D. Do this Test:

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the upper ECAM DU:
 - push the ELEC key.  - no message comes into view.
 2. In the AC power center 123VU: On the lower ECAM DU, on the ELEC page:
 - open the circuit breaker 2PU1.  - the TR 1 no longer supplies the DC 1 bus,
 - the DC 1 bus is supplied by the DC 2 bus through the DC BAT bus,

 - the DC ESS bus is supplied by the AC ESS bus through the ESS TR.

 3. In the AC power center 123VU:
 - close the circuit breaker 2PU1.
 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).

 「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 : ALL ∞∞24-60-00∞∞∞∞∞∞∞∞∞∞Page 241
 Aug 01/00R
 CES

 TASK 24-60-00-810-816

 Unwanted Warning from the DC ESS Busbar
 1. Possible Causes
_______________
 - wiring

 - C/B-SDAC/1 and 2/28VDC/ESS BUS (12WV)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power AMM 31-60-00-860-001 EIS Start Procedure ASM 31-54/08
 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 (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).

 B. Test
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the upper ECAM DU:
 - push the ELEC key to get the  - the DC ESS BUS FAULT warning comes ELEC page. into view.
 「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 : ALL ∞∞24-60-00∞∞∞∞∞∞∞∞∞∞Page 242
 Aug 01/00R
 CES

 4. Fault Isolation
_______________

 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU SDAC/1 AND 2/28VDC/ESS BUS 12WV F05
 B. If the test confirms the fault:
 - do a check of the status of the circuit breaker (12WV):
 (1) If the circuit breaker is closed:

 - do a check and repair the wiring from the 401PP busbar to the first branch point, through the circuit breaker (12WV) (Ref. ASM 31-54/08)

 (2) If the circuit breaker is open:

 - close it.
 (a) If it trips:
 - do a check of the wiring for short to ground from the circuit breaker (12WV) to the first branch point (Ref. ASM 31-54/08).
 1 If the wiring is not correct:
_ - repair it.
 2 If it is correct:
_
 - replace the C/B-SDAC/1 and 2/28VDC/ESS BUS (12WV).
 C. Do this test to make sure that the system operates correctly:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the upper ECAM display unit:
 - push the ELEC key to get the  - no message comes into view. ELEC page.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.
 (1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.

 (2) De-energize the aircraft electrical circuits
 (Ref. AMM TASK 24-41-00-862-002).
　
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