- the AC ESS BUS SHED indication comes into view.
On the panel 11VU:
- the MCDU1 stays off.
On the panel 35VU:
- the IDG1, IDG2, GEN1, GEN2, BUS TIE and GALLEY pushbutton switches do not come on.
- do a check of the status of the circuit breaker (1XH).
(1) If the circuit breaker is closed:
- replace the CNTOR-AC SHED ESS BUS (8XH) (Ref. AMM TASK 24-52-55-000-001) and (Ref. AMM TASK 24-52-55-400-001).
(a) If the fault continues:
- replace the RECTIFIER-AC SHED ESS BUS CNTOR (9XH) (Ref. AMM TASK 24-52-51-000-001) and (Ref. AMM TASK 24-52-51-400-001).
「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 ∞∞24-50-00∞∞∞∞∞∞∞∞∞∞Page 205
May 01/03 CES (b) If the fault continues:
- do a check and repair the wiring between: . the circuit breaker (1XH) and the pin A/3 of the rectifier (9XH) . the pin A/2 of the AC SHED ESS BUS contactor rectifier (9XH) and the ground . the pin A/A of the rectifier (9XH) and the pin A/Z of the AC SHED ESS BUS contactor (8XH) . the pin A/X of the contactor (8XH) and the pin A/Z of the rectifier (9XH) . the pins A/1, A/5, A/7 of the contactor (8XH) and the first branch point . the pins A/2, A/6, A/8 of the contactor (8XH) and the first branch point (Ref. ASM 24-52/01).
(2) If the circuit breaker is open:
- close it.
(a) If it trips:
- do a check of the wiring for short to ground between the circuit breaker (1XH) and the pin A/3 of the rectifier (9XH), through the relay (16XE) and the contactor (2XB) (Ref. ASM 24-52/01).
1 If the wiring is not correct:
_ - repair it.
2 If the wiring is correct:
_ - replace the C/B-CNTOR SPLY (1XH).
R 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.
2. On the panel 11VU, on the MCDU1: On the panel 11VU:
- Adjust the brightness of the - the MCDU1 is ON.
MCDU screen.
3. On the panel 25VU: On the 35VU:
- set the ANN LT switch to TEST. - the annunciators come on with maximum brightness.
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.
R (2) On the MCDU1, Fully decrease the brightness of the MCDU screen (display off).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
TASK 24-50-00-810-803
Unwanted Warning from the AC Essential Busbar
1. Possible Causes
_______________
- RELAY-BUS 4XP CTL (3XH)
- wiring
- RELAY-BUS 4XP (3XH)
- C/B-AC ESS BUS/MONG/SPLY (2XH)
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 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
(1) Do the EIS start procedure to make sure that the EIS operates correctly (Ref. AMM TASK 31-60-00-860-001).
(2) Do this test:
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ECAM control panel: On the upper ECAM display unit:
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