R (2) If there is no short circuit:
R - do a check of the feeders for a short to ground, a short circuit or
R an open circuit condition between terminals R, P, N of the BTC 2
R and the AC transfer bus (Ref. ASM 24-22/03).
R (a) If the feeders are not correct:
R - repair or replace the AC transfer busbars as necessary.
R (b) If the feeders are correct:
R - continues the trouble shooting.
R B. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION
R -------------------------------------------------------------------------------R 122VU ELEC/GCU/2 2XU2 T27
R C. Energize the aircraft electrical circuit from the generator 1 only.
R (1) Loosen and lower the nuts that attach the GCU 2 and pull it on its
R racks to disconnect the electrical connectors.
R (2) On the ELEC panel 35VU, push, release and push again the ELEC/GEN 1
R pushbutton switch (3XU2).
R (3) Start the engine 1 (Ref. AMM TASK 71-00-00-710-003).
R D. Do this procedure:
R - after five minutes, see if there is a trip.
R (1) If there is a trip:
R - stop the engine 1 (Ref. AMM TASK 71-00-00-710-028)
R - do the trouble shooting of the generator 1 channel (Ref. TASK 24-R 20-00-810-862).
「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, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page B209
Aug 01/05 CES
R (2) If there is no trip:
R - close the circuit breaker 2XU2 (remove the safety clip and tag).
R E. Do this operational test to make sure that the system operates correctly.
R (1) Aircraft Maintenance Configuration
R (a) Energize the aircraft electrical circuits
R (Ref. AMM TASK 24-41-00-861-002).
R (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
R (Ref. AMM TASK 31-60-00-860-001).
R (2) On the ELEC panel 35VU:
R - push, release and push again the GEN 2 pushbutton switch (3XU2).
R (3) Do the operational test of the GAPCU (Ref. AMM TASK 24-41-00-740-R 002).
R (4) Start the engine 2 (Ref. AMM TASK 71-00-00-710-003).
R (5) Do this test:
R -------------------------------------------------------------------------------R ACTION RESULT
R -------------------------------------------------------------------------------
R R R R On the ECAM control panel: - get the ELEC page. On the lower ECAM DU: - the correct electrical parameters of the GEN 2 are shown and the AC2 busbar is supplied by the GEN 2.
R 5. Close-up________
R A. Put the aircraft back to its initial configuration.
R (1) Stop the engine 2 (Ref. AMM TASK 71-00-00-710-028).
R (2) Do the EIS stop procedure
R (Ref. AMM TASK 31-60-00-860-002).
R (3) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY R potentiometers to OFF. R (4) De-energize the aircraft electrical circuits
R (Ref. AMM TASK 24-41-00-862-002).
「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, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page B210
Aug 01/05 CESR 3. Fault Confirmation
R TASK 24-20-00-810-890
R Overcurrent on the GEN 1 Because of a Failure of the BTC 1 Status Circuit
R 1. Possible Causes_______________
R - GCU-1 (1XU1)
R - BTC-1 (11XU1)
R - wiring
R 2. Job Set-up Information______________________
R A. Referenced Information
R -------------------------------------------------------------------------------
R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 24-20-00-810-918
R AMM 24-22-34-000-001
R AMM 24-22-34-400-001
R AMM 24-22-55-000-001
R AMM 24-22-55-400-002
R
R AMM 24-41-00-740-002
R ASM 24-22/02
__________________ R A. Test
Overload on the Electrical Network of the Generator 1
Removal of the GCU-1(2) (1XU1, 1XU2)
Installation of the GCU-1(2) (1XU1, 1XU2)
Removal of the Contactors (9XU1, 9XU2, 11XU1, 11XU2)
Installation of the Contactors (9XU1, 9XU2, 11XU1,
11XU2)
Operational Check of GAPCU via CFDS
R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R NOTE : If the CFDS message GEN1 OVERCURRENT + GCU1 (1XU1)/ BTC1
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