W DOC AIRBUS | TSM A320F

Pack 1 Fault

TASK 21-61-00-810-803-A
Pack 1 Fault

1. Possible Causes
  • pressure sense line
  • P1 FLOW CTL VALVE [11HB]
  • SENSOR-COMPRESSOR PNEUMATIC OVHT [10HM9]
  • FLOW CTL UNIT - PACK 1 [23HB]
  • SENSOR-COMPRESSOR TEMPERATURE [12HH]
  • SENSOR-COMPRESSOR OVHT [15HH]
  • P1 FLOW SENSOR [10HB]
  • SDAC
  • SENSOR-DELTA P, PACK 1 [23HB2]
  • P/BSW-AIR COND/PACK 1 [7HB]
  • BOARD-ANN LT TEST & INTFC [8LP]
  • P1 CONTROLLER [7HH]
  • wiring
  • CONT-AIR COND SYSTEM 1 [47HH]
  • VALVE-TURBINE BYPASS [10HH]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 21-51-00-810-803-A
Pack 1 Flow Control Valve (Pack 1 Flow Control Unit) Fault
AMM 12-33-21-618-001
Pre-conditioning through the LP Ground Connection
AMM 21-51-00-200-001
Delta P Sense Lines Torque Check and Inspection
ASM 215102
AMM 21-51-11-000-001
Removal of the Differential Pressure Sensor
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 216104
AMM 21-61-11-000-001
Removal of the Compressor Outlet - Temperature Sensor
AMM 21-61-11-400-001
Installation of the Compressor Outlet - Temperature Sensor
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 21-61-18-000-001
Removal of the Compressor Pneumatic Overheat-Sensor
AMM 21-61-18-400-001
Installation of the Compressor Pneumatic Overheat-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 21-61-53-000-001
Removal of the Turbine Bypass Valve
AMM 21-61-53-400-001
Installation of the Turbine Bypass Valve
AMM 33-14-00-710-001
Operational Test of the Lights
3. Fault Confirmation
Subtask 21-61-00-710-054-A ** ON A/C NOT FOR ALL
A. Test
NOTE: If the PACK 1 FAULT warning has appeared during engine start or the flow control valve did not close during engine start (Ref. TSM TASK 21-51-00-810-803).
   (1) Do the pre-conditioning through the HP ground connection AMM 12-33-21-618-001.
   (2) Do a check to make sure that the pack 1 inlet-pressure indication on the ECAM BLEED page is > 20 PSI.
   (3) Do a check to make sure that the pack 1 flow control-valve symbol on the ECAM BLEED page is shown in the open position.
   (4) 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 21-61-00-710-054-B ** ON A/C NOT FOR ALL
A. Test
NOTE: If the PACK 1 FAULT warning has appeared during engine start or the flow control system did not close during engine start (Ref. TSM TASK 21-51-00-810-803).
   (1) Do the pre-conditioning through the HP ground connection AMM 12-33-21-618-001.
   (2) Do a check to make sure that the pack 1 inlet-pressure indication on the ECAM BLEED page is > 20 PSI.
   (3) Do a check to make sure that the pack 1 flow control-valve symbol on the ECAM BLEED page is shown in the open position.
   (4) Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.
4. Fault Isolation
Subtask 21-61-00-810-066-A
A. If the pack 1 inlet-pressure indication on the ECAM BLEED page is < 20 PSI:
  • increase the pressure to > 25 PSI.
Subtask 21-61-00-810-067-A ** ON A/C NOT FOR ALL
B. If the pack 1 flow control-valve symbol on the ECAM BLEED page is shown in the closed position:
   (1) If the fault continues:
   (2) If the fault continues:
Subtask 21-61-00-810-054-B ** ON A/C NOT FOR ALL
C. If the test confirms the fault:
  • do a check that the resistance of the compressor temperature sensor (12HH) measured between connector A/A and A/B is in these limits ASM 216104:
Temp (Deg.C)
OHMS
+ 10
103.9 +/- 0.5
+ 20
107.8 +/- 0.5
+ 30
111.7 +/- 0.5
+ 50
119.4 +/- 0.5
+ 70
127.1 +/- 0.5
+ 100
138.5 +/- 0.5
   (1) If the resistance values are out of the specified limits:
   (2) If the fault continues:
  • do a check that the resistance of the compressor overheat sensor (15HH) measured between connector A/A and A/B is in these limits ASM 216104:
Temp (Deg.C)
OHMS
+ 10
103.9 +/- 0.5
+ 20
107.8 +/- 0.5
+ 30
111.7 +/- 0.5
+ 50
119.4 +/- 0.5
+ 70
127.1 +/- 0.5
+ 100
138.5 +/- 0.5
     (a) If the resistance values are out of the specified limits:
   (3) If the fault continues:
Do the inspection of the delta P sense lines AMM 21-51-00-200-001.
   (4) If the fault continues:
Replace the P1 FLOW SENSOR [10HB] AMM 21-51-11-000-001 and AMM 21-51-11-400-001.
   (5) If the fault continues:
     (a) Swap the SDAC's (1WV1 and 1WV2). (Ref.AMM Task 31-55-34-401)
     (b) If this action has solved the problem:
  • replace the SDAC which formerly was SDAC1.
   (6) If the fault continues:
     (a) Open the CB's for the Pack Controller 1+2.
