R  **ON A/C 401-499, 
R R R  C. If the test confirms the fault: - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref. AMM TASK 24-22-34-400-001). 
R R R R R R R R R R  D. If the test confirms the fault: - do a check and repair the wiring (Ref. ASM 31-54/03) between: . the pin A/8F of the GCU 1 (1XU1) and the pin B/10G of the SDAC 1 (1WV1) . the pin A/7F of the GCU 1 (1XU1) and the pin B/10H of the SDAC 1 (1WV1) . the pin A/8J of the GCU 1 (1XU1) and the pin B/10G of the SDAC 2 (1WV2) . the pin A/8H of the GCU 1 (1XU1) and the pin B/10H of the SDAC 2 (1WV2). 
R  **ON A/C ALL
 E. Do this test to make sure that the system operates correctly:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
On the ECAM control panel: - push the ELEC key to get the ELEC page.  On the lower ECAM DU:- the ELEC page comes into view.In the GEN 1 box: - the normal electrical parameters come into view.
 5. Close-up________
 A. Put the aircraft back to its initial configuration.
 (1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
 (2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

 TASK 24-22-00-810-806

 External Power Voltage Incorrect or Lost and Frequency Lost
 1. Possible Causes_______________
R  - EGIU-1 (22XU1) - GAPCU (24XG) - wiring - C/B EXT PWR/EGIU1/115VAC (23XG)
 2. Job Set-up Information______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
R R R R  AMM AMM AMM AMM AMM AMM AMM AMM ASM ASM  24-22-33-000-001 24-22-33-400-002 24-41-00-861-002 24-41-00-862-002 24-41-34-000-001 24-41-34-400-001 31-60-00-860-001 31-60-00-860-002 24-41/0131-54/03 Removal of the EGIU-1(2) (22XU1, 22XU2)Installation of the EGIU-1(2) (22XU1, 22XU2)Energize the Aircraft Electrical Circuits from the External PowerDe-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)EIS Start ProcedureEIS Stop Procedure
 3. Fault Confirmation__________________
 A. Job Set-up
 (1) Aircraft Maintenance Configuration
 (a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
 (b) Do the EIS start procedure (Lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).

 B. Test

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the lower ECAM DU:
 - push the ELEC key to get the  - amber crosses replace the VAC
 ELEC page.  indication or the indication shows amber or amber crosses replace the frequency indication.
 4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------
PANEL DESIGNATION  IDENT. LOCATION
 -------------------------------------------------------------------------------
123VU EXT PWR/EGIU1/115VAC  23XG AA07
 B. If the test confirms the fault:
 - replace the EGIU-1 (22XU1) (Ref. AMM TASK 24-22-33-000-001) and (Ref. AMM TASK 24-22-33-400-002).
 (1) If the fault continues:
 - do a check of the position of the circuit breaker (23XG).
 (a) If the circuit breaker (23XG) is open:
 - close it.
 1 If the circuit breaker trips:
_
 - do a check for a short to ground between the circuit breaker EXT PWR/EGIU1/115VAC (23XG) and the pin AB/1D of the EGIU1 (22XU1) (Ref. ASM 24-41/01),

 - if there is a short to ground: .repair the wiring,

 - if there is no short to ground: .replace the C/B EXT PWR/EGIU1/115VAC (23XG).

 (b) If the circuit breaker (23XG) is closed:
 - do a check and repair the wiring between the circuit breaker EXT PWR/EGIU1/115VAC (23XG) and the pin AB/1D of the EGIU1 (22XU1) (Ref. ASM 24-41/01).
　
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