Failure Code [B@Bcns] Eng Water Overheat - Komatsu PC210-8 Shop Manual

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