WEG CFW-11 Frequency Inverter for 3PH, 600V, large HP fan motor went down the other day. Initial inspection found that a 125A fuse on the line side of the inverter was blown. Did a thorough inspection of unit and found nothing obvious. Replaced fuse and attempted to power up with the fan motor locked out. Display monitor on outside of panel failed to power-up. Checked fuses for the controls and verified that power was available to monitor yet it does not power-up.
Anyone familiar with this model? Any ideas what is preventing the display monitor from powering up?
Thank-you.
