HomeForumsDaikinFault CodesDaikin C9 Error Code This topic is empty. Viewing 1 post (of 1 total) Author Posts July 7, 2024 at 1:49 pm #1072 TheAChubKeymaster Premium Remote Sensor Abnormality Error Code C9 Applicable Models FXTQ Method of Error Detection The error is detected out by temperature detected by remote sensor. Error Decision Conditions When the remote sensor becomes disconnected or shorted while the unit is running. Supposed Causes Defective indoor unit thermistor (R1T) for air inlet Defective indoor unit PCB 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