Table of Contents
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40 Troubleshooting
Failure code [B@BCNS] Eng Water Overheat
User code
Failure code
—
B@BCNS
Contents of
• While engine was running, signal circuit of engine coolant temperature sensor detected overheating
trouble
of engine coolant (above about 102°C).
Action of
• Displays engine coolant temperature monitor with red on machine monitor.
controller
• If cause of failure disappears, system resets itself.
Problem that
appears on
• If machine is operated as it is, engine may be seized.
machine
• Engine coolant temperature sensor signal is input to engine controller and then transmitted to
machine monitor.
Related infor-
• Engine coolant temperature can be checked with monitoring function
mation
(Code: 04107 Engine coolant temperature)
• Method of reproducing failure code: Start engine.
Overheating of engine
Possible causes
1
coolant (when system is nor-
and standard
mal)
value in normal
state
Defective engine coolant
2
temperature gauge system
Failure code [B@BCZK] Eng Water Level Low
User code
Failure code
—
B@BCZK
Contents of
• When starting switch is turned ON (but engine is not started), signal circuit of radiator coolant level
trouble
sensor detected low radiator coolant level (sensor contact opened).
Action of
• Displays radiator coolant level monitor on machine monitor.
machine monitor
• If cause of failure disappears, system resets itself.
Problem that
appears on
• If machine is operated as it is, engine may overheats.
machine
• Condition of radiator coolant level switch can be checked with monitoring function
Related infor-
(Code: 04500 Monitor input 1)
mation
• Method of reproducing failure code: Turn starting switch ON.
Lowering of radiator coolant
Possible causes
1
level (when system is nor-
and standard
mal)
value in normal
state
Defective radiator coolant
2
level monitor system
PC210, 230, 240-8
Engine coolant overheat
Trouble
(Engine controller system)
Cause
Engine coolant may be overheating. Check it and remove cause if it
is 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 work normally" in E-mode.
Engine coolant level low
Trouble
(Machine monitor system)
Cause
Radiator coolant level may be low. Check it and add coolant if it is
low.
If cause 1 is not detected, radiator coolant level monitor system may
be defective. Carry out troubleshooting for "E-2 Basic check item
lights up when starting switch is turned ON (but engine is not
started)" in E-mode.
Standard value in normal state/Remarks on troubleshooting
Standard value in normal state/Remarks on troubleshooting
UEN00240-01
1
1
21
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the PC210-8 and is the answer not in the manual?
Questions and answers
E03 Dw45KB
E11(CA331)
Komastu pc210 not starting after changing injectors and fuel pump and common rail
The Komatsu PC210-8 may not be starting after changing the injectors, fuel pump, and common rail due to the following possible reasons:
1. Residual Fuel Pressure: The common rail fuel injection system requires the residual fuel pressure to be fully released before working on the fuel system. If this step was not followed, it may cause issues with fuel delivery.
2. Defective Electrical System: If the electrical system is not functioning properly, the engine may not receive the necessary signals for fuel injection timing.
3. Insufficient Fuel Supply: There might be an issue with fuel delivery, such as clogged filters, air trapped in the fuel lines, or improper priming of the fuel system after component replacement.
4. Insufficient Air Intake: A clogged air cleaner may restrict airflow, preventing proper combustion.
5. Improper Fuel Selection: Using incorrect fuel or contaminated fuel can affect engine starting performance.
Additionally, the common rail system requires the crankshaft to rotate up to two full turns before the engine starts, which is a normal operation characteristic. Checking for failure codes like [CA559] and [CA2249] can help diagnose the issue further.
This answer is automatically generated
engine overheating
To fix engine overheating issues in a Komatsu PC210-8, follow these steps:
1. Check Coolant Levels – Ensure the radiator and coolant reservoir have the correct amount of coolant.
2. Inspect the Radiator – Clean any debris blocking airflow and check for leaks.
3. Examine the Cooling Fan – Verify that the fan is functioning properly and is not damaged.
4. Inspect the Water Pump – Ensure the water pump is circulating coolant correctly.
5. Check the Thermostat – Replace if it is stuck closed.
6. Inspect Hoses – Look for any leaks, cracks, or blockages in the hoses.
7. Examine the Hydraulic Oil Cooler – Clean or replace if clogged.
8. Check Engine Load – Avoid excessive loads that may cause overheating.
9. Inspect the Aftercooler – Clean or replace if necessary.
10. Verify Fuel Injector Operation – Malfunctioning injectors can lead to overheating.
If overheating persists after these checks, consider professional inspection and repair.
This answer is automatically generated