- the message LO AIR PRESS on the lower ECAM DU,
- the BLUE ELEC PUMP P/BSW FAULT light on panel 40VU,
- do a visual check of the pressure shown on the gage of the Blue reservoir.
(1) If the pressure is more than 25 psi (1.7236 bar):
- do a check of the wiring between: PRESS SW-B RSVR AIR (2384GH) connector A/A and PRESS SW-B RSVR AIR (2384GH) connector A/C (Ref. ASM 29-12/01).
(a) If there is continuity:
- replace the PRESS SW-B RSVR AIR (2384GH) (Ref. AMM TASK 29-34-11-000-002) (Ref. AMM TASK 29-34-11-400-002).
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(b) If there is no continuity:
- make sure that the wiring is not connected to GND between: PRESS SW-B RSVR AIR (2384GH) connector A/C and DIODE (1156VD) connector 5. (Ref. ASM 29-12/01).
1 If the wiring is connected to the GND:
_ - repair the wiring.
(2) If the pressure shown on the gage of the Blue reservoir is less than 25 psi (1.7236 bar):
- do a check of the clogging indicator on the Reservoir Pressurization Unit (1360GM).
(a) If the clogging indicator is out:
- replace the filter element (Ref. AMM TASK 29-14-41-610-002).
(b) If the clogging indicator is not out, or the fault continues after replacement of the filter element:
- pressurize the hydraulic reservoirs with a ground cart (Ref. AMM TASK 29-14-00-614-002),
- do a check of the pressure drop on the gage of the hydraulic reservoir.
NOTE : No pressure drop is permitted within 15 minutes at a gage
____ pressure of 50 psi (3.4473 bar)
1 If the air pressure drop is out of limits:
_
- do a check of the VALVE-MAN DEPRESS, B RSVR (2087GM) for leaks.
a If the VALVE-MAN DEPRESS, B RSVR (2087GM) has a leak:
_
- replace the VALVE-MAN DEPRESS, B RSVR (2087GM) (Ref. AMM TASK 29-14-16-000-002) and (Ref. AMM TASK 29-14-16-400-002).
b If the VALVE-MAN DEPRESS, B RSVR (2087GM) has no leak:
_
- do a check of the VALVE-AIR RELIEF, B RSVR (2005GM) for leaks.
- If the VALVE-AIR RELIEF, B RSVR (2005GM) has a leak:
- replace the VALVE-AIR RELIEF, B RSVR (2005GM) (Ref. AMM TASK 29-14-17-000-001) and (Ref. AMM TASK 29-14-17-400-001).
- If the VALVE-AIR RELIEF, B RSVR (2005GM) has no leak:
- do a check of the PRESS GAGE-B RSVR (2383GM) for leaks.
- If the PRESS GAGE-B RSVR (2383GM) has a leak:
- replace the PRESS GAGE-B RSVR (2383GM) (Ref. AMM TASK 29-14-15-000-002) and (Ref. AMM TASK 29-14-15-400-002).
- If the PRESS GAGE-B RSVR (2383GM) has no leak:
- do a check of all connections and components on the reservoir for leaks.
- If you find a leak:
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2
_
- tighten the related nut or replace the defective component.
c If the fault continues:
_
- replace the CHECK VALVE-RSVR PRESS, B (2388GM).
If the air pressure drop is in the limits:
a Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-
_ 00-614-001).
b Pressurize the reservoir pressurization system with the
_ left engine (Ref. AMM TASK 29-14-00-720-002), or
c Connect an external pressure source:
_
- disconnect the reservoir pressurization hose (1674GM) from the HP bleed-air port of the left engine (Ref. AMM TASK 29-14-49-000-001)
- connect an approved air or nitrogen inflation adaptor to the line end fitting of the reservoir pressurization hose (1674GM)
- pressurize the reservoir pressurization system to
approximately 15.2 bar (220 psi).
d If the pressure in the reservoir does not increase to the
_ necessary value:
- remove the RESTRICTOR- RSVR PRESS, ENG 1 BLEED (1392GM) (Ref. AMM TASK 29-14-13-000-001).
- make sure that the RESTRICTOR- RSVR PRESS, ENG 1 BLEED (1392GM) and the filter are not clogged or damaged.
- if necessary, replace the RESTRICTOR- RSVR PRESS, ENG 1 BLEED (1392GM) (Ref. AMM TASK 29-14-13-400-001). 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 液压(38)