     (b) Disconnect the Pack Controller's. ( Ref.AMM Task 21-61-34-401)
     (c) Diconnect the electrical connectors at the FCV£1 (11HB) and FCV£2 (8HB). (Ref.AMM Task 21-51-51-401)
     (d) Disconnect the SDAC£1.
     (e) Do a check for GND at the SDAC£1 connector AA pin 10D.
     (f) Do a check for GND at the SDAC£1 connector AA pin 13B.
NOTE: There should be no GND contact
     (g) If there is no GND contact, reconnect the SDAC£1.
     (h) If there is GND contact do a check of the wiring and repair if nessesary.
Subtask 21-61-00-810-107-A ** ON A/C NOT FOR ALL
D. If the test gives the maintenance message TEST OK, but the FAULT legend on the pushbutton switch AIR COND/PACK 1, which is installed on the panel 30VU, comes on:
   (1) If the test gives a different maintenance message refer to the Fault Symptom List.
   (2) If the fault continues:
  • do a check of the P/BSW-AIR COND/PACK 1 [7HB] and replace it if necessary ASM 215102.
   (3) If the fault continues:
  • do a check of the BOARD-ANN LT TEST & INTFC [8LP] and replace it if necessary ASM 215102.
   (4) If the fault continues:
   (5) If the fault continues:
  • do a check and repair the wiring between:
    RELAY (8LP) connector A/30 and SW (7HB) connector A/7,
    RELAY (8LP) connector A/41 and GND,
    RELAY (8LP) connector A/27 and PC 1 (7HH) connector AB/7A
    RELAY (8LP) connector A/27 and RELAY (15HB) connector B/A2,
    RELAY (8LP) connector A/29 and CB (1HB) ASM 215102.
Subtask 21-61-00-810-067-B ** ON A/C NOT FOR ALL
E. If the pack 1 flow control-valve symbol on the ECAM BLEED page is shown in the closed position:
Subtask 21-61-00-810-054-C ** ON A/C NOT FOR ALL
F. If the test confirms the fault:
  • do a check that the resistance of the compressor temperature sensor (12HH) measured between connector A/B and A/C and connector A/E and A/F is in these limits ASM 216104:
Temp (Deg.C)
OHMS
+ 10
103.9 +/- 0.5
+ 20
107.8 +/- 0.5
+ 30
111.7 +/- 0.5
+ 50
119.4 +/- 0.5
+ 70
127.1 +/- 0.5
+ 100
138.5 +/- 0.5
   (1) If the resistance values are out of the specified limits:
   (2) If the fault continues:
Replace the SENSOR-DELTA P, PACK 1 [23HB2] AMM 21-51-11-000-001 and AMM 21-51-11-400-001.
   (3) If the fault continues:
     (a) Swap the SDAC's (1WV1 and 1WV2).(Ref.AMM Task 31-55-34-401)
     (b) If this action has solved the problem:
  • replace the SDAC which formerly was SDAC£1.
   (4) If the fault continues:
     (a) Open the CB's for the ACSC1+2.
     (b) Disconnect the ACSC1 and ACSC2 ( Ref.AMM Task 21-61-34-402)
     (c) Diconnect the electrical connectors at the FCS£1 (23HB) and FCS£2 (24HB). (Ref.AMM Task 21-51-51-401)
     (d) Disconnect the SDAC£1.
     (e) Do a check for GND at the SDAC£1 connector AA pin 10D.
     (f) Do a check for GND at the SDAC£1 connector AA pin 13B.
NOTE: There should be no GND contact
     (g) If there is no GND contact, reconnect the SDAC£1.
     (h) If there is GND contact do a check of the wiring and repair if nessesary.
Subtask 21-61-00-810-107-B ** ON A/C NOT FOR ALL
G. If the test gives the maintenance message TEST OK, but the FAULT legend on the pushbutton switch AIR COND/PACK 1, which is installed on the panel 30VU, comes on:
   (1) If the test gives a different maintenance message refer to the Fault Symptom List.
   (2) If the fault continues:
  • do a check of the P/BSW-AIR COND/PACK 1 [7HB] and replace it if necessary ASM 215102.
   (3) If the fault continues:
  • do a check of the BOARD-ANN LT TEST & INTFC [8LP] and replace it if necessary ASM 215102.
   (4) If the fault continues:
   (5) If the fault continues:
  • do a check and repair the wiring ASM 215102 from:
  • the RELAY (8LP)A pin 30 and the SW (7HB)A pin 7,
  • the RELAY (8LP)A pin 41 and ground,
  • the RELAY (8LP)A pin 27 and the ACSC1 (47HH).
Subtask 21-61-00-810-268-A ** ON A/C NOT FOR ALL
H. If the fault continues:
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216104 from:
  • the VALVE (10HH) to the PC 1 (7HH) and,
  • the VALVE (10HH) to ground.
Subtask 21-61-00-810-268-B ** ON A/C NOT FOR ALL
H. If the fault continues:
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216104 from:
  • the VALVE (10HH) to the ACSC1 (47HH)
  • the VALVE (10HH) to ground.
Subtask 21-61-00-710-055-A
I. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-61-00-860-052-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:38:53 UTC
"AVIABRAIN" 2025