3. Fault Confirmation
__________________
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
「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 ∞∞35-10-00∞∞∞∞∞∞∞∞∞∞Page 201
Feb 01/98 CES
(3) On the panel 21VU, push the OXYGEN/CREW SUPPLY pushbutton switch (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 oxygen pressure indication is replaced by amber crosses on the DOOR/OXY page.
(3) If the circuit breaker (1HT) trips:
- refer to Para. 4.A.(2).
4. Fault Isolation
_______________
A. If the test confirms the fault:
- do a check of the circuit breaker (1HT) status:
(1) If the circuit breaker (1HT) is closed:
- do a check for 28VDC at pin A/C of the pressure regulator/transmitter (4HT) (Ref. ASM 35-13/01).
(a) If there is 28VDC:
- replace the XMTR/PRESS REG-OXY (4HT) (Ref. AMM TASK 35-13-15-000-001) and (Ref. AMM TASK 35-13-15-400-001).
1 If the fault continues:
_
- do a check and repair the wiring from the pressure regulator/transmitter (4HT) pin A/A, B to the first terminal block (Ref. ASM 35-13/01).
(b) If there is no 28VDC:
- do a check for a ground signal at pin A/D of the pressure regulator/transmitter (4HT) (Ref. ASM 35-13/01).
1 If there is no ground signal:
_
- repair the wiring from the pressure regulator/transmitter (4HT) pin A/D to the ground terminal (Ref. ASM 35-13/01).
2 If there is a ground signal:
_
- do a check of the wiring from the pressure regulator/transmitter (4HT) to the circuit breaker (1HT) pin A/C to pin 2 (Ref. ASM 35-13/01).
「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 ∞∞35-10-00∞∞∞∞∞∞∞∞∞∞Page 202
Feb 01/98 CES a If there is no continuity:
_ - repair the above wiring.
b If there is continuity:
_
- replace the C/B-OXYGEN/CREW/OXY/SPLY (1HT) (Ref. ASM 35-13/01).
(2) If the circuit breaker is open:
- close it.
(a) If it trips:
- replace the XMTR/PRESS REG-OXY (4HT) (Ref. AMM TASK 35-13-15-000-001) and (Ref. AMM TASK 35-13-15-400-001).
1 If the fault continues:
_
- do a check for a short to ground at the wiring from the circuit breaker (1HT) to the pressure regulator/transmitter (4HT) pin 2 to pin A/C (Ref. ASM 35-13/01).
a If there is a short to ground.
_ - repair the above wiring.
b If there is no short to ground.
_
- do a check for a short to ground at the wiring from the pressure regulator/transmitter (4HT) pins A/A, B to the first terminal block (Ref. ASM 35-13/01).
2 If there is a short to ground:
_ - repair the above wiring.
3 If there is no short to ground:
_ - replace the C/B-OXYGEN/CREW/OXY/SPLY (Ref. ASM 35-13/01).
(b) If the circuit breaker is still closed and 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).
B. Test
(1) Make sure that the oxygen pressure indication comes on the DOOR/OXY page.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
(1) On the ECAM Control Panel, set the LOWER DISPLAY and the UPPER DISPLAY potentiometers to OFF.
(2) On the panel 21VU:
- release the OXYGEN/CREW SUPPLY pushbutton switch. The OFF legend comes on.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 氧气 OXYGEN(9)
