I haven't had it run automatically since I did a manual cleaning at about 20 hours. It took about 30 minutes. Since I cannot get the parked cleaning to kick off I'm going to just leave it alone and wait for it to run automatically. As soon as the snow starts falling it shouldn't take long before it happens. So far it doesn't look like winter is coming this year in the northeast but I'm sure that'll all change. Happy Holidays!
I had the same problem with my 3033R. Having the tractor lock into a high idle speed is undesired for my use of the tractor on steep slopes with uneven terrain.
The first parked cleaning, staying ahead of the automatic cleaning, went without a hitch.
A second attempt after carbon built up again was refused.
After the tractor started locking into a high idle speed later on, when the carbon buildup reached 70%, it still refused to do a parked cleaning.
The operators manual is not completely clear on the matter, but the "parked cleaning" appears to be a last ditch opportunity to avoid
a "service cleaning" done by the dealer and not something to be routinely done by the operator.
The tractor will demand/allow it when the time comes, but you don't want to go there.
I didn't get any help from the dealer, again this is not documented well in the user or service manual.
The solution to the problem? When the tractor goes into automatic cleaning mode you can inhibit that to continue work without the fast idle,
but then you might want to clean the filter while conveniently parked. To do this, enable automatic cleaning while heading to the parking area, stop the tractor,
set the parking brake, turn the PTO off, and take it out of gear so you don't accidentally put it in gear without doing it in several gear boxes.
Then use the throttle lever to raise the engine speed to PTO speed. At that point the exhaust will get hot enough to start making progress on
cleaning the filter. You can see the progress using the display.
Once the display indicates any number below 40% the "automatic cleaning" demand with the high idle will be gone when you turn the tractor off and restart.
Taking it to 0% is a good idea, because you want to delay the next cleaning event for as long as possible, but you might be pressed to get back to work.
If you are dealing with flat ground and low fire hazard, automatic cleaning while you are working is very convenient.
If you are dealing with dangerous slopes, uneven ground, and high fire hazard, you might want to manage the cleaning yourself in a suitable location.
Using the technique described above, you can do that.