W DOC AIRBUS | TSM A320F

Loss of the Zone Controller Data on the ARINC Bus from the EIU to the FADEC on Engine 2

TASK 73-25-00-810-925-A
Loss of the Zone Controller Data on the ARINC Bus from the EIU to the FADEC on Engine 2

1. Possible Causes
  • ZONE CONTROLLER [8HK]
  • EIU-2 [1KS2]
  • CONT-AIR COND SYSTEM 1 [47HH]
  • CONT-AIR COND SYSTEM 2 [57HH]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-61-34-000-002
Removal of the Air-Conditioning System Controller
AMM 21-61-34-400-002
Installation of the Air-Conditioning System Controller
AMM 21-63-34-000-001
Removal of the Zone Controller
AMM 21-63-34-400-001
Installation of the Zone Controller
ASM 732506
AMM 73-25-34-000-040
Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040
Installation of the Engine Interface Unit (EIU)
AMM 73-25-34-710-040
Operational Test of the Engine Interface Unit
AMM 73-25-34-710-043
Operational Test of the Engine Interface Unit
AMM 73-29-00-710-040
Operational Test of the FADEC on the ground (with Engine Motoring)
3. Fault Confirmation
Subtask 73-25-00-710-297-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 2 on the ground (with engine non motoring) AMM 73-29-00-710-040.
Subtask 73-25-00-710-297-B ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 2 on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-25-00-810-177-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ZC, EIU (ECSD), J3 or ZNCNT, EIU (ECSD), J3:
  • do a check for open or short to ground at the pins AA/3J, 3K to pins AA/1J, 2J of the wiring from the the EIU2 to the CONT-ZONE TEMPERATURE (8HK) and at pins AA/2J, 2K to pins AA/1B, 2B of the wiring from the the EIU2 to the CONT-ZONE TEMPERATURE (8HK). ASM 732506.
   (1) If one of these wirings is not correct:
  • repair the defective corresponding wiring.
   (2) If these wirings are correct:
  • do an operational test of the engine interface unit and see if the "NO ZONE CONT DATA" message is shown AMM 73-25-34-710-040.
     (a) If the message is shown:
     (b) If the message is not shown:
Subtask 73-25-00-810-177-C ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ZC, EIU (ECSD), J3:
  • do a check for open or short to ground at the pins AA/2J, 2K to pins AA/7E, 7F of the wiring from the the EIU2 to the CONT-AIR COND SYSTEM 1 (47HH) and at pins AA/3J, 3K to pins AA/7E, 7F of the wiring from the the EIU2 to the CONT-AIR COND SYSTEM 2 (57HH). ASM 732506.
   (1) If one of these wirings is not correct:
  • repair the defective corresponding wiring.
   (2) If these wirings are correct:
  • do an operational test of the engine interface unit and see if the "NO ZONE CONT DATA" message is shown AMM 73-25-34-710-043.
     (a) If the message is shown:
     (b) If the message is not shown:
Subtask 73-25-00-810-177-F ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ZC, EIU (ECSD), J3 or ZNCNT, EIU (ECSD), J3:
  • do a check for open or short to ground at the pins AA/2J, 2K to pins AA/7E, 7F of the wiring from the the EIU2 to the CONT-AIR COND SYSTEM 1 (47HH) and at pins AA/3J, 3K to pins AA/7E, 7F of the wiring from the the EIU2 to the CONT-AIR COND SYSTEM 2 (57HH). ASM 732506.
   (1) If one of these wirings is not correct:
  • repair the defective corresponding wiring.
   (2) If these wirings are correct:
  • do an operational test of the engine interface unit and see if the "NO ZONE CONT DATA" message is shown AMM 73-25-34-710-040.
     (a) If the message is shown:
     (b) If the message is not shown:
Subtask 73-25-00-710-298-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:35:49 UTC
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