R (b) If the resistance values are in the specified limits:
R - do a check of the wiring (Ref. ASM 24-23/01) for a short to
R ground, a short circuit 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 . pins C/9, C/10, C/11 and pin C/7 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)
R and (Ref. AMM TASK 24-41-34-400-001).
R a_ If the fault continues:
R - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-R 001) and (Ref. AMM TASK 24-23-51-400-001).
R (2) If the CFDS message comes into view with the fault code 67:
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 (a) If the fault continues:
R - do a check of the wiring (Ref. ASM 24-23/01) for a short to
R ground, a short circuit 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 . pins C/9, C/10, C/11 and pin C/7 of the GAPCU.
R 1_ If the wiring is not correct:
R - repair or replace as necessary.
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R 2_ If the wiring is correct:
R - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001)
R and (Ref. AMM TASK 24-41-34-400-001).
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 24-23-00-810-816
R Failure of the Status Circuit of the ELEC/APU GEN Pushbutton Switch R 1. Possible Causes
_______________
R - P/BSW-ELEC/APU GEN (2XS)
R - GAPCU (24XG)
R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-41-00-740-002 Operational Check of GAPCU via CFDS
R AMM 24-41-34-000-001 Removal of the Ground Auxiliary Power Control Unit
R (GAPCU) (24XG)
R AMM 24-41-34-400-001 Installation of the Ground Auxiliary Power Control
R Unit (GAPCU) (24XG)
R ASM 24-23/02
R 3. Fault Confirmation__________________
R A. Test
R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R 4. Fault Isolation
_______________
R A. Table of the circuit breakers used in this procedure:
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 122VU ELEC/GAPCU 17XG W24
R B. If the BITE test gives the maintenance message PB SW ELEC GEN APU (2XS)/ R GAPCU (24XG):
R NOTE : After you do the trouble shooting for this fault, open and close
____ R the circuit breaker 17XG to remove all 28VDC power supply from the R GAPCU.
R - do a check of the wiring (Ref. ASM 24-23/02) for an open circuit or a R short to ground between:
R . pin A/1C of the GAPCU and pin A/D3 of the ELEC/APU GEN pushbutton R switch
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R . pin A/4E of the GAPCU and pin A/D2 of the ELEC/APU GEN pushbutton
R switch
R . pin A/2G of the GAPCU and pin A/D1 of the ELEC/APU GEN pushbutton
R switch.
R (1) If the wiring is not correct:
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(18)
