-
the APU BLEED p/bsw ON legend shows on.
-
the OFF legend on the PACK 1 and the PACK 2 p/bsw shows off.
(b)
Set the X BLEED selector to the OPEN position.
(3)
Do the operational test of both BMCs (Ref. AMM TASK 36-11-00-740-001).
(4) Stop the APU (Ref. AMM TASK 49-00-00-860-004). R **ON A/C 106-149, 211-299, 301-399, 401-499,
A. Test
(1)
Start the APU (Ref. AMM TASK 49-00-00-860-005).
(2)
On the AIR COND panel 30VU:
(a)
Make sure that:
-
the APU BLEED p/bsw ON legend shows on.
-
the OFF legend on the PACK 1 and the PACK 2 p/bsw shows off.
(b)
Set the X BLEED selector to the OPEN position.
(3)
Do the operational test of both BMCs (Ref. AMM TASK 36-11-00-740-001).
(4)
Stop the APU (Ref. AMM TASK 49-00-00-860-006).
1 -EFF : ALL
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4. Fault Isolation
_______________
A. If both BMCs give the maintenance message X-FEED VALVE 6HV OR CKT and the VALVE-X BLEED (6HV) is accidentally open:
-put the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) to the CLOSE position.
(1)
If the VALVE-X BLEED (6HV) closes:
-remove one of the two BMCs (Ref. AMM TASK 36-11-34-000-001),
-do the operational test again.
(a)
If the test is OK:
-replace the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001).
(b)
If the test is not OK:
-install the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001).
-remove the other BMC (Ref. AMM TASK 36-11-34-000-001),
-do the operational test again.
(2)
If the fault continues:
-do a check for a ground signal at the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV) connector A/X2 (Ref. ASM 36-12/01).
(a)
If there is a ground signal:
-do a check and repair the wiring between: the BMC-1, BMC-2 (1HA1, 1HA2) connector AB/5A and the X-BLEED-VALVE AUTO CTL RELAY (4HV) connector A/X2 (Ref. ASM 36-12/01).
(b)
If there is no ground signal:
-replace the X-BLEED-VALVE AUTO CTL RELAY (4HV).
(3)
If the VALVE-X BLEED (6HV) does not close:
-replace the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on the panel 30VU.
(4)
If the fault continues:
1_ If the test is OK:
- replace the removed BMC-1 (1HA1) or BMC-2 (1HA2) (Ref. AMM
TASK 36-11-34-000-001).
-replace the VALVE-X BLEED (6HV) (Ref. AMM TASK 36-12-52-000-001) and (Ref. AMM TASK 36-12-52-400-001).
1
-EFF : ALL
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B. If both BMCs give the maintenance message X-FEED VALVE 6HV OR CKT and the VALVE-X BLEED (6HV) is accidentally closed:
-replace the VALVE-X BLEED (6HV) (Ref. AMM TASK 36-12-52-000-001) and (Ref. AMM TASK 36-12-52-400-001).
(1) If the fault continues:
-put the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on panel 30VU to the OPEN position.
(a)
If the VALVE-X BLEED (6HV) opens:
-replace the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV).
(b)
If the VALVE-X BLEED (6HV) does not open:
1_ If the fault continues:
- replace the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) on the
panel 30VU.
2_ If the fault continues:
- do a check and repair the wiring between:
the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV) connector
A/A3,A1 and the VALVE-X BLEED (6HV) connector A/H,J (Ref.
ASM 36-12/01),
- do a check and repair the wiring between:
the VALVE-X BLEED (6HV) connector A/G and ground (Ref. ASM
36-12/01).
3_ If the fault continues:
- do a check and repair the wiring between:
the CROSSBLEED-VALVE SELECTOR SWITCH (3HV) connector A/23
and the X-BLEED-VALVE AUTOMATIC-CONTROL RELAY (4HV)
connector A/A2,X1 (Ref. ASM 36-12/01).
4_ If the fault continues:
- do a check and repair the wiring between:
the CIRCUIT BREAKER (1HV) and the CROSSBLEED-VALVE SELECTOR
SWITCH (3HV) connector A/21 (Ref. ASM 36-12/01).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 PNEUMATIC(108)
