Komatsu 80001 User Manual

SEN04119-01 40 Troubleshooting
34 PC130-8
Failure code [CA154] Charge air temp. sensor low error 1
Failure code [CA155] Chg air temp high speed derate 1
User code Failure code
Trouble
Charge air temp. sensor low error
(Engine controller system)
E15 CA154
Contents of
trouble
• Low voltage was detected in charge (boost) temperature sensor circuit.
Action of
controller
• Fixes charge (boost) temperature (intake air temperature) (70°C) and continues operation.
Problem that
appears on
machine
Related
information
• Signal voltage of charge (boost) temperature sensor can be checked with monitoring function.
(Code: 18501 Boost temperature sensor voltage)
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
Carry out troubleshooting failure code [CA153].
User code Failure code
Trouble
Charge air temperature high speed derate
(Engine controller system)
E11 CA155
Contents of
trouble
• Temperature signal of charge (boost) pressure/temperature sensor exceeded control upper temper-
ature limit.
Action of
controller
• Limits output and continues operation.
Problem that
appears on
machine
• Engine output lowers.
• Engine stops.
Related
information
• Charge (boost) temperature can be checked with monitoring function. (Code: 18500 Boost temper-
ature)
• 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
Lowering of cooling perfor-
mance of aftercooler
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
2
Abnormal rise of turbo-
charger outlet temperature
Outlet temperature of turbocharger may be abnormally high.
Check related parts directly.
3 Defective engine controller
If causes 1 – 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English