W DOC AIRBUS | TSM A320F

Pack Controller 2 (ACSC2) Fault

TASK 21-61-00-810-806-A
Pack Controller 2 (ACSC2) Fault

1. Possible Causes
  • wiring
  • CONT-AIR COND SYSTEM 2 [57HH]
  • P2 CONTROLLER [27HH]
  • sense line
  • P2 FLOW CTL VALVE [8HB]
  • VALVE-TURBINE BYPASS [30HH]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 21-61-00-810-821-A
Pack 2 Electrical Component with Short Circuit (AIR PACK 2 REGUL FAULT)
ASM 215101
AMM 21-51-11-400-001
Installation of the Differential Pressure Sensor
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 21-61-00-710-001
Operational Test of the Pack Temperature-Control System
ASM 216101
ASM 216102
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 21-61-53-000-001
Removal of the Turbine Bypass Valve
AMM 21-61-53-400-001
Installation of the Turbine Bypass Valve
ASM 216302
AMM 32-69-00-740-001
BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative
3. Fault Confirmation
Subtask 21-61-00-710-060-A ** ON A/C NOT FOR ALL
A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.
NOTE: If a fault is detected, the PC gives a fault code for shop maintenance in addition to the related CFDS message(s) (refer to TSM chapter 21-63-00, page block 301).
Subtask 21-61-00-710-060-B ** ON A/C NOT FOR ALL
A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.
4. Fault Isolation
Subtask 21-61-00-810-072-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message TEST FAILED with the fault code (6E):
  • do a check for a ground signal at the PC 2 (27HH) connector AA/9B ASM 216101.
   (1) If there is no ground signal:
   (2) If test gives a different maintenance message refer to the Fault Symptom List.
     (a) If the fault continues:
  • do a check and repair the wiring if necessary between:
    PC 2 (27HH) connector AA/9B and LGCIU 2 (5GA2) connector AB/3J ASM 216101.
   (3) If the fault continues:
  • do a check and repair the wiring between:
    PC 2 (27HH) connector AB/6B and FCV (8HB) connector A/D,
    PC 2 (27HH) connector AA/1D and FCV (8HB) connector A/E,
    PC 2 (27HH) connector AA/1C and FCV (8HB) connector A/F,
    PC 2 (27HH) connector AA/1B and FCV (8HB) connector A/G,
    PC 2 (27HH) connector AA/1A and FCV (8HB) connector A/V,
    PC 2 (27HH) connector AA/11C and FCV (8HB) connector A/J,
    PC 2 (27HH) connector AA/11B and FCV (8HB) connector A/K,
    PC 2 (27HH) connector AA/11A and FCV (8HB) connector A/L ASM 215101.
Subtask 21-61-00-810-073-C ** ON A/C NOT FOR ALL
B. If the test gives the maintenance message P2 CONT:
   (1) If the fault continues:
  • do a check and repair the wiring if necessary between:
    PC 2 (27HH) connector AA/5A and CB (21HH),
    PC 2 (27HH) connector AA/5B and GND,
    PC 2 (27HH) connector AB/13D and CB (22HH),
    PC 2 (27HH) connector AB/14A and GND ASM 216101.
   (2) If the fault continues:
  • a check and repair if necessary the wiring of the signal:
    ARINC 429 XTR (M) from the ZC (8HK) to the PC 2 (27HH),
    ARINC 429 XTR (S) from the ZC (8HK) to the PC 2 (27HH),
    ARINC 429 RCV (M) from the ZC (8HK) to the PC 2 (27HH) ASM 216302.
   (3) If the fault continues:
   (4) If the fault continues:
   (5) If the fault continues:
  • do a check that the resistance of the torque motor of the FCV (8HB) measured between:
    pin A/F and A/V is between 36 ohm and 44 ohm.
     (a) If the resistance value is out of these limits, replace the P2 FLOW CTL VALVE [8HB] AMM 21-51-51-000-001 and AMM 21-51-51-400-001.
Subtask 21-61-00-810-072-B ** ON A/C NOT FOR ALL
C. If the test gives the maintenance message TEST FAILED with the fault code (6E):
  • do a check for a ground signal at the ACSC1 (47HH)AA pin 9B ASM 216101.
   (1) If there is no ground signal:
     (a) If the test gives a different maintenance message, do the related trouble shooting procedure. Use the fault symptom(s) as entry into the TSM.
     (b) If the fault continues:
  • do a check and repair the wiring ASM 216101 from:
  • the ACSC2 (57HH) to the LGCIU 2.
   (2) If the fault continues:
  • do a check and repair the wiring ASM 215101 from:
  • the ACSC2 (57HH) to the FCS (24HB).
Subtask 21-61-00-810-073-B ** ON A/C NOT FOR ALL
D. If the test gives the maintenance message ACSC2 (57HH):
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216101 from:
  • the ACSC2 (57HH) to the CB (53HH),
  • the ACSC2 (57HH) to the CB (54HH) and,
  • the ACSC2 (57HH) to ground.
   (2) If the fault continues:
Subtask 21-61-00-810-126-A ** ON A/C NOT FOR ALL
E. If the test gives the maintenance message NO 28V ON PACK 2 MAIN:
  • do a check and repair the wiring between:
    PC 2 (27HH) connector AA/8C and CB (23HH),
    PC 2 (27HH) connector AA/8D and GND ASM 216101.
Subtask 21-61-00-810-127-A ** ON A/C NOT FOR ALL
F. If the test gives the maintenance message NO 28V ON PACK 2 SECD:
  • do a check and repair the wiring between:
    PC 2 (27HH) connector AB/9A and CB (24HH),
    PC 2 (27HH) connector AB/9B and GND ASM 216101.
Subtask 21-61-00-810-267-A ** ON A/C NOT FOR ALL
G. If the fault continues:
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216102 from:
  • the VALVE (30HH) to the PC 2 (27HH) and,
  • the VALVE (30HH) to ground.
Subtask 21-61-00-810-267-B ** ON A/C NOT FOR ALL
G. If the fault continues:
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216102 from:
  • the VALVE (30HH) to the ACSC2 (57HH)
  • the VALVE (30HH) to ground.
Subtask 21-61-00-710-061-A
H. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-61-00-860-055-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:24:52 UTC
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