R (2) On the ELEC panel 35VU:
R - push, release and push again the GEN 1 pushbutton switch (3XU1).

R (3) Do the operational test of the GAPCU (Ref. AMM TASK 24-41-00-740-R 002).

R (4) Start the engine 1 (Ref. AMM TASK 71-00-00-710-003).

 「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 B200
 Aug 01/05 CES

R  (5) Do this test: 
R  -------------------------------------------------------------------------------
R  ACTION  RESULT 
R  -------------------------------------------------------------------------------
R  On the ECAM control panel:  On the lower ECAM DU: 
R  - get the ELEC page.  - the correct electrical parameters of 
R  the GEN 1 are shown and the AC1 
R  busbar is supplied by the GEN 1. 
R  5. Close-up________ 
R  A. Put the aircraft back to its initial configuration. 
R  (1) Stop the engine 1 (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).

R TASK 24-20-00-810-887

R Failure of the FAULT Light of the ELEC/GEN 2 Pushbutton Switch (3XU2) R 1. Possible Causes
_______________
R - GCU-2 (1XU2)
R - BOARD-ANN LT TEST & INTFC (10LP)
R - wiring

R 2. Job Set-up Information

______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-22-34-000-001 R AMM 24-22-34-400-001 R AMM 24-41-00-740-002 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 31-60-00-860-001 R AMM 31-60-00-860-002 R AMM 33-14-33-000-001 R R R AMM 33-14-33-400-001 R R R AMM 71-00-00-710-003 R AMM 71-00-00-710-028 R ASM 24-22/02
R 3. Fault Confirmation
__________________
R A. Job Set-up Removal of the GCU-1(2) (1XU1, 1XU2) Installation of the GCU-1(2) (1XU1, 1XU2) Operational Check of GAPCU via CFDS Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power EIS Start Procedure EIS Stop Procedure Removal of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) Installation of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) Engine Automatic Start Engine Shutdown
R (1) Energize the aircraft electrical circuits from the external power
R (Ref. AMM TASK 24-41-00-861-002).

R B. Test

R (1) If on the ELEC panel 35VU, the AVAIL legend of the ELEC/GEN 2
R pushbutton switch (3XU2) is on:
R - do the trouble shooting given in Para.4.A.

 「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 B202
 Aug 01/05 CES

R (2) If on the ELEC panel 35VU, the AVAIL legend of the ELEC/GEN 2
R pushbutton switch (3XU2) is off:
R - do the trouble shooting given in Para.4.B.

R 4. Fault Isolation

_______________
R A. If the test confirms the fault:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and (Ref. AMM
R TASK 24-22-34-400-001).

R B. If the test confirms the fault:
R - do a check of the wiring (Ref. ASM 24-22/02) for a short to ground
R between:

R . pin A/5G of the GCU 2 and pin A/25 of the annunciator light test and R interface board (10LP)

R . pin A/24 of the annunciator light test and interface board (10LP) and R pin A/5 of the diode module 2422VD

R . pin A/20 of the diode module 2422VD and pin A/15 of the diode module R 2420VD.

R (1) If there is a short to ground:
R - repair or replace as necessary.

R (2) If there is no short to ground:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and (Ref.
R AMM TASK 24-22-34-400-001).

R (3) If the fault continues:
R - replace the BOARD-ANN LT TEST & INTFC (10LP) (Ref. AMM TASK 33-14-R 33-000-001) and (Ref. AMM TASK 33-14-33-400-001).

R C. Do this operational test to make sure that the system operates correctly.
　
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