3.1.2 PM warning level and required procedures for Auto Regeneration mode
During “Auto Regeneration” mode when the PM level has built up in the DPF, the regeneration cycle will begin
automatically. If the regeneration cycle is interrupted or the regeneration conditions are not satisfied, the buzzer starts
sounding and the indicator display changes in response to the PM level in order to prompt the operator to perform the
required procedure listed in the following table.
IMPORTANT :
• Once the regeneration level has been reached, immediately perform the required procedure for
regeneration.
Interrupting the regeneration cycle or continuing operation while ignoring the warning signs may cause
DPF and engine damage.
Auto regeneration mode
DPF system status
Required procedure
PM warning
level
Buzzer
Engine
output
Indicator
1 Not sounding sufficient
The regeneration indicator
starts flashing.
A specific amount of PM has accumulated in
the DPF muffler.
Continue to work the tractor to raise the DPF
temperature.
The Engine-RPM-increase-indi-
cator starts flashing.
Continue the work and increase the engine
rpm until the indicator turns “OFF”.
The regeneration indicator will
stop flashing and remain “ON”
constantly.
The regeneration cycle begins and continues
until cycle is complete then the indicator will
turn “OFF”.
If the regeneration cycle was interrupted or conditions are not satisfied for regeneration then DPF system is now in the PM warning Level 2.
2-1
Sounding every
5 seconds
sufficient
The regeneration indicator
starts flashing.
Start the regeneration, referring to the preced-
ing PM warning level 1.
Now the parked-regeneration-indicator starts
flashing, and the parked regeneration can also
be started.
If the conditions of regeneration are not met,
perform the procedure for parked regeneration
cycle.
(See Operating procedure for parked regener-
ation on page 56)
2-2
Sounding every
3 seconds
sufficient
The Engine-RPM-increase-indi-
cator starts flashing.
The parked-regeneration-indi-
cator starts flashing.
If the regeneration fails in the PM warning level 2, DPF system becomes in the PM warning Level 3.
3
Sounding every
1 second
50%
The engine-warning-indicator
starts flashing.
Immediately discontinue working the tractor
and begin the procedure for parked regenera-
tion cycle.
(See Operating procedure for parked regener-
ation on page 56)
At PM warning level 3, the “Auto Regenera-
tion” mode does not function.
If the tractor is operated further, the regenera-
tion cycle will be disabled.
The parked-regeneration-indi-
cator starts flashing.
If the parked regeneration is interrupted or the tractor is continuously operated in the PM warning level 3, DPF system becomes in the PM warn-
ing Level 4.
4
Sounding every
1 second
50%
The engine-warning-indicator
remains constantly “ON”.
Immediately move the tractor to a safe place,
park it there, and turn the engine “OFF”.
Contact your local KUBOTA Dealer.
• At PM warning level 4, do not continue to
operate the tractor. Otherwise, damage
will result to the DPF and engine.
EXHAUST AFTERTREATMENT DEVICES OPERATING THE ENGINE
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