002).
R (2) Let the APU generator operate for five minutes to make sure that it
R operates correctly.
R (3) De-energize the aircraft electrical circuits from the APU (Ref. AMM
R TASK 24-41-00-862-002).
R **ON A/C 106-149, 229-299, 303-399, 401-499,
TASK 24-23-00-810-822
Failure of the Neutral-To-Phase System of the APU Generator or the GAPCU
1. Possible Causes
_______________
- GEN-APU (8XS)
- GAPCU (24XG)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 24-23-51-000-001 Removal of the APU Generator 8XS
AMM 24-23-51-400-001 Installation of the APU Generator 8XS
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
APU AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the APU AMM 24-41-34-000-001 Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) AMM 24-41-34-400-001 Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) ASM 24-23/01
3. Fault Confirmation
__________________
A. Test
Not applicable.
NOTE : As the APU GEN was set to OFF because of a true failure, the fault
____
confirmation is not necessary.
4. Fault Isolation
_______________
A. If the fault symptom is identified by the CFDS message GEN APU (8XS)/ GAPCU (24XG)/ WRG: GEN APU FEEDER and the upper ECAM-DU warning APU GEN FAULT:
- do a check of the resistance of the neutral-to-phase connections (Ref. ASM 24-23/01) of the APU generator between: . terminal T1 and N (9.35 milliohms plus or minus 1.25 milliohms) . terminal T2 and N (9.35 milliohms plus or minus 1.25 milliohms) . terminal T3 and N (9.35 milliohms plus or minus 1.25 milliohms).
「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 : 106-149, 229-299, 303-399, 401-499, ∞∞24-23-00∞∞∞∞∞∞∞∞∞∞Page 247
Aug 01/05 CES
(1) If the resistance values are out of the specified limits:
- replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).
(2) If the resistance values are in the specified limits:
- do a check of the wiring of the APU generator neutral-feeder for an open circuit or a high resistance between the terminal N of the APU generator and the airframe ground (Ref. ASM 24-23/01).
(a) If the wiring is not correct:
- repair or replace the neutral feeder as necessary.
(b) If the wiring is correct:
- replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. AMM TASK 24-41-34-400-001).
1_ If the fault continues:
- replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001)
and (Ref. AMM TASK 24-23-51-400-001).
B. Make sure that the aircraft electrical circuits operate correctly in APU configuration.
(1) Energize the aircraft electrical circuits from the APU (Ref. AMM TASK 24-41-00-861-002).
(2) Let the APU generator operate for five minutes.
(3) De-energize the aircraft electrical circuits from the APU (Ref. AMM TASK 24-41-00-862-002).
TASK 24-23-00-810-823 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 电源 3(22)
