Komatsu PC138US-11 Operation & Maintenance Manual page 183

OPERATION EXPLANATION OF COMPONENTS
To prevent deterioration of the aftertreatment devices, the ex-
haust gas temperature rises automatically, which is regenera-
tion. During regeneration, the aftertreatment devices regenera-
tion display (1) comes on in the indicator lamp.
When the engine is idled for long periods of time, regeneration
will occur more frequently. This is not an error in regeneration.
When regeneration performance caution lamp (2) comes on,
stop the machine in a safe area and start manual stationary re-
generation.
Depending on the urgency, two steps to request manual sta-
tionary regeneration are started.
Stop the engine during regeneration. Run the engine for about
5 minutes at low idling RPM.
When you press F6 on the main menu screen, the machine
monitor shows "Aftertreatment Devices Regeneration" screen
in the user menu.
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