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UEN00240-01
Failure code [CA155] Chg Air Temp High Speed Derate
User code
Failure code
E11
Contents of
• Temperature signal of boost pressure/temperature sensor exceeded control upper temperature limit.
trouble
Action of
• Limits output and continues operation.
controller
Problem that
• Engine output lowers.
appears on
• Engine stops.
machine
Related infor-
• Boost temperature can be checked with monitoring function. (Code: 18500 Boost temperature)
mation
• Method of reproducing failure code: Start engine
Lowering of cooling perfor-
1
Possible causes
mance of aftercooler
and standard
value in normal
state
Abnormal rise of turbo-
2
charger outlet temperature
3 Defective engine controller
40
Trouble
CA155
Cause
Charge air temperature high speed derate
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Cooling performance of aftercooler may be low. Check following
points directly.
• Looseness and breakage of fan belt.
• Insufficiency of cooling air
• Clogging of aftercooler fins
Outlet temperature of turbocharger may be abnormally high. Check
related parts directly.
If causes 1 – 2 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
40 Troubleshooting
1
PC210, 230, 240-8
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Table of Contents
Troubleshooting
