R . If the FAULT legend comes on:
R - replace the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-000-R 001) and (Ref. AMM TASK 27-94-34-400-001)
R (5) Install all the removed SEC's.
R (6) Close the circuit breaker ELAC 2 NORM SPLY (15CE2).
R C. If the voltage is less than 25.5 V, do a check to find if the problem
R comes from the ELAC 2 hydraulic discrete-inputs.
R (1) Make sure that the three hydraulic systems are not pressurized (Ref.
R AMM TASK 29-10-00-864-001), (Ref. AMM TASK 29-10-00-864-002) and
R (Ref. AMM TASK 29-10-00-864-003).
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R (2) Remove the ELAC 1 (2CE1), ELAC 2 (2CE2), SEC 1 (1CE1), SEC 2 (1CE2)
R and SEC 3 (1CE3) from their rack.
R (3) Do a check of a ground signal or an open circuit at the discrete
R inputs DSI 40, 42 and 32 of the ELAC 2 rack when the hydraulic
R pressure state is low (Ref. ASM 27-92/27).
R (a) If a ground signal or an open circuit is found at one discrete
R input:
R - repair the related wiring between the ELAC 2 and the first
R terminal block.
R (4) Install all the removed ELAC's and SEC's.
R D. If the voltage is less than 25.5 V and the problem does not come from the
R Spoiler Elevator Computers (SEC) and from the ELAC 2 hydraulic
R discrete-inputs:
- do the BITE test of the EFCS (Ground scanning) (Ref. AMM TASK 27-96-00-740-001).
NOTE : Do this test procedure with the hydraulic systems not pressurized.
____
(1) If there is a maintenance message related to these pressure switches:
- PRESS SW-B HYD, FLT CTL (10CE1),
- PRESS SW-G HYD, FLT CTL (10CE2),
- PRESS SW-Y HYD, FLT CTL (10CE3),
- PRESS SW-FLT CTL, G (1151GN),
- PRESS SW-FLT CTL, B (2151GN),
- PRESS SW-FLT CTL, Y (3151GN), do the related trouble shooting (Ref. TSM 27 PB 101)
(2) If there is no maintenance message related to the hydraulic pressure switches:
- in the cockpit, on the ELEC panel 35VU, release the BAT2 pushbutton switch and put a warning notice(s) to tell persons not to operate the battery 2,
- in the battery power center 105VU, disconnect the cable between the BAT2 shunt (3PB2) and the ground: for this, remove the bolt and washer from the shunt (Ref. ASM 24-38/02),
- connect an ammeter to the disconnected cable and the disconnected terminal of the shunt: make sure that the polarities of the tool are correct,
- in the cockpit, in the ELEC panel 35VU, push the BAT2 pushbutton switch and remove the warning notice(s),
- do a check of the current value.
(a) If the current is more than 400 mA:
- open the circuit breaker 16CE2 while you monitor the current value (Ref. ASM 27-92/01).
1 If the current value suddenly falls below 400mA when you open
_
the circuit breaker:
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- disconnect one by one the electrical connectors from these pressure switches (Ref. ASM 27-92/27):
- PRESS SW-FLT CTL, B (2151GN) (Ref. AMM TASK 29-32-12-000-002),
- PRESS SW-FLT CTL, Y (3151GN) (Ref. AMM TASK 29-32-12-000-003),
- PRESS SW-FLT CTL, G (1151GN) (Ref. AMM TASK 29-32-12-000-001),
- PRESS SW-B HYD, FLT CTL (10CE1) (Ref. AMM TASK 27-92-17-000-003),
- PRESS SW-Y HYD, FLT CTL (10CE3) (Ref. AMM TASK 27-92-17-000-002),
- PRESS SW-G HYD, FLT CTL (10CE2) (Ref. AMM TASK 27-92-17-000-001),
while you monitor the current value after you closed the
circuit breaker 16CE2.
a If after you disconnected the PRESS SW-FLT CTL, B (2151GN)
_ the current value is less than 400mA:
- replace the PRESS SW-FLT CTL, B (2151GN), (Ref. AMM TASK 29-32-12-000-002) (Ref. AMM TASK 29-32-12-400-002) and connect all the electrical connectors that you disconnected.
b If after you disconnected the PRESS SW-FLT CTL, Y (3151GN),
_ the current value is less than 400mA:
- replace the PRESS SW-FLT CTL, Y (3151GN), (Ref. AMM TASK 29-32-12-000-003) (Ref. AMM TASK 29-32-12-400-003) and connect all the electrical connectors that you disconnected.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(72)
