Komatsu 114E-3 Series - E-11 Code [155;CA155] Charge Air Press. High Speed Derate

SEN00459-01 40 Troubleshooting
20 114E-3 Series
E-11 Code [155/CA155] Charge Air Press. High Speed Derate 1
Error code Failure code
Trouble Derating of speed by abnormally high charge temperature
155 CA155
Contents of
trouble
• Temperature signal of boost pressure sensor and temperature sensor is above upper control limit.
Action of con-
troller
• Limits output and continues operation.
Problem that
appears on
machine
• Engine stops
• Output drops.
Related infor-
mation
—
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Drop in cooling performance
of aftercooler
Inspect following directly.
• Loose, broken fan belt
• Lack of cooling air
• Clogged aftercooler fin
2
Abnormally high tempera-
ture at turbocharger outlet
Inspect related parts directly.
3 Defective engine controller
If causes 1 and 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)