Komatsu Galeo PC850-8 User Manual

38 PC800, 850-8
SEN00790-02 40 Troubleshooting
Failure code [CA154] Chg Air Temp Sensor Low Error
Failure code [CA187] Sens Supply 2 Volt Low Error
Action code Failure code
Trouble
Chg Air Temp Sensor Low Error
(Engine controller system)
E15 CA154
Contents of
trouble
• Low temperature error occurred in charge air temperature sensor circuit.
Action of
controller
• Fixes charge air temperature (air intake temperature) at 70°C and continues operation.
Problem that
appears on
machine
• Starting performance of the engine lowers during low temperature.
Related
information
• The signal voltage of the charge temperature (boost temperature) sensor can be checked with the
monitoring function. (Code: 18501 Boost temperature sensor voltage)
• Duplication of failure code: turn ON the starting switch.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
Carry out troubleshooting for failure code [CA153].
Action code Failure code
Trouble
Sens Supply 2 Volt Low Error
(Engine controller system)
E15 CA187
Contents of
trouble
• Low voltage error occurred in sensor power supply 2 (5V) circuit.
Action of
controller
• Engine Bkup speed sensor operates with signal from engine Ne speed sensor.
• Oil pressure sensor sets oil pressure to default (250 kPa {2.5 kg/cm
2
}) and continues operation.
• Ambient pressure sensor sets ambient pressure to default (52.44 kPa {0.53 kg/cm
2
}) and continues
operation.
• Charge air pressure sensor fixes charge pressure at 400 kPa {4.1 kg/cm
2
} and continues operation.
• EGR inlet pressure sensor sets EGR inlet pressure to default (102 kPa {1.0 kg/cm
2
}) and continues
operation.
• EGR valve lift sensor limits output, and closes EGR and bypass valves.
• Bypass valve lift sensor limits output, and closes EGR and bypass valves.
Problem that
appears on
machine
• Engine output lowers.
Related
information
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
Carry out troubleshooting for failure code [CA227].

Komatsu Galeo PC850-8 Specifications

General

Brand	Komatsu
Model	Galeo PC850-8
Category	Excavators
Language	English