Fault Message:

GEN2 [INCORRECT PHASE SEQUENCE]

Fault Code:

2422119LPS

Associated CAS:

GEN 2 FAIL
(Advisory)

Variable Frequency Generator (VFG) 2 will not come on-line.

• 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. At the VFG 2, do a check of the output connections at the terminal block. Reconnect as required.

   Connection	Color
   T1	White
   T2	Blue
   T3	Orange
   G	Green

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

2. At the ACPC, do a check of the VFG 2 output connection at the LCTA 2. Reconnect as required.

   Connection	Color
   T4	White
   T5	Blue
   T6	Orange

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

3. Swap GCU 2 with GCU 3 (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 do close out.
   2. If fault remains, continue with next step.

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