W DOC AIRBUS | TSM A320F

Fault in the Air Compressor System.

TASK 38-42-00-810-801-A
Fault in the Air Compressor System.

1. Possible Causes
  • membrane switch, WTR SYSTEM DEPRE
  • MSW-LIMIT SW [5MA]
  • AIRFILTER 4211MM
  • FILTER,AIR [4212MM]
  • PWR SPLY COMPRESSOR RELAY 9MD
  • wiring
  • COMPRESSOR [8MD]
  • SWITCH,PRESSURE [10MD]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 38-13-00-820-801
Adjustment of the Stud for Limit-Switch (5MA) of Potable-Water Service-Panel Access-Door (171AL)
AMM 38-42-00-610-001
Discard Compressor Outlet Filter-Element
AMM 38-42-00-610-002
Discard Compressor Inlet Filter-Element
AMM 38-42-00-710-001
Operational Test of the Auxiliary Air Supply System.
AMM 38-42-00-720-001
Functional Test of the Pressure Switch
ASM 384201
AMM 38-42-16-000-001
Removal of the Pressure Switch
AMM 38-42-16-400-001
Installation of the Pressure Switch
AMM 38-42-42-000-001
Removal of the Air Filter
AMM 38-42-42-400-001
Installation of the Air Filter
AMM 38-42-51-000-001
Removal of the Compressor
AMM 38-42-51-400-001
Installation of the Compressor
3. Fault Confirmation
Subtask 38-42-00-710-053-A ** ON A/C NOT FOR ALL
A. Make sure that the light in the membrane switch, WTR SYSTEM DEPRE on the FAP is OFF.
Subtask 38-42-00-710-050-A ** ON A/C NOT FOR ALL
B. Test
   (1) Do a test of the auxiliary air-supply system AMM 38-42-00-710-001.
4. Fault Isolation
Subtask 38-42-00-810-050-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message NO WATER PRESSURE ON GROUND:
  • open and close the circuit breakers 1MA and 19MD.
   (1) If the fault continues:
  • make sure that the access panel 171AL on the SERVICE PANEL 2023VU is closed.
   (2) If the fault continues:
  • do a check of the MSW-LIMIT SW [5MA] adjustment on the SERVICE PANEL 2023VU and adjust as necessary AMM 38-13-00-820-801.
   (3) If the fault continues:
  • make sure that the AIRFILTER 4211MM (if fitted) is not blocked.
     (a) If it is blocked:
   (4) If the fault continues:
  • make sure that the AIRFILTER 4212MM is not blocked.
     (a) If it is blocked:
   (5) If the fault continues:
  • do a check of the PWR SPLY COMPRESSOR RELAY 9MD and replace it if necessary.
   (6) If the fault continues:
  • do a check and repair the wiring if necessary between the:
    CB 19MD and AIR COMPRESSOR 8MD connector A/C,
    CB 19MD and AIR COMPRESSOR 8MD connector A/B,
    CB 19MD and AIR COMPRESSOR 8MD connector A/A,
    AIR COMPRESSOR 8MD connector A/E and GND ASM 384201.
   (7) If the fault continues:
   (8) If the fault continues:
  • do a check of the MSW-LIMIT SW [5MA] and replace it if necessary.
   (9) If the fault continues:
   (10) If the fault continues:
  • do a check and repair the wiring between the:
    CB 1MA and COMPRESSOR RELAY 9MD connector A/X1,
    COMPRESSOR RELAY 9MD connector A/X2 and GND ASM 384201.
Subtask 38-42-00-710-051-A ** ON A/C NOT FOR ALL
B. Do the test as given in paragraph 3. A. to check the correct operation (no maintenance message is shown).
[Rev.8 from Aug 2018] 2026.04.04 04:34:17 UTC
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