Toggle theme Top Link Home Blogs Community All Tools Services Error Code Unlocking Code Gas Chart Expolore Repair Skills IFB AC Error Code List | Repair Skills By Amarjeet Kumawat 0 IFB air conditioners are reliable appliances, but encountering error codes is not uncommon. This guide will walk you through the troubleshooting steps for some common IFB AC error codes, ensuring you can address issues promptly and effectively. FAILURE TYPE ERROR CODE RECOVERY IDU PCB communication failure EO - CI Auto ODU PCB communication failure EO - CO Auto Indoor room temperature sensor failure ( IRT ) E1 Auto Indoor coil temperature sensor failure ( IPT ) E2 Auto Outdoor coil temperature sensor failure ( OPT ) E3 Auto AC Cooling system abnormal E4 Power ON / OFF IDU PG fan motor / DC fan motor works abnormal / failure E6 Power ON / OFF Outdoor ambient temperature sensor failure E7 Auto ODU discharge temperature sensor failure E8 Auto IPM / Compressor driving control abnormal E9 Power ON / ...