Komatsu PC290LC-11 Operation & Maintenance Manual page 243

OPERATION
1.
Turn the key in starting switch (3) counterclockwise from OFF position (A). The preheating pilot lamp lights
up and preheating of the engine starts. (Preheating continues while the key in starting switch (3) is held
counterclockwise.)
The preheating pilot lamp starts flashing approximately 30
seconds after preheating starts and then goes out in ap-
proximately 10 seconds.
2.
After the preheating pilot lamp goes out, turn the key of
starting switch (3) to START position (C). The engine
starts.
If the engine cannot be started with the above procedure, wait for approximately 2 minutes, then start again
from step 1.
TURBOCHARGER PROTECTION FUNCTION
The turbo protect function protects the turbocharger by keeping the engine speed at approximately 1000 rpm or
less immediately after the engine is started.
• When the turbo protect function is actuated, the engine speed is held at approximately 1000 rpm or less,
regardless of the position of the fuel control dial.
• When the turbo protect function is actuated, the engine speed is held at approximately 1000 rpm or less,
even if the fuel control dial is operated.
• When the turbo protect function is canceled, the engine speed is set to the speed for the position of the fuel
control dial.
• The actuation time of the turbo protect function is limited to 20 seconds.
REMARK
White smoke may be discharged for a short time immediately after the engine is started or during the Aftertreat-
ment Devices Regeneration in the cold season, but this is not a failure.
AMBIENT TEMPERATURE RANGE FOR OPERATION AND STORAGE
• The recommended ambient temperature range for operation and storage is -20 to +45 °C.
• When operating in ambient below 0 °C, refer to "COLD WEATHER OPERATION (3-255)" for details of pre-
cautions.
MACHINE OPERATIONS AND CONTROLS
3-171