I'm up to heat tightening step on the guide https://e3d-online.dozuki.com/Guide/Lite6+Assembly/2?revisionid=HEAD#s36 I'm unable to reach 240, heating failed. It reaches about 200. On the PID Autotune step before I did M303S210 because I'll be printing mostly at that temp. That was successful. Unable to reach 240 I thought I shall redo PID with S240, but now PID failed, timeout. What are the next steps in troubleshooting?