Fault Message:

GEN2 CURRENT XFMR/WIRING FAULT

Fault Code:

2422121LPS

Associated CAS:

GEN 2 FAIL
(Advisory)

There is a failure in a Generator Current Transformer, a Line Current Transformer, or the wiring for a Main Generator.

• AC Power Center (ACPC) (A54)
• Generator Control Unit (GCU) 2 (A57)
• Variable Frequency Generator (VFG) 2 (G2)
• Associated Wiring

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.

1. Swap GCU 2 with GCU 1 (physically or using the GCU patch cable).
   NOTE: Use PMAT to monitor the fault on GCU.

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

2. Perform wiring checks between ACPC, GCU 2 and GEN 2.

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

3. Replace ACPC.

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

4. Replace GEN 2.
5. Do close out.