07/01/19
Message Overview:
Fault Message:
ASCA FAILED (LEVEL A) / POWER UP
Fault Code:
2463001DCP
Associated CAS:
| Reporting LRU: | DC Power Center (DCPC) |
| System Description: | 24-60-00 |
| Schematic Diagram: | 24-61-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 24-61-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
- The DC Power Center (DCPC) Primary Logic Cards (PLCs) detect a discrepancy between the Auxiliary Power Unit (APU) Start Contactor Assembly (ASCA) Solid State Power Controller (SSPC) 5 status and its commanded state
- The ASCA SSPC 5 status and its commanded state are in agreement (both indicate off state) but voltage is still present on the SSPC 5 output
Possible Causes:
- Auxiliary Power Unit (APU) Start Contactor Assembly (ASCA) (A48)
- DC Power Center (DCPC) (A63)
- Circuit Breaker (CB-D2)
- DC Power Center (DCPC) Primary Logic Card (PLC) 1
- DC Power Center (DCPC) Primary Logic Card (PLC) 2
- DC Power Center (DCPC) Primary Logic Card (PLC) 3
- DC Power Center (DCPC) Diode (D5)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Before performing any action, do a complete aircraft power OFF
- AC power OFF (EXT power cord disconnected)
- Battery Master Switch (BMS) OFF
Quick Links:
| Removal of the DC Power Center (DCPC) | AMM 24-61-00-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the DC Power Center (DCPC) | AMM 24-61-00-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the DC Power Center (DCPC) Diodes (D4 and D5) | AMM 24-61-49-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the DC Power Center (DCPC) Diodes (D4 and D5) | AMM 24-61-49-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the APU Starter-Contactor Assembly | AMM 24-62-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the APU Starter-Contactor Assembly | AMM 24-62-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| DC Power Center (DCPC) assembly | CMM 24-61-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Set battery master switch (BMS) to ON. (EXT power cord disconnected).
- Get access to the Signboard menu and check DCPC IN label 360. (Only bit in gray need to be look at).
For DCPC IN label 360.- If bit 24 is set to 0, go to step 11.
- If bit 24 is set to 1, continue with next step.
- Get access to the APU Battery and disconnect connector A89P2.
- Get access to the ASCA and disconnect connector A48P2.
- Make sure circuit breaker CB-D2 is set to 'IN' CCPB.
- Perform a continuity check as follows:
From To Result A48P2-S Ground - If there is no continuity, repair defective wiring as required and do close out.
- If there is continuity, continue with next step.
- Remove all 3 DCPC PLCs. Perform a continuity check as follows:
From To Result A48P2-B Ground A48P2-L Ground - If there is no continuity, go to step 11.
- If there is continuity, continue with next step.
- Get access to the DCPC and disconnect connector A63P1.
- Perform a wiring check as follows:
From To Result A48P2-B Ground A48P2-L Ground - If there is continuity, repair defective wiring as required and do close out.
- If there is no continuity, continue with next step.
- Replace the DCPC. Is the fault still present?
- If NO, do close out.
- If YES, continue with next step.
- Get access to the APU Battery and make sure connector A89P2 is disconnected.
- Apply AC electrical power to the aircraft.
- Perform a 28 VDC voltage check at ASCA connection E4.
- If voltage is not present, go to step 15.
- If voltage is present, continue with next step.
- Refer to SmartFix Plus CAIMS message 2460450DCP DCPC diode 5 for additional troubleshooting.
- Replace the ASCA.
- Do close out.