Main Circuit Error

What does E25. mean?

This fault signifies a critical error occurring within the inverter's main circuit board. It can be caused by significant electrical noise interference or an internal hardware defect. This type of error impacts the fundamental power conversion and control functions of the inverter, typically rendering it inoperable and requiring internal repair or replacement.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify proper grounding for the inverter and control panel to minimize noise susceptibility.

2. 4

   Check input power stability and transient suppression.