Komatsu PC130-8 User Manual

SEN04119-01 40 Troubleshooting
10 PC130-8
Failure code [B@BCNS] Eng coolant overheat 1
User code Failure code
Trouble
Engine coolant overheat
(Engine controller system)
— B@BCNS
Contents of
trouble
• While engine was running, signal circuit of engine coolant temperature sensor detected overheating
of engine coolant (above about 102°C).
Action of
controller
• Displays engine coolant temperature monitor with red on machine monitor.
• If cause of failure disappears, system resets itself.
Problem that
appears on
machine
• If machine is operated as it is, engine may be seized.
Related
information
• Engine coolant temperature sensor signal is input to engine controller and then transmitted to
machine monitor.
• Engine coolant temperature can be checked with monitoring function
(Code: 04107 Engine coolant temperature)
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Overheating of engine
coolant (when system is nor-
mal)
Engine coolant may be overheating. Check it and remove cause if
it is overheating.
2
Defective engine coolant
temperature sensor system
If cause 1 is not detected, engine coolant temperature sensor sys-
tem may be defective. Carry out troubleshooting for failure codes
[CA144] and [CA145].

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English