4. Fault Isolation
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A. If the test gives the ELEC AC ESS BUS FAULT warning on the upper ECAM display unit even if the EIS operates correctly:
- do a check of the status of the AC ESS BUS/MONG/SPLY circuit breaker (2XH).
(1) If the circuit breaker is closed:
- replace the RELAY-BUS 4XP CTL (3XH).
(a) If the fault continues:
- do a check and repair the wiring between: . the circuit breaker (2XH) and the pin A/X of the relay (3XH) . the pin A/Z of the relay (3XH) and the ground . the pin A/A of the relay (3XH) and the pins D/5E of the SDAC1 and 2 . the pin A/1 of the relay (3XH) and the ground (Ref. ASM 24-52/01).
(2) If the circuit breaker is open:
- close it.
(a) If it trips:
- replace the RELAY-BUS 4XP (3XH)
1 If the fault continues:
_
- do a check ot the wiring for short to ground between the pin A/X of the BUS 4XP control relay (3XH) and the circuit breaker (2XH) (Ref. ASM 24-52/01).
a If the wiring is not correct:
_ - repair it.
b If the wiring is correct:
_
- replace the C/B-AC ESS BUS/MONG/SPLY (2XH).
B. Do this test to make sure that the system operates correctly:
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the lower ECAM display unit:
- push the ELEC key to get the - the normal configuration comes into
ELEC page. view. On the upper ECAM display unit:
- the ELEC AC ESS BUS FAULT warning does not come 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 ∞∞24-50-00∞∞∞∞∞∞∞∞∞∞Page 209
Feb 01/98 CES
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).
TASK 24-50-00-810-804
Failure of the AC Essential Generation Circuit
1. Possible Causes
_______________
- CNTOR-AC ESS BUS SWITCHING (3XC)
- CNTOR-AC ESS BUS SWITCHING (15XE)
- wiring
- GLC-EMER (2XE)
- RELAY-EMER CONDITION (12XE)
- P/BSW-ELEC/AC ESS FEED (11XC)
- C/B AC ESS/BUS ON/BUS1 (1XC)
- C/B-CNTOR 3XC NORM SUPPLY (4XC)
- RELAY-BUS 4XP CTL (3XH)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 24-24-55-000-001 Removal of the Emergency Generator Line Contactor
R (EMER GLC) (2XE) AMM 24-24-55-000-002 Removal of the AC ESS BUS Contactor (15XE) AMM 24-24-55-400-001 Installation of the Emergency Generator Line Contactor (EMER GLC) (2XE) AMM 24-24-55-400-002 Installation of the AC ESS BUS Contactor (15XE) AMM 24-25-55-000-001 Removal of the AC Essential Bus Switching Contactor (3XC) AMM 24-25-55-400-001 Installation of the AC Essential Bus Switching Contactor (3XC) 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 24-25/01 ASM 24-52/01
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. Test
Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
(1) If the upper ECAM display unit and the Captain PFD do not operate, do the trouble shooting below:
4. Fault Isolation
_______________
A. If the test confirms the fault:
- release the ELEC/AC ESS FEED pushbutton switch (11XC).
(1) If the fault disappears:
- do a check of the status of the CNTOR 3XC NORM SPLY circuit breaker (4XC).
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