Our MA600HB had a similar error.
Turned out one of the Thermistor devices that is used for detecting and controlling thermal distortion was faulty.
There are parameters that will tell you which one is faulty.
Cannot recall which parameters are the ones you need, so... go hunting
Turn on all your parameters and scroll through the list looking for anything to do with thermal settings.
One of the pages will show you the values from the Thermistors. One of those will be showing very different readings from the others.
One of these pages also allows you to turn off the offending thermistor. Good only to do until it is replaced... not as a fix!
Once you know which one is faulty, it is up to you to find its location in the manuals and organise a replacement.
If I get a chance, I will have a look at the machine and see if I can find the info for you. (Don't hold your breath tho!)
Hope this helps.