(1) Do the check of the ram-air inlet door mechanism for excessive backlash.
(2) Do the pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001).
(3) Make sure that the pack 2 inlet-pressure indication on the ECAM BLEED page is > 20 PSI.
(4) Set the selectors COCKPIT, FWD CABIN and AFT CABIN, which are installed on the panel 30VU, to HOT for 10 minutes.
(5) Check of ram-air outlet airflow
WARNING : THE AIRFLOW CAN BE HOT.
_______
-HOT AIR CAN CAUSE BURNS.
(a) Do a check to see that there is airflow at the pack 2 ram-air outlet.
(6) Set the selectors COCKPIT, FWD CABIN and AFT CABIN to COLD.
(7) On the ECAM BLEED page do a check of the pack 2 discharge temperature (referred to as PDT 2).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 004-049, 055-099, 101-149, 151-199, ∞∞21-61-00∞∞∞∞∞∞∞∞∞∞Page A243
201-299, 301-399, 401-499, Aug 01/05 CES
**ON A/C ALL
4. Fault Isolation
_______________
**ON A/C 001-003, 051-054,
A. If the ram-air inlet doors are closed and the ram-air inlet
door-mechanism has more than 20mm backlash:
- replace the ram-air inlet door mechanism (Ref. AMM TASK 21-61-51-000-003) and (Ref. AMM TASK 21-61-51-400-003).
(1) If the ram-air outlet door mechanism is damaged:
- replace the ram-air outlet (Ref. AMM TASK 21-61-52-000-003) and (Ref. AMM TASK 21-61-52-400-003).
(2) If the ram air inlet and outlet door mechanism are in the correct condition and there is no airflow at the pack 2 ram-air outlet (on the BLEED page the flow control valve is open):
- replace the MACHINE-AIR CYCLE (11HM1) (Ref. AMM TASK 21-52-21-000-001) and (Ref. AMM TASK 21-52-21-400-001).
R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
A. If the ram-air inlet doors are closed and the ram-air inlet
door-mechanism has more than 20mm backlash:
- replace the ram-air inlet door mechanism (Ref. AMM TASK 21-61-51-000-003) and (Ref. AMM TASK 21-61-51-400-003).
(1) If the ram air inlet door mechanism is in the correct condition and there is no airflow at the pack 2 ram-air outlet (on the BLEED page the flow control valve is open):
- replace the MACHINE-AIR CYCLE (11HM1) (Ref. AMM TASK 21-52-21-000-001) and (Ref. AMM TASK 21-52-21-400-001).
**ON A/C ALL
B. If the PDT 2 is below 10 Deg.C (during the test para. 3.A.(4), (6), (7)):
- no other maintenance action is necessary.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
C. If the PDT 2 is above 10 Deg.C for less than 11 minutes, with the selectors COCKPIT, FWD CABIN and AFT CABIN, which are installed on the panel 30VU, set to COLD:
- no other maintenance action is necessary.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : ALL ∞∞21-61-00∞∞∞∞∞∞∞∞∞∞Page A244
Aug 01/05 CESR **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299,
D. If the PDT 2 is above 10 Deg.C for more than 11 minutes, with the selectors COCKPIT, FWD CABIN and AFT CABIN, which are installed on the panel 30VU, set to COLD: - open and close the CBs 1HK, 2HK, 3HK and 4HK.
(1) If the PDT 2 goes below 10 Deg.C:
- do the functional test of the cockpit and cabin temperature control system (Ref. AMM TASK 21-63-00-720-001).
(2) If the fault continues:
(a) Remove the inspection panel from the pack 2 ram-air inlet plenum (11HM14).
(b) Do a check of the water injector nozzle for damage or wear:
- replace the water injector nozzle if it is worn or damaged (Ref. AMM TASK 21-52-00-960-001).
(c) Do a check of the main heat exchanger (11HM7) for contamination:
- If the main heat exchanger is clogged do the cleaning of the clogged main heat exchanger (11HM7) and the clogged primary heat exchanger (11HM6) (Ref. AMM TASK 21-52-00-100-001).
(d) Install the inspection panel on the pack 2 ram-air inlet plenum (11HM14).
(3) If the fault continues:
- do a check that the resistance of the water extractor temperature sensor (31HH) measured between connector A/E and A/F and connector A/C and A/D is in these limits (Ref. ASM 21-61/02):
Temp (Deg.C) OHMS ---------------------------
+ 10 18820 +/- 5 %
+ 18 13340 +/- 5 %
+ 25 10000 +/- 5 %
+ 30 8197 +/- 5 %
+ 40 5598 +/- 5 %
+ 50 3903 +/- 5 % 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 AIR CONDITIONING 空调2(65)
