W DOC AIRBUS | TSM A320F

Pack 1 High Flow Indication

TASK 21-51-00-810-815-A
Pack 1 High Flow Indication

1. Possible Causes
  • P2 FLOW CTL VALVE [8HB]
  • FLOW CTL UNIT - PACK 2 [24HB]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 21-51-00-810-813-A
Pack 1 Flow Indication Fault
AMM 12-33-21-618-001
Pre-conditioning through the LP Ground Connection
ASM 215101
ASM 215102
AMM 21-51-51-000-001
Removal of the Pack Flow-Control Valve/ Pack Flow-Control Unit
AMM 21-51-51-400-001
Installation of the Pack Flow-Control Valve/ Pack Flow-Control Unit
AMM 71-00-00-710-003
Engine Automatic Start
3. Fault Confirmation
Subtask 21-51-00-860-076-A
A. Bleed Air Supply Source from the HP Ground Connection
NOTE: The HP ground supply source must be able to give a pack inlet pressure of 24 PSI minimum. If it can not do this then you must get the bleed air supply from the engines.
The work steps which follow show the conditions necessary before you get the minimum pack-inlet pressure.
   (1) Do the pre-conditioning through the HP ground connection AMM 12-33-21-618-001.
   (2) On the AIR COND panel 30VU:
  • push the HOT AIR pushbutton switch to the on position (the OFF legend goes off),
  • turn the COCKPIT, FWD CABIN and the AFT CABIN temperature selectors to the HOT positions and,
  • make sure that the PACK 1 and the PACK 2 pushbutton switches are in the on position (the OFF legends are off).
   (3) On the ECAM BLEED page:
  • make sure that the pack 1 inlet pressure indication shows a minimum of 24 PSI.
NOTE: If the indication shows less than 24 PSI you must:
  • increase the ground pressure supply until the indication shows a minimum of 24 PSI.
Subtask 21-51-00-860-074-A ** ON A/C NOT FOR ALL
B. Start the engines AMM 71-00-00-710-003 if necessary.
4. Fault Isolation
Subtask 21-51-00-810-087-A ** ON A/C NOT FOR ALL
A. This procedure is only applicable for the Flow Control Valves P/N 751 series.
   (1) When the pack flow selector is at the LO or NORM position:
   (2) If the fault continues:
Subtask 21-51-00-810-087-B ** ON A/C NOT FOR ALL
A. When the pack flow selector is at the LO or NORM position:
   (1) If the fault continues:
Subtask 21-51-00-810-104-A ** ON A/C NOT FOR ALL
B. This procedure is only applicable for the Flow Control Valves P/N 1303 series.
   (1) When the pack flow selector is at the LO or NORM position:
  • on the upper ECAM DU if the pack 1 flow shows in the HI flow position and both pack flow-control valve indications show green,
     (a) do a check of the wiring ASM 215101 and ASM 215102 from:
  • the FCV (8HB/A) pin C to the PACK1 TEMP CONTROLLER (7HH/AA) pin 7B,
  • the FCV (8HB/A) pin B to ground.
     (b) If the fault continues:
  • do a check for continuity between pin A/B and pin A/C of the P2 FLOW CTL VALVE (8HB).
       1 If there is no continuity:
         a replace the P2 FLOW CTL VALVE [8HB] AMM 21-51-51-000-001 and AMM 21-51-51-400-001.
   (2) If the fault continues:
5. Close-up
Subtask 21-51-00-720-062-A ** ON A/C NOT FOR ALL
A. This procedure is only necessary after you do the work step Para. 4. B. (a).
  • Do the procedures given in para. 3.
Subtask 21-51-00-720-062-B ** ON A/C NOT FOR ALL
A. Not applicable
[Rev.8 from Aug 2018] 2026.04.04 04:24:48 UTC
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