「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A285
 Aug 01/05 CES

R  B. If the BITE test gives the message TEST PASSED: 
R  (1) Do the trouble shooting for chapter-32 CFDS messages related to the 
R  LGCIU 1. 
R  (2) If there are no CFDS messages related to the LGCIU 1: 
R  - do a check of the ground/flight status wiring for a short circuit 
R  or a short to ground between pin A/2C of the GCU 2 and pin B/10H of 
R  the LGCIU 1 (5GA1) (Ref. ASM 24-22/01). 
R  (a) If there is no continuity: 
R  - repair or replace as necessary. 
R  (b) If there is continuity: 
R  - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and 
R  (Ref. AMM TASK 24-22-34-400-001). 
R  1_  If the fault continues:
R  - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) 
R  and (Ref. AMM TASK 32-31-71-400-001). 
R  C. Do the test given in para. 3.

R TASK 24-20-00-810-880

R Failure of the Generator Control Unit 1 R 1. Possible Causes
_______________ R - GCU-1 (1XU1) 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 24-41-00-861-002 R R AMM 24-41-00-862-002 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 71-00-00-710-003 R AMM 71-00-00-710-028
R 3. Fault Confirmation
__________________
R A. Test 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 Energize the Aircraft Electrical Circuits from the APU De-energize the Aircraft Electrical Circuits Supplied from the External Power De-energize the Aircraft Electrical Circuits Supplied from the APU EIS Start Procedure EIS Stop Procedure Engine Automatic Start Engine Shutdown
R (1) Remove all AC and DC power from the GCU 1:
R - de-energize the aircraft electrical circuits from the APU (Ref. AMM
R TASK 24-41-00-862-002),
R - de-energize the aircraft electrical circuits from the external
R power (Ref. AMM TASK 24-41-00-862-002),
R - disconnect the batteries or open the GCU 1 circuit breaker (4XU1)
R to remove the 28VDC backup power-supply from the GCU 1.

R (2) Apply power to the GCU 1:
R - energize the aircraft electrical circuits from the APU (Ref. AMM
R TASK 24-41-00-861-002),
R - 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, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A287
 Aug 01/05 CES

R  (3) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002). 
R  (a) If the BITE test gives the message TEST FAILED: 
R  - push the line key adjacent to the TEST FAILED message. 
R  1 If the maintenance message GCU1 (1XU1) comes into view:_ 
R  - do the trouble shooting procedure given in the Para 4.A. 
R  (b) If the BITE test gives the message TEST PASSED: 
R  - stop the trouble shooting. 
R  4. Fault Isolation_______________ 
R  A. If the BITE test gives the maintenance message GCU1 (1XU1) or if the APU 
R  generator or the external power do not energize the aircraft electrical 
R  circuits: 
R  - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref. AMM 
R  TASK 24-22-34-400-001). 
R  B. 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 1 pushbutton switch (3XU1). 
R  (3) Do the operational test of the GAPCU (Ref. AMM TASK 24-41-00-740-
　
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