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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
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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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03/01/19

Message Overview:

Fault Message:

GEN4 ROTOR DIODE FAILURE

Fault Code:

2424199LPS

Associated CAS:

None

Reporting LRU: Generator Control Unit (GCU) 4
System Description: 24-21-00
Schematic Diagram: 24-21-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-21-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Continuous monitoring in Generator Control Unit (GCU) 4 has detected an open circuit on the Rotor Diode of Variable Frequency Generator (VFG) 4, consequently resulting in Generator 4 being tripped off-line or not come on-line.

Possible Causes:

  • Generator Control Unit (GCU) 4 (A59)
  • Variable Frequency Generator (VFG) 4 (G4)

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 GCU 1, GCU 2, GCU 3, GCU 4 and the APU GCU into a different position (for troubleshooting only). You can monitor the GCU faults in the CAIMS via the fault messages page.

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:

  1. Swap GCU 4 with GCU 3 (physically or using the GCU patch cable). Is the fault still present?

    1. If NO, replace GCU 4 and do close out.
    2. If YES, continue with next step.

  2. Replace VFG 4.
  3. Do close out.

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