HomeForumsMitsubishi ElectricFault CodesMitsubishi 4230 Error Code This topic is empty. Viewing 1 post (of 1 total) Author Posts August 3, 2024 at 11:11 am #1691 TheAChubKeymaster Premium Code Text Description Cause Check Procedure 4230 High temp on Heat sink on inverter. Blockage in air passage of inverter heatsink, Inverter board failure, inverter fan failure. Check blockages in air duct failure of INV fan or failure of thermistor. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In