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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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01/29/21

Message Overview:

Message Name:

[ACSC2-B] AVIONICS FAN CMD /AVFAN

Message Code:

2164529ECS

Associated CAS:

AVIONIC FAN FAIL
(Advisory)

Reporting LRU: Air Conditioning System Controller (ACSC) 2
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 ]

Message Description:

The Avionics Exhaust Fan has been detected failed by the right Air Conditioning System Controller (ACSC).

Possible Causes:

  • Avionics Exhaust Fan Converter (B29)
  • Avionics Exhaust Fan (B62)
  • Air Conditioning System Controller (ACSC) 2 (A88)
  • AC Power Center (ACPC) (A54)
  • AC Power Center (ACPC) Solid State Power Controller (SSPC) Card
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Avionics Exhaust Fan AMM 21-54-37-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Avionics Exhaust Fan AMM 21-54-37-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Avionics Exhaust-Fan Converter AMM 21-54-41-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Avionics Exhaust-Fan Converter AMM 21-54-41-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
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 AC Power Center (ACPC) AMM 24-51-00-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) AMM 24-51-00-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Check that the circuit breaker for the Avionics Fan is "IN" on the EMSCDU AIRCOND/PRESS page 1.
  2. Make sure there is no obstruction in the Avionics Exhaust Fan. Make sure the Avionics Exhaust Fan is not making any abnormal noise that would indicate an Avionics Exhaust Fan deficiency. If any, perform the following:

    1. Remove FOD or replace Avionics Exhaust Fan as required.

  3. Perform wiring checks between ACSC 1 and the Avionics Exhaust Fan converter including the ground.
  4. Perform wiring checks between Avionics Exhaust Fan converter and Avionics Exhaust Fan including the ground.
  5. Perform wiring checks between Avionics Exhaust Fan converter and ACPC.
  6. Make sure the power from ACPC is received at the Avionics Exhaust Fan converter.

    1. If there is no power, continue with next step.
    2. If there is power, go to 8.

  7. Access the ACPC logic assembly. Remove SSPC card 15 and interchange with another SSPC card. Replace defective SSPC card if necessary. Is the fault still present?

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

  8. Interchange ACSC 1 with ACSC 2. Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, replace defective ACSC.

  9. Replace Avionics Exhaust Fan converter. Is the fault still present?

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

  10. Replace Avionics Exhaust Fan.
  11. Do close out.

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