background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults By CAIMS By Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

12/12/25

Message Overview:

Message Name:

ACPC AC 1 FEEDER CONTACTOR-K15 FAIL

Message Code:

2451354ACP

Associated CAS:

ELEC SYS FAIL
Caution

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

Message Description:

Secondary Logic Card (SLC) 1 detects a discrepancy between the coil drive status and auxiliary contact status of the Contactor K15.

Possible Causes:

  • AC Power Center (ACPC) (A54)
  • Contactor (K15)
  • Secondary Logic Card (SLC) 1
  • Electronic Module 1 (EM1)
  • AC Power Center (ACPC) Motherboard
  • Electromagnetic Interference (EMI) Filter
  • AC Power Center (ACPC) TB202
  • AC Power Center (ACPC) TB102
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

  • If AC BUS 1 FEEDER (K15) is tripped and is not resettable:

    • Check K15 output (A2/B2/C2) and make sure all the three phases are not shorted to ground.
    • Do resistance check between current transformer IS1A and com, IS1B and com and IS1C and com. Make sure the resistance values on each phase are approximate the same value.

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 24-51-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) H-Series Contactor AMM 24-51-29-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) H-Series Contactor AMM 24-51-29-400-801 [ 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. Interchange SLC 1 with SLC 2 (Refer to illustration).

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

  2. Perform a voltage check as follows:

    From To Result
    K15-X1 Ground

    1. If no voltage and there are no CAIMS messages related to EM1 fuses (F1, F2, F3 and F4), continue with next step.
    2. If no voltage and there is CAIMS messages related to EM1 Fuses (F1, F2, F3 and F4), troubleshoot these messages first and continue with next step.
    3. If there is 28 VDC, go to step 4.

  3. Verify voltage check on TB102-1 and TB202-1 (Refers to illustration).

    1. If system checks are good, continue with next step.
    2. If fault remains, repair defective wiring as required and do close out.

  4. Remove SLC 1 and disconnect K15-X1, K15-X2, K15-Y1, K15-Y2, K15-Y11 and K15-12.
  5. Perform a continuity check between the connections as follows:

    From To Result
    K15-Y2 (lug) Ground
    K15-X2 (lug) Ground
    K15-12 (lug) Ground

    1. If there is continuity, go to step 10.
    2. If there is no continuity, continue with next step.

  6. Perform a continuity check as follows:

    From To Result
    K15-11 (lug) Ground

    1. If there is continuity, go to step 10.
    2. If there is no continuity, continue with next step.

  7. Check the connection of the TB102-3.

    1. If the connections are correct, go to step 10.
    2. If the connections are not correct, repair the connections and continue with next step.

  8. Perform a continuity check between the connections as follows:

    From To Result
    K15-Y2 (lug) SLC 1 P111A-10
    K15-X2 (lug) SLC 1 P111A-11
    K15-12 (lug) SLC 1 P111C-19

    1. If there is continuity, continue with next step.
    2. If there is no continuity, go to step 10.

  9. Replace contactor K15.

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

  10. Replace ACPC.
  11. Do close out.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.