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(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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04/07/21

Message Overview:

Message Name:

FSU FAN FAULT

Message Code:

B3-471454

Associated CAS:

None

Reporting LRU: FSU 1
System Description: 46-00-00
Schematic Diagram: 46-21-00
Wiring Diagram: 46-21-01
46-21-05

Message Description:

File Server Unit 1 has reported a fan fault.

Possible Causes:

  • File Server Unit 1 (FSU 1) Cooling Fan (A223)
  • File Server Unit 1 (FSU 1) (A221)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Component Location AMM 46-21-00-992-801
Removal of the File Server Unit (FSU) AMM 46-21-01-000-801
Installation of the File Server Unit (FSU) AMM 46-21-01-400-801
Removal of the File Server Unit (FSU) Mounting Tray AMM 46-21-03-000-801
Installation of the File Server Unit (FSU) Mounting Tray AMM 46-21-03-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. Reset L FILE SERVER (CB1-C6) circuit breaker.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  2. Confirm power and ground are available at FSU 1 Cooling Fan connector A223J/P2.

    1. If 28 VDC and ground are available, go to step 4.
    2. If 28 VDC and/or ground is not available, continue with next step.

  3. Do wiring check between FSU 1 Cooling Fan connector A223J/P2 and circuit breaker CB1-C6 L FILE SERVER. Replace/repair as required.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  4. Do wiring check between FSU 1 connector A221P1 and FSU 1 Cooling Fan connector A223P/J2. Replace/repair as required.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  5. Swap FSU Cooling fans, (if single FSU is installed, replace FSU 1 Cooling Fan).

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  6. Swap FSUs. (If single FSU is installed, replace FSU 1).
  7. Do close out.

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