Doosan DX700LC Operation And Maintenance Manual page 97

9. Engine Coolant Temperature Warning
Light
If engine coolant overheats, this light will turn "ON", an
alarm will sound, and the engine speed will be
automatically reduced, until coolant temperature drops. Do
not turn engine "OFF" because this will cause coolant
temperature to rise and may cause engine to siege due to
heat surge.
NOTE:
Check the engine coolant temperature gauge. If
the gauge pointer moves into the red zone, the
engine coolant temperature warning light will
turn "ON", a warning buzzer will sound, and the
engine speed will be automatically reduced.
Allow the engine to run at low idle speed until
the temperature gauge registers in the blue
zone again. When the blue zone is reached,
allow the engine to idle for an additional three -
five minutes before shutting down the engine. If
not allowed to idle, heat surge may develop
which will damage the engine. Allowing the
engine to idle will dissipate heat. Check the
coolant level, look for a loose fan belt, inspect
for debris around radiator, and so on.
When the temperature reaches the normal
range, the engine speed will automatically
recover.
10. Engine Check Warning Light
This indicator light will turn "ON", when the engine needs to
be check.
NOTE: If this light turns "ON" stop the machine and
repair the cause of the fault.
Operating Controls
Figure 49
CHECK
Figure 50
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