NOTE : The PDT 1 increases regularly (because of the pack de-icing
____
 operation).

R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 401-499,
 A. Test NOTE : Do the steps (6) and (7) in less than 120 s, if not, the control
____
 of the zone temperature stabilizes.

 (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 1 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 1 ram-air outlet.
 「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 : 001-049, 051-099, 101-149, 151-199, ∞∞21-61-00∞∞∞∞∞∞∞∞∞∞Page A229
 201-299, 401-499, Aug 01/05 CES

 (6) Set the selectors COCKPIT, FWD CABIN and AFT CABIN to COLD.

 (7) On the ECAM BLEED page do a check of the pack 1 discharge temperature (referred to as PDT 1).

 NOTE : The PDT 1 increases regularly (because of the pack de-icing
____
 operation).

 **ON A/C 301-399,
 A. Test NOTE : Do the steps (6) and (7) in less than 120 s, if not, the control
____
 of the zone temperature stabilizes.

 (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 1 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 1 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 1 discharge temperature (referred to as PDT 1).

 「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 A230
 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 1 ram-air outlet (on the BLEED page the flow control valve is open):

 - replace the MACHINE-AIR CYCLE (10HM1) (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 1 ram-air outlet (on the BLEED page the flow control valve is open):
 - replace the MACHINE-AIR CYCLE (10HM1) (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 1 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 1 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 A231
　
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