(c) If the fault continues:
- make sure that the wiring is not connected to GND between: LOW LEVEL SWITCH connector B/B and DIODE (1156VD) connector 15 (Ref. ASM 29-12/01) and (Ref. ASM 29-31/01).
1 If the wiring is connected to GND:
_ - repair the wiring as necessary.
(d) If the fault continues:
- replace the the QUANTITY INDICATOR - TRANSMITTER (Ref. AMM TASK 29-12-41-000-002) and (Ref. AMM TASK 29-12-41-400-002).
(2) If the quantity shown is less than 2.4 l (0.6340 USgal):
- make sure that the drain valve of the hydraulic reservoir has no leaks.
(a) If the drain valve has a leak:
- replace the drain valve.
(b) If the drain valve has no leaks:
- do a check of the hydraulic lines and the components for leaks (Ref. AMM TASK 29-00-00-790-001) and repair them.
(c) If the fault continues:
- do a check of the internal leakage of the Blue hydraulic system (Ref. AMM TASK 29-00-00-280-002).
1 If the internal leakage rate is too high:
_ - repair the defective component.
2 If the fault continues, or you can not find a defective
_
component:
- take a fuel sample from each water drain-valve (Ref. AMM TASK 12-32-28-281-001),
- do a check for contamination of the fuel with hydraulic fluid after each removal of a fuel sample.
a If you find hydraulic fluid contamination in one or more
_
fuel samples:
- do a check of the hydraulic lines and components in the applicable tank area for leaks and repair them.
B. If the Fault Confirmation gives:
- the message HYD B RSVR LO LVL on the upper ECAM DU,
- the contents indication (shows low fluid level) on the lower ECAM DU in amber:
- do a visual check of the quantity shown on the mechanical indicator of the Blue reservoir.
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(1) If the quantity shown is more than or equal to 1.8 l (0.4755 USgal):
(a) Do a check for 26 VAC between: QUANTITY INDICATOR - TRANSMITTER connector A/D and connector A/E (Ref. ASM 29-31/01).
1 If there is no 26 VAC:
_
- do a check of the wiring between: QUANTITY INDICATOR - TRANSMITTER connector A/D and CB (1831GQ) and repair the wiring as necessary (Ref. ASM 29-31/01).
2 If the fault continues:
_
- do a check for a ground signal between: QUANTITY INDICATOR - TRANSMITTER connector A/E and ground (Ref. ASM 29-31/01).
a If there is no ground signal:
_ - repair the wiring between QUANTITY INDICATOR -TRANSMITTER connector A/E and ground (Ref. ASM 29-31/01).
(b) If the fault continues:
- replace the QUANTITY INDICATOR - TRANSMITTER (Ref. AMM TASK 29-12-41-000-002) and (Ref. AMM TASK 29-12-41-400-002).
(c) If the fault continues:
- do the troubleshooting procedure for the loss of the BLUE RSVR QTY input of the SDAC-1 (1WV1) (Ref. TASK 31-54-00-810-831).
1 If the fault continues:
_
- do the troubleshooting procedure for the loss of the BLUE RSVR QTY input of the SDAC-2 (1WV2) (Ref. TASK 31-54-00-810-832).
(2) If the quantity shown is less than or equal to 2.0 l (0.5283 USgal):
- do a check for 28 VDC at: LOW LEVEL SWITCH connector B/C (Ref. ASM 29-31/02).
(a) If there is no 28 VDC:
- do a check of the wiring between: LOW LEVEL SWITCH connector B/C and CB (1832GQ) and repair the wiring as necessary (Ref. ASM 29-31/02).
(b) If there is 28VDC:
- replace the LOW LEVEL SWITCH (Ref. AMM TASK 29-12-41-000-003) and (Ref. AMM TASK 29-12-41-400-003).
(c) If the fault continues:
- make sure that the wiring is not connected to GND between: LOW LEVEL SWITCH connector B/B and DIODE (1156VD) connector 15 (Ref. ASM 29-12/01) and (Ref. ASM 29-31/01).
「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 ∞∞29-12-00∞∞∞∞∞∞∞∞∞∞Page 218
May 01/05R CES
1 If the wiring is connected to GND:
_ - repair the wiring as necessary.
(3) Make sure that the drain valve of the hydraulic reservoir has no leaks.
(a) If the drain valve has a leak:
- replace the drain valve.
(b) If the drain valve has no leaks:
- do a check of the hydraulic lines and components for leaks (Ref. AMM TASK 29-00-00-790-001) and repair them. 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(42)
