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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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10/09/20

Message Overview:

Fault Message:

ACPC AC 3 CABIN FEED RELAY-K23

Fault Code:

2451362ACP

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:

Secondary Logic Card 3 (SLC 3) detects a discrepancy between the coil drive status and auxiliary contact status of the Contactor K23.

Possible Causes:

  • AC Power Center (ACPC) (A54)
  • AC Power Center (ACPC) Contactor (K23)
  • Secondary Logic Card (SLC) 3
  • Electronic Module (EM2)
  • AC Power Center (ACPC) TB302
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

If AC 3 CABIN FEED RELAY (K23) is tripped and is not resettable:

  1. Check K23 output (A2/B2/C2) and make sure all the three phases are not shorted to ground

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) Secondary Logic AMM 24-51-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) Secondary Logic AMM 24-51-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) K-Series Relays (K16, K19, K23 and K26) AMM 24-51-69-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) K-Series Relays (K16, K19, K23 and K26) AMM 24-51-69-400-801 [ 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 ]

Troubleshooting Recommendations:

  1. Swap SLC 3 with SLC 4.

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

  2. Perform a check for 28 VDC as follows:

    From To Result
    K23-X1 Ground

    1. If there is no voltage and there is CAIMS fault messages related to EM 2 Fuses (F1, F2, F3 and F4), troubleshoot these messages first.
    2. If there is no voltage and there are no CAIMS fault messages related to EM2 fuses (F1, F2, F3 and F4), continue with next step.
    3. If there is voltage, go to step 4.

  3. Check TB302-1 connection. Repair as required.

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

  4. Remove aircraft power. Remove SLC 3 and disconnect K23-X1, K23-X2, K23-Y1, K23-Y2, K23-11 and K23-12. Perform a continuity check between the connections that follows:

    From To Result
    K23-X2 (lug) Ground
    K23-Y2 (lug) Ground
    K23-12 (lug) Ground

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

  5. Perform a continuity check between K23-11 (lug) and ground.

    From To Result
    K23-11 (lug) Ground

    1. If there is continuity go to step 7.
    2. If there is no continuity, continue with next step.

  6. Check TB302-3 connection.

    1. If connection is correct, go to step 8.
    2. If connection is not correct, repair as required and do close out.

  7. Perform a continuity check between the connections that follows:

    From To Result
    K23-Y2 (lug) SLC3-P311A-12
    K23-X2 (lug) SLC3-P311A-13
    K23-12 (lug) SLC3-P311C-17

    1. If there is continuity, replace K23 and do close out.
    2. If there is no continuity, continue with next step.

  8. Replace ACPC.
  9. Do close out.

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