The process starts on it's own. That's just a light so you know the regen is going on. Once it finishes, the light goes away.
^^^This^^^
The process starts on it's own. That's just a light so you know the regen is going on. Once it finishes, the light goes away.
The buttons are there for when you want to cancel the regen if you're working on highly inflamable stuff like hay, straw and so on. Since the DPF is getting cleaned, it can throw some really hot particles out of the exhaust, which is a bad combination with straw.
Do a search on emission stuff on this forum. You'll find loads of threads about these subject. Once you read it, you'll understand much better what the tractor is doing and why the thing decided to clean.
The problems with emissions we often read here, are caused by the owners not running the tractors hard enough or from the owners cancelling too many regens. Then the DPF will get plugged more and more over time.
EDIT: Was going through the RK55 manual, they also mentioned on another page that the light means that the exhaust is over 400 degrees. Basically meaning that you're working the tractor hard enough for the DPF to be happy.
Just to be clear. That light doesn't mean that you have a problem on your tractor. According to the manual, there is another light if there is a in fact a problem or malfunction.