* RELAY-EMER CONDITION (12XE)
* CNTOR-AC ESS BUS SWITCHING (15XE) (Ref. AMM TASK 24-24-55-000-002) and (Ref. AMM TASK 24-24-55-400-002).
* CNTOR-AC ESS BUS SWITCHING (3XC) (Ref. AMM TASK 24-25-55-000-001) and (Ref. AMM TASK 24-25-55-400-001). . the pin B/L of the contactor (3XC) and the ground, through the P/BSW-ELEC/AC ESS FEED (11XC).
b If there is not 115VAC:
_
- do a check of the status of the AC ESS/BUS ON/BUS 1 circuit breaker (1XC).
c If it is closed:
_
- do a check and repair the wiring between the pins A2, B2, C2 of the circuit breaker (1XC) and the pins L1, L2, L3 of the contactor (3XC), then from the pin L3 of the
「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 212
Feb 01/98 CES contactor (3XC) to the pin 1 of the circuit breaker (4XC) (Ref. ASM 24-25/01).
d If the circuit breaker (1XC) is open:
_ - close it.
e If it trips:
_
- do a check of the wiring for short to ground between: . the pins A2, B2, C2 of the circuit breaker (1XC) and the pins L1, L2, L3 of the contactor (3XC) . then between the pin L3 of the contactor (3XC) and the pin 1 of the circuit breaker (4XC) (Ref. ASM 24-25/01).
f If the fault continues:
_
- replace the C/B AC ESS/BUS ON/BUS1 (1XC).
(b) If the circuit breaker (4XC) is open:
- close it.
1 If it trips:
_
- do a check of the wiring for short to ground between respectively: . the pin 2 of the circuit breaker (4XC) and the pin B/R of the contactor (3XC) . the pin 2 of the circuit breaker (4XC) and the pin B/K of the contactor (3XC), through all the components given in Para. 4.A.(1)(a)2_a_ (Ref. ASM 24-25/01).
a If the wiring is not correct:
_ - repair it.
b If the wiring is correct:
_
- replace the C/B-CNTOR 3XC NORM SUPPLY (4XC).
(2) If the fault continues:
- replace the RELAY-BUS 4XP CTL (3XH).
(a) If the fault continues:
- replace the RELAY-EMER CONDITION (12XE).
(b) If the fault continues:
- replace the P/BSW-ELEC/AC ESS FEED (11XC).
(c) If the fault continues:
- do a check of the wiring for short to ground between the C/B (2XH) and the pin A/X of the relay (3XH) (Ref. ASM 24-52/01).
1 If the wiring is not correct:
_ - repair it.
「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 213
Feb 01/98 CES B. Do this test to make sure that the system operates correctly:
2_ If the wiring is correct:
- do a check and repair the wiring between the pins K1, K2, K3
of the contactor (3XC) and the first branch point (Ref. ASM
24-25/01).
3_ If the fault continues:
- replace the CNTOR-AC ESS BUS SWITCHING (3XC) (Ref. AMM TASK
24-25-55-000-001) and (Ref. AMM TASK 24-25-55-400-001).
- do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
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).
TASK 24-50-00-810-805
Failure of the Manual Switching Circuit of the AC Essential Bus
1. Possible Causes
_______________
- CNTOR-AC ESS BUS SWITCHING (3XC)
- CNTOR-AC ESS BUS SWITCHING (15XE)
- wiring
- P/BSW-ELEC/AC ESS FEED (11XC)
- RELAY-EMER CONDITION (12XE)
- C/B-AC ESS/BUS ON/BUS 2 (2XC) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(123)
