06/25/19
Message Overview:
Fault Message:
GEN1 [INCORRECT PHASE SEQUENCE]
Fault Code:
2421119LPS
Associated CAS:
| Reporting LRU: | Variable Frequency Generator (VFG) 1 |
| System Description: | 24-21-00 |
| Schematic Diagram: | 24-21-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 24-21-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
Variable Frequency Generator (VFG) 1 will not come on-line.
Possible Causes:
- Generator Control Unit (GCU) 1 (A56)
- Variable Frequency Generator (VFG) 1 (G1)
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
A GCU patch cable (GSE REF # 24X-24-02) can be used to swap GCUs 1, 4 and 5 into position 2 or 3 (for troubleshooting only). The GCU NVMs can only be downloaded at position #2 or #3.
Quick Links:
| Removal of the Variable Frequency Generators (VFG) | AMM 24-21-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Variable Frequency Generators (VFG) | AMM 24-21-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Generator Control Units (GCU) | AMM 24-24-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Generator Control Units (GCU) | AMM 24-24-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- At the VFG 1, perform a check of the output connections at the terminal block. Reconnect as required.
Connection Color T1 White T2 Blue T3 Orange G Green - If system checks are good, do close out.
- If fault remains, continue with next step.
- At the ACPC, perform a check of the VFG 1 output connection at the LCTA 1. Reconnect as required.
Connection Color T1 White T2 Blue T3 Orange - If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace GCU 1.
NOTE: Use PMAT to monitor the fault on GCU. - Do close out.