Komatsu H70051 Series Operation & Maintenance Manual page 91

OPERATION
DEF SYSTEM CAUTION LAMP
DEF system caution lamp alerts when abnormality in the sys-
tem are detected.
Whenever the caution lamp lights up in yellow or in red, take
necessary actions by instructions.
Fault conditions that result in activation of the Inducement strat-
egy for engine derates to prompt to maintain or repair the emis-
sion control system.
Lighting in red
With Action level "L04", Inducement status is "Severe Induce-
ment". Engine power is under heavy deration.
With Action level "L03", Inducement status is "Low level Inducement". Engine power is under deration.
Lighting in yellow
With Action level "L01", Inducement status is "Warning" or "Continuous Warning".
When "Continuous Warning", If no maintenance, advancing to the next Inducement status. Engine power will be
derated.
REMARK
For more information about the Inducement strategy, and Inducement status concerning engine power deration,
see "HANDLE UREA SCR SYSTEM WARNING (3-135)".
DEF SYSTEM HIGH TEMPERATURE STOP CAUTION LAMP
DEF system high temperature stop caution lamp alerts when
the times of engine is shut down under the condition of high de-
gree temperature of DEF system exceeds the defined number
of times.
Whenever the caution lamp lights up in yellow, it is necessary
to ask your Komatsu distributor to go off this caution lamp.
When stopping the engine, stop it after running it at low idle for
approximately 5 minutes. For details, see "METHOD FOR
STOPPING ENGINE (3-183)".
When stopping the engine during the aftertreatment devices re-
generation, stop the regeneration first according to "PROCE-
DURE FOR AFTERTREATMENT DEVICES REGENERATION DISABLE SETTING (3-132)", then stop the en-
gine after running it at low idle for approximately 5 minutes.
ENGINE SYSTEM CAUTION LAMP
If the operation is continued while the caution lamp is lit in red, accumulation and combustion of the
soot in KDPF are accelerated, and consequently the temperature of KDPF and exhaust gas can increase
high. Stop the engine immediately.
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WARNING
EXPLANATION OF COMPONENTS
3-25