XFMR - Transformer connected to wrong grid

What does XFMR mean?

The inverter's internal transformer is configured for or connected to an incorrect type of grid. This is identified as a disturbance message.

• Incorrect grid connection wiring or configuration
• Wrong settings for Delta corner grounded grids
• Incorrect L1/L2 connections in unbalanced 208V/240V grids.

Click steps to track your progress.

1. 1

   If in Delta corner grounded grids, ensure the grid ground is correctly connected to terminal L2.

2. 2

   In unbalanced 208V and 240V grids, try interchanging the L1 and L2 connections.

3. 3

   Have a qualified electrician check the transformer connections and the grid type configuration of the inverter.

4. 4

   If the issue persists, contact SMA America for assistance.