09/25/20
Message Overview:
Fault Message:
ACPC GTC 1/GTC 7 CONTACTOR-K4 FAIL
Fault Code:
2451343ACP
Associated CAS:
| 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 ] 24-51-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
AC Power Center (ACPC) Primary Logic Cards (PLC) detects a discrepancy between coil drive status and auxiliary contact status of the Contactor K4.
Possible Causes:
- Contactor (K4)
- AC Power Center (ACPC) Motherboard
- Electromagnetic Interference (EMI) Filter
- AC Power Center (ACPC) TB601
- AC Power Center (ACPC) TB202
- AC Power Center (ACPC) TB101
- Electronic Module 1 (EM1)
- Primary Logic Card (PLC)
- 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:
- Disconnect contactor K4 connector P104 on ACPC.
- Turn the BATT MSTR SW to ON.
- Perform a check for 28 VDC as follows:
From To Result P104-1 Ground P104-2 Ground - If there is 28 VDC, go to step 5.
- If there is no 28 VDC, continue with next step.
- Perform wiring checks between EM1, TB202-2 and TB101-1.
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Turn the BATT MSTR SW to OFF.
- Perform a continuity check as follows:
From To Result P104-13 Ground P104-11 Ground - If there is continuity, go to step 8.
- If there is no continuity, continue with next step.
- Perform wiring checks as follow:
From To Result TB601-4 TB101-3 - If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Remove PLC 1, PLC 2 and PLC 3.
- Perform a continuity check with the connections that follows:
From To Result P104-14 Ground P104-12 Ground P104-22 Ground P104-3 Ground - If there is continuity, go to step 15.
- If there is no continuity, continue with next step.
- Replace contactor K4.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Re-install PLC 2 and PLC 3
- If system checks are good, go to step 14.
- If fault remains, continue with next step.
- Replace PLC 2.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace PLC 3.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace PLC 1.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace ACPC.
- Do close out.