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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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10/02/20

Message Overview:

Fault Message:

ACPC GTC 4/GTC5 CONTACTOR-K12 FAIL

Fault Code:

2451351ACP

Associated CAS:

ELEC SYS FAULT
(Advisory)

Reporting LRU: AC Power Center (ACPC)
System Description: 24-50-00
Schematic Diagram: 24-51-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-51-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The AC Power Center (ACPC) Primary Logic Cards (PLC) detects a discrepancy between the coil drive status and the auxiliary contact status of the contactor K12.

Possible Causes:

  • AC Power Center (ACPC) Contactor (K12)
  • AC Power Center (ACPC) (A54)
  • AC Power Center (ACPC) TB601
  • AC Power Center (ACPC) TB402
  • AC Power Center (ACPC) TB401
  • Electronic Module 2 (EM2)
  • Primary Logic Card (PLC) 1
  • Primary Logic Card (PLC) 2
  • Primary Logic Card (PLC) 3
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

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 ]
Removal of the AC Power Center (ACPC) Primary Logic AMM 24-51-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) Primary Logic AMM 24-51-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC)LC-Series Contactors (K4, K6, K9, K12) AMM 24-51-37-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC)LC-Series Contactors (K4, K6, K9, K12) AMM 24-51-37-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) Electronic Modules AMM 24-51-81-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) Electronic Modules AMM 24-51-81-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
AC Power Center Component Maintenance Manual CMM 24-51-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect contactor K12 connector P404 in the ACPC.
  2. Turn the BATT MSTR SW to ON.
  3. Perform a check for 28 Volts DC between contactor K12 to ground as follow:

    From To Result
    P404-1 Ground
    P404-2 Ground

    1. If there is 28 Volts DC, go to step 5.
    2. If there is no 28 Volts DC, continue with next step.

  4. Perform wiring checks between EM2, TB401 and TB402 as follow:

    From To Result
    P206 TB402-2
    TB401-1 TB402-2

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

  5. Turn the BATT MSTR SW to OFF.
  6. Perform a continuity check between contactor K12 to ground as follows:

    From To Result
    P404-13 Ground
    P404-11 Ground

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

  7. Perform wiring checks TB601 and TB401 as follow:

    From To Result
    TB601-1 TB401-3

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

  8. Remove PLC 1, PLC 2 and PLC 3.
  9. Perform a continuity check with the connections as follows:

    From To Result
    P404-14 Ground
    P404-12 Ground
    P404-22 Ground
    P404-3 Ground

    1. If there is continuity, go to step 14.
    2. If there is no continuity, continue with next step.

  10. Replace contactor K12.

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

  11. Re-install PLC 2 and PLC 3.

    1. If system checks is good, replace PLC 1 and do close out.
    2. If fault remains, continue with next step.

  12. Remove PLC 2 and reinstall PLC 1.

    1. If system checks is good, replace PLC 2 and do close out.
    2. If fault remains, continue with next step.

  13. Remove PLC 3 and reinstall PLC 2.

    1. If system checks is good, replace PLC 3 and do close out.
    2. If fault remains, continue with next step.

  14. Replace ACPC.
  15. Do close out.

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