Fault Code n:xx, u:xxx, d:xx: It is the version information of the controller.
Fault: It is the version information of the controller.
LG Dishwasher displaying error code? If you have a newer LG dishwasher, you may see error codes show on the digital display. An error code is the computers diagnostic system telling you there is a problem. The specific error code will tell you what is wrong with your dishwasher.