4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
A. If the test gives the maintenance message TRIM AIR PRESS VALVE OR PRESS SWITCH:
- replace the trim air pressure-regulating valve filter (Ref. AMM TASK 21-63-00-920-001).
(1) If the fault continues:
- replace the VALVE-PRESSURE REGULATING (14HK) (Ref. AMM TASK 21-63-52-000-001) and (Ref. AMM TASK 21-63-52-400-001).
(2) If the fault continues:
- replace the PRESSURE SWITCH-HOT AIR (26HK) (Ref. AMM TASK 21-63-19-000-001) and (Ref. AMM TASK 21-63-19-400-001).
(3) If the fault continues:
- do a check and repair the wiring (Ref. ASM 21-63/01) and (Ref. ASM 21-63/03) from:
- the VALVE (14HK) to the ZC (8HK),
- the VALVE (14HK) to ground,
- the VALVE (14HK) to the CB (3HK) via the P/BSW (7HK),
- the SWITCH (26HK) to the ZC (8HK) and,
- the SWITCH (26HK) to ground.
B. If the test gives the maintenance message TEST OK, but the POST FLIGHT REPORT and the PREVIOUS LEG REPORT give the maintenance message TRIM AIR PRESS VALVE OR PRESS SWITCH:
- replace the PRESSURE SWITCH-HOT AIR (26HK) (Ref. AMM TASK 21-63-19-000-001) and (Ref. AMM TASK 21-63-19-400-001).
(1) If the fault continues:
- replace the VALVE-PRESSURE REGULATING (14HK) (Ref. AMM TASK 21-63-52-000-001) and (Ref. AMM TASK 21-63-52-400-001).
R **ON A/C 401-499,
A. If the test gives the maintenance message TRIM AIR PRESS VALVE(14HK) OR PRESS SWITCH(26HK):
- replace the trim air pressure-regulating valve filter (Ref. AMM TASK 21-63-00-920-001).
(1) If the fault continues:
- replace the VALVE-PRESSURE REGULATING (14HK) (Ref. AMM TASK 21-63-52-000-001) and (Ref. AMM TASK 21-63-52-400-001).
「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 ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page A209
Aug 01/05 CES
(2) If the fault continues:
- replace the PRESSURE SWITCH-HOT AIR (26HK) (Ref. AMM TASK 21-63-19-000-001) and (Ref. AMM TASK 21-63-19-400-001).
(3) If the fault continues:
- do a check and repair the wiring (Ref. ASM 21-63/01) and (Ref. ASM 21-63/03) from:
- the VALVE (14HK) to the ACSC1 (47HH),
- the VALVE (14HK) to ground,
- the VALVE (14HK) to the CB (3HK) via the P/BSW (7HK),
- the SWITCH (26HK) to the ACSC1 (47HH) and,
- the SWITCH (26HK) to ground.
B. If the test gives the maintenance message TEST OK, but the POST FLIGHT REPORT and the PREVIOUS LEG REPORT give the maintenance message TRIM AIR PRESS VALVE (14HK) OR PRESS SWITCH(26HK):
- replace the PRESSURE SWITCH-HOT AIR (26HK) (Ref. AMM TASK 21-63-19-000-001) and (Ref. AMM TASK 21-63-19-400-001).
(1) If the fault continues:
- replace the VALVE-PRESSURE REGULATING (14HK) (Ref. AMM TASK 21-63-52-000-001) and (Ref. AMM TASK 21-63-52-400-001).
**ON A/C ALL
C. Do the test as given in the Para. 3.A.
「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 ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page A210
Aug 01/05R
CES
TASK 21-63-00-810-850
Pack 1 Trim Air Check Valve Fault
1. Possible Causes
_______________
- CHECK VALVE-TRIM AIR (18HM)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 AIR CONDITIONING 空調(diào)2(137)
