W DOC AIRBUS | TSM A320F

Pack 2 Electrical Component with Short Circuit (AIR PACK 2)

TASK 21-61-00-810-867-A
Pack 2 Electrical Component with Short Circuit (AIR PACK 2)

1. Possible Causes
  • CONT-AIR COND SYSTEM 2 [57HH]
  • P2 RAM AIR IN ACTUATOR [28HH]
  • VALVE-TURBINE BYPASS [30HH]
  • SENSOR-PACK OUTLET TEMP [34HH]
  • SENSOR-WATER EXTRACTOR TEMPERATURE [31HH]
  • P2 CONTROLLER [27HH]
  • SENSOR-COMPRESSOR OVHT [35HH]
  • P2 FLOW SENSOR [9HB]
  • P2 PRESS INL SENSOR [36HH]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 215101
AMM 21-51-11-000-001
Removal of the Differential Pressure Sensor
AMM 21-51-11-400-001
Installation of the Differential Pressure Sensor
ASM 216102
AMM 21-61-12-000-001
Removal of the Compressor Overheat - Temperature Sensor
AMM 21-61-12-400-001
Installation of the Compressor Overheat - Temperature Sensor
AMM 21-61-13-000-001
Removal of the Water-Extractor Temperature Sensors
AMM 21-61-13-400-001
Installation of the Water-Extractor Temperature Sensors
AMM 21-61-15-000-001
Removal of the Pack Outlet - Temperature Sensors
AMM 21-61-15-400-001
Installation of the Pack Outlet - Temperature Sensors
AMM 21-61-16-000-001
Removal of the Pack-Inlet Pressure Sensor
AMM 21-61-16-400-002
Installation of the Pack-Inlet Pressure Sensor
AMM 21-61-34-000-001
Removal of the Pack Controller
AMM 21-61-34-000-002
Removal of the Air-Conditioning System Controller
AMM 21-61-34-400-001
Installation of the Pack Controller
AMM 21-61-34-400-002
Installation of the Air-Conditioning System Controller
AMM 21-61-51-000-001
Removal of the Air-Inlet Flap Actuator
AMM 21-61-51-000-002
Removal of the Air Inlet
AMM 21-61-51-400-001
Installation of the Air-Inlet Flap Actuator 8HH and 28HH
AMM 21-61-51-400-002
Installation of the Air Inlet
AMM 21-61-53-000-001
Removal of the Turbine Bypass Valve
AMM 21-61-53-400-001
Installation of the Turbine Bypass Valve
3. Fault Confirmation
Subtask 21-61-00-710-149-A
A. Do a read out of the post flight report.
NOTE: The fault cannot be reproduced on the ground. You must fly the aircraft to see if the corrective action has been succesfull or not.
4. Fault Isolation
Subtask 21-61-00-810-180-B ** ON A/C NOT FOR ALL
A. If the post flight report gives the warning PACK 2 without a maintenance message:
   (1) If the fault moves with the ACSC2:
   (2) If the fault does not move with the ACSC2:
     (a) If the voltage is not between 9.1VDC and 9.9VDC:
  • disconnect the electrical connector (28HHA) AMM 21-61-51-000-002.
  • make sure that the electrical connector is clean and in the correct condition.
  • do a check for voltage again.
       1 If the voltage is between 9.1VDC and 9.9VDC:
       2 If the voltage is not between 9.1VDC and 9.9VDC:
     (b) If the voltage is between 9.1VDC and 9.9VDC:
Subtask 21-61-00-810-180-C ** ON A/C NOT FOR ALL
A. Restricted Pack Controller Fault Isolation
NOTE: This procedure is only applicable for:
  • Pack Controller Part Number 759D0000-xx
   (1) If the post flight report gives the warning PACK 2 without a maintenance message:
     (a) If the fault moves with the PC 2:
   (2) If the fault does not move with the PC 2:
     (a) If the voltage is not between 9.6VDC and 10.4VDC:
  • disconnect the electrical connector (28HHA) AMM 21-61-51-000-001.
  • make sure that the electrical connector is clean and in the correct condition.
  • do a check for voltage again.
       1 If the voltage is between 9.6VDC and 10.4VDC:
       2 If the voltage is not between 9.6VDC and 10.4VDC:
     (b) If the voltage is between 9.6VDC and 10.4VDC:
Subtask 21-61-00-810-198-A ** ON A/C NOT FOR ALL
B. If the fault continues:
   (1) Disconnect the electrical connector (7557VCA)
AMM 21-51-11-000-001 and,
  • make sure that the electrical connectors (7557VC) and (7557VCA) are clean and in a good condition.
     (a) At the electrical connector (7557VC) do a check for 15VDC at:
  • pins A and C and pins D and C, (15VDC from pack controller secondary channel).
    ASM 215101.
       1 If the voltage is correct:
   (2) If the fault continues:
   (3) If the fault continues:
  • open the CB's 21HH (W22), 22HH (Y20), 23HH (W21) and 24HH (Y21),
  • remove the P2 CONTROLLER [27HH]
    AMM 21-61-34-000-001,
  • disconnect the electrical connector (31HHA)
    AMM 21-61-13-000-001 and,
  • at the electrical connector (31HHA) do a check for a short circuit between:
    * pins C and D and,
    * GND and pins C and D.
    ASM 216102.
     (a) If there is a short circuit repair the related wiring between:
  • connector (31HHA) pin C and PC 2 connector (27HHAB) pin 2C,
