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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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06/13/19

Message Overview:

Fault Message:

ACSC1-AIRCRAFT CONFIG DISAGREE

Fault Code:

2171700ECS

Associated CAS:

None

Reporting LRU: Air Conditioning System Controller (ACSC) 1
System Description: 21-54-00
Schematic Diagram: 21-54-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-54-15 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The left Air Conditioning System Controller (ACSC) sees a mismatch between the pin programming of ACSC 1 and ACSC 2 regarding the aircraft type.

Possible Causes:

  • Air Conditioning System Controller (ACSC) 1 (A87)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

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 ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Access CAIMS and check the pin programming as follow for both ACSCs to identify the affected side:

    • System Diag
    • 21-00 Air Conditioning
    • Choose the Air Conditioning System Controller in which you want to verify the configuration
    • LRU TEST
    • CTRL PANEL & VALVE DATA

  2. Make sure the AIRCRAFT CONFIG is in accordance with the actual aircraft type for both ACSCs.

    1. If the AIRCRAFT CONFIG is in accordance with the actual aircraft type, do close out.
    2. If the AIRCRAFT CONFIG is NOT in accordance with the actual aircraft type, continue with next step.

  3. Perform a wiring checks between the following for the affected side:
    For Left ACSC: Make sure that ground stud (GS1158) resistance is in accordance with AMM tolerances.

    From To Result
    A87P1-29 GS1158

    For Right ACSC: Make sure that ground stud (GS1167) resistance is in accordance with AMM tolerances.

    From To Result
    A88P1-29 GS1167

    NOTE: Ground = 5000 and Open = GX / XRS

    1. If wiring and grounds are unserviceable, repair the defective associated wiring and do close out.
    2. If wiring and grounds are serviceable, continue with next step.

  4. Replace ACSC 1.
  5. Do close out.

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