(2) On the panel 21VU:
- release the OXYGEN/CREW SUPPLY pushbutton switch. The OFF legend comes on.
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CES
TASK 35-10-00-810-821
REGUL LO PR indication on the DOOR/OXY Page
1. Possible Causes
_______________
- PRESS SW-OXYGEN LO PR (4WV)
- XMTR/PRESS REG-OXY (4HT)
- SOL VALVE-LP OXY SPLY (3HT)
- wiring from the pressure switch (4WV) pin A/B to the first terminal block
- P/BSW-OXYGEN/CREW SUPPLY (2HT)
- wiring from the pushbutton switch (2HT) pin A/B3 to the first terminal block
- wiring from the pushbutton switch (2HT) to the solenoid valve (3HT)
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
AMM 31-60-00-860-002 EIS Stop Procedure
AMM 35-12-41-710-001 Operational Test of the Full Face/Quick Donning
Oxygen Masks (5757HM,5758HM,5759HM,5760HM) AMM 35-13-14-000-001 Removal of the Press Sw-Oxygen LO PR (4WV) AMM 35-13-14-400-001 Installation of the Press Sw-Oxygen LO PR (4WV) AMM 35-13-15-000-001 Removal of the Oxygen Pressure Regulator/Transmitter
(4HT)
AMM 35-13-15-400-001 Installation of the Oxygen Pressure
Regulator/Transmitter (4HT) AMM 35-13-51-000-001 Removal of the Sol Valve-LP Oxy Sply (3HT) AMM 35-13-51-400-001 Installation of the LP Oxygen-Supply Solenoid-Valve
(3HT)
ASM 35-13/01
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).
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(b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001)
(c) On the panel 21VU push the OXYGEN/CREW SUPPLY pushbutton switch 2HT (the OFF legend goes off).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU OXYGEN/CREW/OXY/SPLY 1HT HA01
C. Test
(1) On the ECAM control panel:
- push the DOOR key to get the DOOR/OXY page:
(2) Make sure that the REGUL LO PR indication comes into view on the DOOR/OXY page.
(3) Do the operational test of the full-face/quick-donning mask (Ref. AMM TASK 35-12-41-710-001).
4. Fault Isolation
_______________
A. If during the operational test the flow rate indicator comes into view for a short time and if you hear the oxygen flow rate:
- replace the PRESS SW-OXYGEN LO PR (4WV) (Ref. AMM TASK 35-13-14-000-001) and (Ref. AMM TASK 35-13-14-400-001).
(1) If the fault continues:
- replace the XMTR/PRESS REG-OXY (4HT) (Ref. AMM TASK 35-13-15-000-001) and (Ref. AMM TASK 35-13-15-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the pressure switch (4WV) pin A/B to the first terminal block.
B. If during the operational test the flow rate indicator does not come into view and you do not hear the oxygen flow rate:
- disconnect the plug of the solenoid valve (3HT) and do a check for 28VDC at pin A/A (pushbutton switch 2HT on).
(1) If there is 28VDC:
- replace the SOL VALVE-LP OXY SPLY (3HT) (Ref. AMM TASK 35-13-51-000-001) and (Ref. AMM TASK 35-13-51-400-001).
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) 氧氣 OXYGEN(21)