  • connector (31HHA) pin D and PC 2 connector (27HHAB) pin 2D.
    ASM 216102.
  • connect the electrical connector (31HHA).
    AMM 21-61-13-400-001.
     (b) If there is no short circuit connect the electrical connector (31HHA).
AMM 21-61-13-400-001.
   (4) If the fault continues:
  • disconnect the electrical connector (28HHA)
    AMM 21-61-51-000-001 and,
  • at the electrical connector (28HHA) do a check for a short circuit between:
    * pins D and E, D and F, E and F and,
    * GND and pins D, E and F.
    ASM 216102.
     (a) If there is a short circuit repair the related wiring between:
  • connector (28HHA) pin D and PC 2 connector (27HHAB) pin 3D,
  • connector (28HHA) pin E and PC 2 connector (27HHAB) pin 4A,
  • connector (28HHA) pin F and PC 2 connector (27HHAB) pin 4B.
    ASM 216102.
  • connect the electrical connector (28HHA).
    AMM 21-61-51-400-001.
     (b) If there is no short circuit connect the electrical connector (28HHA).
AMM 21-61-51-400-001.
Subtask 21-61-00-810-199-C ** ON A/C NOT FOR ALL
C. If the fault continues:
   (1) Disconnect the electrical connector (30HHA)
AMM 21-61-53-000-001 and,
  • at the electrical connector (30HHA) do a check for a short circuit between:
    * pins U and J, U and K, U and L, J and K, J and L, K and L, C and D and,
    * GND and pins U, J, K, L and C.
    ASM 216102.
     (a) If there is a short circuit repair the related wiring between:
  • connector (30HHA) pin U and PC 2 connector (27HHAA) pin 2A,
  • connector (30HHA) pin J and PC 2 connector (27HHAA) pin 2B,
  • connector (30HHA) pin K and PC 2 connector (27HHAA) pin 2C,
  • connector (30HHA) pin L and PC 2 connector (27HHAA) pin 2D,
  • connector (30HHA) pin C and PC 2 connector (27HHAA) pin 5B.
    ASM 216102.
  • connect the electrical connector (30HHA).
    AMM 21-61-53-400-001.
     (b) If there is no short circuit connect the electrical connector (30HHA).
AMM 21-61-53-400-001.
Subtask 21-61-00-810-200-C ** ON A/C NOT FOR ALL
D. If the fault continues:
   (1) Disconnect the electrical connector (35HHA)
AMM 21-61-12-000-001 and,
  • at the electrical connector (35HHA) do a check for a short circuit between:
    * pins A and B, A and C, B and C and,
    * GND and pins A, B and C.
    ASM 216102.
     (a) If there is a short circuit repair the related wiring between:
  • connector (35HHA) pin A and PC 2 connector (27HHAB) pin 1A,
  • connector (35HHA) pin B and PC 2 connector (27HHAB) pin 1B,
  • connector (35HHA) pin C and PC 2 connector (27HHAB) pin 1C.
    ASM 216102.
  • connect the electrical connector (35HHA).
    AMM 21-61-12-400-001.
     (b) If there is no short circuit connect the electrical connector (35HHA).
AMM 21-61-12-400-001.
   (2) If the fault continues:
  • disconnect the electrical connector (7557VCA)
    AMM 21-51-11-000-001 and,
  • at the electrical connector (7557VC) do a check for a short circuit between:
    * pins C and B, C and A, C and D, B and A, B and D, A and D and,
    * GND and pins A, B, C and D.
    ASM 215101.
     (a) If there is a short circuit repair the related wiring between:
  • connector (7557VC) pin C and PC 2 connector (27HHAB) pin 10B,
  • connector (7557VC) pin B and PC 2 connector (27HHAB) pin 9D,
  • connector (7557VC) pin A and PC 2 connector (27HHAB) pin 9C,
  • connector (7557VC) pin D and PC 2 connector (27HHAB) pin 10C.
    ASM 215101.
  • connect the electrical connector (7557VCA).
    AMM 21-51-11-400-001.
     (b) If there is no short circuit connect the electrical connector (7557VCA).
AMM 21-51-11-400-001.
   (3) If the fault continues:
  • disconnect the electrical connector (34HHA)
    AMM 21-61-15-000-001 and,
  • at the electrical connector (34HHA) do a check for a short circuit between:
    * pins A and B, A and C, B and C and,
    * GND and pins A, B and C.
    ASM 216102.
     (a) If there is a short circuit repair the related wiring between:
  • connector (34HHA) pin A and PC 2 connector (27HHAB) pin 11D,
    connector (34HHA) pin B and PC 2 connector (27HHAB) pin 12B,
    connector (34HHA) pin C and PC 2 connector (27HHAB) pin 12A.
    ASM 216102.
  • connect the electrical connector (34HHA).
    AMM 21-61-15-400-001.
     (b) If there is no short circuit connect the electrical connector (34HHA).
AMM 21-61-15-400-001.
  • install the removed P2 CONTROLLER [27HH]
    AMM 21-61-34-400-001.
  • close the CB's 21HH (W22), 22HH (Y20), 23HH (W21) and 24HH (Y21).
5. Close-up
Subtask 21-61-00-860-088-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:24:56 UTC
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