Emergency Stop Item Lights Up While Engine Is Running - Komatsu PC130-8 Shop Manual

40 Troubleshooting
E-8 Emergency stop item lights up while engine is running
Trouble (1) Engine coolant temperature monitor lights up red.
• Signals of engine coolant temperature sensor are input to engine controller and then transmitted to
Related machine monitor through communication system.
information • Engine coolant temperature can be checked with monitoring function.
(Code: 04107 Engine coolant temperature)
Possible causes Overheating of engine cool-
1
and standard ant (when system is normal)
value in normal
state
Defective engine coolant
2
temperature gauge system
Trouble (2) Hydraulic oil temperature monitor lights up red.
• Signals of hydraulic oil temperature sensor are input to pump controller and then transmitted to
Related machine monitor through communication system.
information • Hydraulic oil temperature can be checked with monitoring function.
(Code: 04401 Hydraulic oil temperature)
Possible causes Overheating of hydraulic oil
1
and standard (when system is normal)
value in normal
state
Defective hydraulic oil tem-
2
perature gauge system
Trouble (3) Engine oil pressure monitor lights up red.
Related • Signals of engine oil pressure switch are input to engine controller and then transmitted to machine
information monitor through communication system.
Possible causes Lowering of engine oil pres-
and standard 1 sure (when system is nor-
value in normal mal)
state
Defective engine oil pressure
2
switch system
PC130-8
Cause Standard value in normal state/Remarks on troubleshooting
If monitor lights up red, engine coolant temperature may be high
(above about 102°C). Cool down engine coolant (Run engine at
low idle).
• Lighting up red: Engine coolant temperature is high
• Lighting up blue: Engine coolant temperature is proper.
Carry out troubleshooting for S-14 Coolant temperature becomes
too high (overheating).
If cause 1 is not detected, engine coolant temperature gauge sys-
tem may be defective. Carry out troubleshooting for E-9 Engine
coolant temperature gauge does not indicate normally.
Cause Standard value in normal state/Remarks on troubleshooting
If monitor lights up red, hydraulic oil temperature may be high
(above about 102°C). Cool down hydraulic oil (Run engine at low
idle).
• Lighting up red: Hydraulic oil temperature is high (overheating).
• Lighting up blue: Hydraulic oil temperature is proper.
If cause 1 is not detected, hydraulic oil temperature gauge system
may be defective. Carry out troubleshooting for E-10 Hydraulic oil
temperature gauge does not indicate normally.
Cause Standard value in normal state/Remarks on troubleshooting
Engine oil pressure may be low. If it is low, carry out troubleshoot-
ing for S-12 Oil pressure lowers.
If cause 1 is not detected, engine oil pressure gauge system may
be defective. Carry out troubleshooting for failure code [CA435].
(overheating).
SEN04123-01
1
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