(2) De-energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-862-002).
TASK 24-41-00-810-828
Failure of the External Power or the Phase A of the POR Sense Wiring
1. Possible Causes
_______________
- GAPCU (24XG)
- external power
- wiring
- feeders
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 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 24-41/01
3. Fault Confirmation
__________________
A. Test
(1) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
123VU GND/PWR/PROT 2XG AB07 B. If the external power does not energize the aircraft electrical circuits:
- repair or replace the external power.
(1) If the fault continues:
- do a check of the status of the GND/PWR/PROT circuit breaker (2XG).
(a) If the circuit breaker is open:
- close it.
(b) If the circuit breaker is closed:
1_ If the circuit breaker trips:
- do a check and repair the Point-Of-Regulation (POR) sense
wiring of the external power (Ref. ASM 24-41/01) for a short
to ground or a short circuit between pin A2 of the
GND/PWR/PROT circuit breaker (2XG) and pin B/15J of the
GAPCU.
- do a check of the Point-Of-Regulation (POR) sense wiring (Ref. ASM 24-41/01) for an open circuit or a short circuit between pin A/J of the EPC (3XG) and pin B/15J of the GAPCU.
1 If the wiring is not correct:
_ - repair or replace as necessary.
2 If the wiring is correct:
_
- do a check of the external power feeders (Ref. ASM 24-41/01) for an open circuit, a short circuit or a short to airframe between pin A of the external power receptacle (20XG) and pin A/K of the EPC (3XG).
a If the feeders are not correct:
_
- repair or replace as necessary.
b If the feeders are correct:
_
- replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. AMM TASK 24-41-34-400-001).
C. Test
(1) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).
(2) De-energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-862-002).
TASK 24-41-00-810-829
Failure of the External Power Interlock-Wiring
1. Possible Causes
_______________
- GAPCU (24XG)
- external power
- external power plug
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 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 24-41/01
3. Fault Confirmation
__________________
A. Test
(1) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).
4. Fault Isolation
_______________
A. If the test confirms the fault:
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(112)
