- wiring

 - CB-ELEC/CNTOR/ESS/DC BUS/TIE R - TIMER (33XE)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 24-35-55-000-001 Removal of the Contactor (1PC1, 1PC2)
 AMM 24-35-55-400-001 Installation of the Contactor (1PC1, 1PC2)
 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
 AMM 31-60-00-860-002 EIS Stop Procedure
 ASM 24-35/01
 ASM 24-35/02
 AWM 24-35-03

 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

 (1) Do this test:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
On the ECAM control panel:  On the lower ECAM display unit:
 - push the ELEC key to get the ELEC  - the TR1 and the TR2 supply the DC1 page. and DC2 busbars.
 - the line between DC BAT BUS and DC ESS BUS comes into view.
 (2) If the test confirms the fault, do the fault isolation given in step
 B.
 C. If the test is correct, do this test:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
On the panel 125VU(124VU): On the upper ECAM display unit: - open the circuit breaker 4PU1(2). - the TR1(2) FAULT indication comes into view . On the lower ECAM display unit:
 - the TR1(2) no longer supplies the DC1(2) busbar,

 - the DC2(1) busbar supplies the DC1(2) busbar through the DC BAT busbar,

 - the AC ESS busbar supplies the DC ESS busbar through the ESS TR.

 4. Fault Isolation
_______________
 A. If the test confirms the fault:
 - do a check for 28VDC between pins B/3 and B/5 of the DC ESS BUS SPLY contactor (4PC).
 (1) If there is 28VDC:

 - replace the CNTOR-DC ESS BUS SUPPLY (4PC) (Ref. AMM TASK 24-35-55-000-001) and (Ref. AMM TASK 24-35-55-400-001).

 (2) If there is no 28VDC:

 - do a check of the status of the circuit breaker (3PC).
 (a) If the circuit breaker is closed:
 - do a check for 28VDC between pins B/3 and B/5 of the DC NORM BUS 1 switching contactor (1PC1).
 「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 ∞∞24-35-00∞∞∞∞∞∞∞∞∞∞Page 202
 Feb 01/01R CES

 1 If there is 28VDC:
_
 - replace the CNTOR-DC NORM BUS 1 SWITCHING (1PC1) (Ref. AMM TASK 24-35-55-000-001) and (Ref. AMM TASK 24-35-55-400-001).
 a If the fault continues:
_
 - do a check and repair the wiring: . between the circuit breaker (3PC) and pin B/3 of the contactor (4PC) . then between pin B/5 of the contactor (4PC) and the ground point or terminal block (Ref. ASM 24-35/01) (Ref. AWM 24-35-03).
 2 If there is no 28VDC:
_
 - do a check and repair the wiring between the circuit breaker (9PC) and pin B/3 of the DC NORM BUS 1 switching contactor (1PC1) (Ref. ASM 24-35/02).
 (b) If the circuit breaker (9PC) is open:
 - close it.
 1 If the circuit breaker trips:
_
 - do a check of the wiring for short to ground between the circuit breaker (3PC) and pin B/3 of the DC ESS BUS SPLY contactor (4PC) (Ref. ASM 24-35/01).
 a If the fault continues:
_
 - replace the CB-ELEC/CNTOR/ESS/DC BUS/TIE.
 B. If the TR1, TR2 and ESS TR supply their respective busbars (DC1, DC2, DC
 ESS): R - replace the TIMER (33XE).
 C. Do the test given in Para. 3 and make sure that the normal configuration comes 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).
　
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