R . pins C/9, C/10, C/11 and pin C/7 of the GAPCU.
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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 TASK 24-23-00-810-811
R Failure of the APU Generator PMG-Stator or the Exciter Field or its Wiring to R the GAPCU R 1. Possible Causes
_______________
R - GEN-APU (8XS) R - GAPCU (24XG) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-23-51-000-001 R AMM 24-23-51-400-001 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 24-41-34-000-001 R R AMM 24-41-34-400-001 R R ASM 24-23/01
R 3. Fault Confirmation
__________________
R A. Test
R Not applicable.
Removal of the APU Generator 8XS Installation of the APU Generator 8XS Energize the Aircraft Electrical Circuits from the APU De-energize the Aircraft Electrical Circuits Supplied from the APU Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R NOTE : As the APU GEN was set to OFF because of a true failure, the fault
____ R confirmation is not necessary.
R 4. Fault Isolation
_______________
R CAUTION : BEFORE YOU START THE CHECK OF IDG WIRING THAT INCLUDES CONNECTORS,
_______ R EXAMINE EACH CONNECTOR TO MAKE SURE THAT THERE IS NO OIL IN IT. R IF YOU FIND OIL, CLEAN THE CONNECTOR AND CONNECT IT AGAIN. R IF THE FAILURE CONTINUES, DO THE TROUBLE SHOOTING PROCEDURE AS R GIVEN BELOW.
R A. If the fault symptom is identified by the CFDS message GAPCU (24XG)/GEN R APU (8XS) PMG and the upper ECAM-DU warning APU GEN FAULT: R - do a check of the resistance of the APU generator exciter-field between R pins A/9 and A/10 of the APU generator (7.67 ohms plus or minus 0.73 R ohms) (Ref. ASM 24-23/01).
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R (1) If the resistance values are out of the specified limits:
R - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and
R (Ref. AMM TASK 24-23-51-400-001).
R (2) If the resistance values are in the specified limits:
R - do a check of the resistance of the APU generator PMG-stator (Ref.
R ASM 24-23/01) between:
R . pins A/12 and A/13 of the APU generator (0.868 ohm plus or minus
R 0.156 ohm)
R . pins A/12 and A/14 of the APU generator (0.868 ohm plus or minus
R 0.156 ohm)
R . pins A/13 and A/14 of the APU generator (0.868 ohm plus or minus
R 0.156 ohm).
R (a) If the resistance values are out of the specified limits:
R - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and
R (Ref. AMM TASK 24-23-51-400-001).
R (b) If the resistance values are in the specified limits:
R - do a check of the wiring for a short to ground, a short circuit
R or an open circuit between:
R . pin A/12 of the APU generator and pin C/10 of the GAPCU
R . pin A/13 of the APU generator and pin C/11 of the GAPCU
R . pin A/14 of the APU generator and pin C/9 of the GAPCU
R . pin C/7 and pins C/10, C/11 and C/9 of the GAPCU
R . pin A/9 of the APU generator and pin C/12 of the GAPCU
R . pin A/10 of the APU generator and pin C/13 of the GAPCU
R . pin C/7 and pins C/12, C/13 of the GAPCU.
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)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(14)
