Komatsu PC210-8, Руководство по ремонту

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40 Troubleshooting UEN00244-02
PC210, 230, 240-8
27
E-8 Emergency stop item lights up while engine is running 1
Trouble (1) Engine coolant temperature monitor lights up red.
Related infor-
mation
• Signals of engine coolant temperature sensor are input to engine controller and then transmitted to
machine monitor through communication system.
• Engine coolant temperature can be checked with monitoring function.
(Code: 04107 Engine coolant temperature)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Overheating of engine cool-
ant (when system is normal)
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
(overheating).
• Lighting up blue: Engine coolant temperature is proper.
2
Defective engine coolant
temperature gauge system
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.
Trouble (2) Hydraulic oil temperature monitor lights up red.
Related infor-
mation
• Signals of hydraulic oil temperature sensor are input to pump controller and then transmitted to
machine monitor through communication system.
• Hydraulic oil temperature can be checked with monitoring function.
(Code: 04401 Hydraulic oil temperature)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Overheating of hydraulic oil
(when system is normal)
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.
2
Defective hydraulic oil tem-
perature gauge system
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.
Trouble (3) Engine oil pressure monitor lights up red.
Related infor-
mation
• Signals of engine oil pressure switch are input to engine controller and then transmitted to machine
monitor through communication system.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Lowering of engine oil pres-
sure (when system is nor-
mal)
Engine oil pressure may be low. If it is low, carry out troubleshooting
for S-12 Oil pressure lowers.
2
Defective engine oil pressure
switch system If cause 1 is not detected, engine oil pressure gauge system may be
defective. Carry out troubleshooting for failure code [
CA435 ].