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  24-41/01 

R 3. Fault Confirmation
__________________ R A. Test
Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R (1) Energize the Aircraft Electrical Circuits from the external power R (Ref. AMM TASK 24-41-00-861-002).
R 4. Fault Isolation
_______________
R A. If it is not possible to connect the external power source to the R aircraft electrical network and if the fault symptom is identified by the R CFDS message WRG: EXT PWR FEEDER/WRG: POR/GAPCU (24XG): R - do a check of the external power feeders (Ref. ASM 24-41/01) for a R correct phase connection between:
R . terminal A of the external power receptacle (20XG) and terminal K of R the EPC (3XG)

R . terminal B of the external power receptacle and terminal L of the EPC

R . terminal C of the external power receptacle and terminal M of the R EPC.

R (1) If the feeders are not correct:
R - connect the feeders as necessary to get the correct phase sequence.

 「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, ∞∞24-41-00∞∞∞∞∞∞∞∞∞∞Page 242
 Aug 01/05 CES

R  (2) If the feeders are correct: 
R  - do a check of the Point-Of-Regulation (POR) sense wiring (Ref. ASM 
R  24-41/01) for a correct phase connection between: 
R  . terminal J of the EPC (3XG) and pin B/15J of the GAPCU (phase A) 
R  . terminal H of the EPC and pin B/14J of the GAPCU (phase B) 
R  . terminal G of the EPC and pin B/13J of the GAPCU (phase C). 
R  (a) If the wiring is not correct: 
R  - connect the wiring as necessary to get the correct phase 
R  sequence. 
R  (b) If the wiring is correct: 
R  - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and 
R  (Ref. AMM TASK 24-41-34-400-001). 
R  (c) If the fault continues: 
R  - replace the external power source. 
R  B. Make sure that the aircraft electrical circuits operate correctly in 
R  external power configuration. 
R  (1) Energize the Aircraft Electrical Circuits from the external power 
R  (Ref. AMM TASK 24-41-00-861-002). 
R  (2) De-energize the aircraft electrical circuits from the external power 
R  (Ref. AMM TASK 24-41-00-862-002).

R TASK 24-41-00-810-823

R  Failure of the External Power Feeders and External Power POR-Wiring 
R  1. Possible Causes_______________ 
R  - GAPCU (24XG) 
R  - feeders 
R  - wiring 
R  - external power 
R  2. Job Set-up Information______________________ 
R  A. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE  DESIGNATION 
R  -------------------------------------------------------------------------------

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  24-41/01 

R 3. Fault Confirmation
__________________ R A. Test
Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R  (1) Energize the aircraft electrical circuits from the external power 
R  (Ref. AMM TASK 24-41-00-861-002). 
R  4. Fault Isolation_______________ 
R  A. If it is not possible to connect the external power source to the 
R  aircraft electrical network and if the fault symptom is identified by the 
R  CFDS message WRG: EXT PWR FEEDER/WRG: POR + GAPCU (24XG): 
R  - stop the external power source, 
　
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