R (1) If there is 28VDC:
R - do the trouble shooting of the pin F for a short to 28VDC between
R the plug and the external power source and repair as necessary.
「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 239
Aug 01/05 CES
R (2) If there is no 28VDC:
R - do a check of the wiring of the external power interlock-control
R (Ref. ASM 24-41/01) for a short circuit or a short to 28VDC
R between:
R . pin B/12E of the GAPCU and pin F of the external power receptacle R (20XG)
R . pins F and E of the external power receptacle.
R (a) If the wiring is not correct:
R - repair or replace the wiring as necessary
R - replace the RCPT-EXT PWR (20XG) (Ref. AMM TASK 24-41-51-000-R 001) and (Ref. AMM TASK 24-41-51-400-001) as necessary.
R (b) If the wiring is correct:
R - do a check of the Point-Of-Regulation (POR) sense wiring (Ref.
R ASM 24-41/01) for a correct phase connection between:
R . terminal J of the EPC (3XG) and pin B/15J of the GAPCU (phase R 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 1_ If the wiring is not correct:
R - connect the wiring as necessary to get the correct phase
R sequence.
R 2_ If the wiring is correct:
R - do a check of the external power feeders (Ref. ASM 24-41/01)
R for a correct phase connection between:
R . terminal A of the external power receptacle (20XG) and R terminal K of the EPC (3XG)
R . terminal B of the external power receptacle and terminal L R of the EPC
R . terminal C of the external power receptacle and terminal M R of the EPC.
R a_ If the feeders are not correct:
R - connect the feeders as necessary to get the correct phase
R sequence.
R b_ If the feeders are 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 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).
「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 240
Aug 01/05 CESR (2) De-energize the aircraft electrical circuits from the external power R (Ref. AMM TASK 24-41-00-862-002).
R TASK 24-41-00-810-822
R Failure of the External Power Feeders or 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
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