(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 226
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 CES  TASK 24-60-00-810-812

 Failure of the DC BUS TIE (Loss of the Connection between the DC BUS 1, DC BAT BUS and DC BUS 2)
 1. Possible Causes
_______________
 - RELAY-SWTG SPLY/TR1 FAULT (8PC1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-32-00-710-001 Operational Test of the DC Generation Switching 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 24-35/02
 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).

 「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 227
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 CES  B. Test

 (1) Do this test:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
On the ECAM control panel:  On the upper ECAM display unit:
 - push the ELEC key to get the ELEC  - the ELEC TR1 FAULT, ELEC DC BUS 1
 page.  FAULT and ELEC DC BAT BUS FAULT
 warnings come into view.

 On the lower ECAM display unit:
 - the DC1 and DC BAT indications come on amber

 - the line between the DC 2 and DC BAT busses goes off

 - the line between the DC 1 and DC BAT busses goes off

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

 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
122VU ELEC/TR1/FAULT/DC BUS TIE/CONFIG  7PC1 W29
 B. If the test confirms the fault:
 - replace the RELAY-SWTG SPLY/TR1 FAULT (8PC1).
 (1) If the fault continues:
 - do a check of the status of the circuit breaker (7PC1).
 (a) If the circuit breaker is closed:
 - do a check and repair the wiring between: . the circuit breaker (7PC1) and the pins A/X1 and A/B2 of the relay (8PC1) . the pin A/B1 of this relay and the pins B/3 of the contactors (1PC1) and (1PC2), through the relays (20XN1, 20XN2) and the contactor (4PC) . the pin B/5 of the contactors (1PC1) and (1PC2) and the ground (Ref. ASM 24-35/02).
 「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 228
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 CES

 (b) If the circuit breaker is open:
 - close it.
 1_ If it trips:
 - do a check of the wiring for short to ground between the
 circuit breaker (7PC1) and the pins A/X1 and A/B2 of the
 relay (8PC1) (Ref. ASM 24-35/02).

 C. Do the operational test of the DC generation switching (Ref. AMM TASK 24-32-00-710-001).
 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).

 「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 229
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 CES

 TASK 24-60-00-810-813

 Loss of DC Busbars and DC Generation
 1. Possible Causes
　
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