I am getting an error message of C-E (only on port D )on my FM-203 soldering station. I have tried multiple soldering iron in the station (FM-2023 and FM-2030) and get the same error message. Port S works correctly when I plug in a FM-2027, but the FM-2027 will get the error message C-E when plugged into port D. Any suggestions?
Thanks for your help
Pedro