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AUTO SCR CLEANING
The AUTO SCR CLEANING occurs automatically about every 30 h and does not require any operator interaction.
During the AUTO SCR CLEANING, the excavator can and should be operated. By applying a working load, the
duration of the AUTO SCR CLEANING is reduced.
The AUTO SCR CLEANING process should take around 10 – 15 min if the machine is working.
However, the duration of the AUTO SCR CLEANING depends on the outside temperature, engine coolant temper-
ature and engine load. For example, colder outside temperature will increase the amount of time to complete the
AUTO SCR CLEANING.
When the AUTO SCR CLEANING starts, the SCR
CLEANING icon appears in green, an alarm sounds for
approximately 2 s and the message AUTO SCR CLEAN-
ING is displayed. The picture shows the display of the
rear camera view operating mode, and the display of the
rear and right-side camera view operating mode.
NOTE: If the engine is left running at low idle speed for
some time during AUTO SCR CLEANING, the machine
control system will raise the engine speed automatically
to support the completion of the process.
When the AUTO SCR CLEANING completes, the green
SCR CLEANING icon and the message AUTO SCR
CLEANING disappear.
The AUTO SCR CLEANING is suspended if any of the following occurs:
• The SCR cleaning button is pressed by the operator. The SCR CLEANING icon disappears and the message PUSH
SCR SWITCH TO ACTIVATE is displayed. Pressing the SCR cleaning button again will resume the process.
• The coolant temperature drops below 65 °C (149 °F). The SCR CLEANING icon starts to flash in green and a
warning alarm sounds for approximately 2 s. When the engine coolant temperature is above the 70 °C (158 °F),
AUTO SCR CLEANING will be resumed.
• The coolant temperature rises above 100 °C (212 °F). The SCR CLEANING icon starts to flash in green and a warn-
ing alarm sounds for approximately 2 s. Lower the engine speed throttle to idle and check the coolant temperature.
If the engine coolant temperature drops below 90 °C (194 °F), the AUTO SCR CLEANING will be resumed.
NOTE: Never keep normal machine operation with the AUTO SCR CLEANING process being suspended. The SCR
system will be damaged. Resume the AUTO SCR CLEANING process immediately.
NOTICE: If the AUTO SCR CLEANING is not completed after 8 h, the SCR CLEANING icon will flash in orange and
the MANUAL SCR CLEANING will be requested. If normal machine operation is kept when the SCR CLEANING icon
is flashing in orange, serious damages to the engine and to the after treatment system will occur. Immediately move
the excavator to a well ventilated area and activate the MANUAL SCR CLEANING.
3 - CONTROLS AND INSTRUMENTS
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