Board Combination Fault

What does E.CMB mean?

This fault indicates that the installed circuit board is either incompatible with the specific inverter model or is not correctly seated/connected within the inverter. The inverter will cease operation to prevent potential damage. An incorrect or improperly connected board can lead to system malfunction or inability to perform intended functions.

Complete Troubleshooting Guide

1. 1

   Power down the inverter, then physically inspect and firmly reseat all installed circuit boards to ensure proper connection.

2. 2

   Verify that the installed circuit board is the correct model and compatible with the specific inverter series (e.g., FR-E800).

3. 3

   If the fault persists after re-seating and verifying compatibility, contact your sales representative or technical support for further diagnosis and potential board replacement.