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Troubleshooting
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Select color for CAS message that you wish to troubleshoot

(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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Quick Links

06/10/19

Message Overview:

Fault Message:

ACSC1 [CH B NO DATA] /ACSC2 /WRG

Fault Code:

2162327ECS

Associated CAS:

L PACK AUTO FAIL
(Caution)

L PACK FAULT
(Advisory)

Reporting LRU: Air Conditioning System Controller (ACSC) 1
System Description: 21-60-00
Schematic Diagram: 21-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 36-11-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Air Conditioning System Controller (ACSC) 1 Channel B does not receive data from ACSC 2.

Possible Causes:

  • Air Conditioning System Controller (ACSC) 1 (A87)
  • Air Conditioning System Controller (ACSC) 2 (A88)
  • Junction Box (JB4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active (Global Express / XRS - (9002 to 9312, 9314 to 9380, 9384 to 9429) and Global 5000 - (9127 to 9383, 9389 to 9400, 9404 to 9431 and 9998))

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Air-Conditioning System Controllers AMM 21-60-21-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Air-Conditioning System Controllers AMM 21-60-21-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Junction Box JB4 AMM 24-00-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB4 AMM 24-00-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Turn CAIMS ACTIVE off (no Black Dot) in View/Environment menu, Red screen in cockpit should extinguish.
  2. Wait a few minutes for systems to stabilize.
  3. Refresh CAIMS Active Faults Screen. Is message clear?

    1. If NO, go to step 6.
    2. If YES, continue with next step.

  4. Perform Advisory Wire AW700-21-0160 "PACK FAULT" CAS Message While CAIMS is Active. Is fault message clear?

    1. If YES, do close out.
    2. If NO, continue with next step.

  5. Swap ACSC 1 with ACSC 2. Is fault transferred or gone?

    1. If YES, replace ACSC 1 and do close out.
    2. If NO, continue with next step.

  6. Perform wiring checks between ACSC 1 and JB4 (ref: Wiring Manual: 36-11-00 Sheet 2 of 12 Page 2).

    1. If the wiring checks are not good, repair the defective associated wiring and do close out.
    2. If the wiring checks are good, continue with next step.

  7. Perform continuity check of JB4 (ref wiring checks and Wiring Manual: 36-11-00 Sheet 2 of 12 Page 2).

    1. If there is continuity, repair the defective associated wiring and do close out.
    2. If there is no continuity, continue with next step.

  8. Replace JB4.
  9. Do close out.

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