Komatsu Galeo PC850-8 User Manual

8 PC800, 850-8
SEN00791-02 40 Troubleshooting
Failure code [CA452] Rail Press Sensor Low Error
Failure code [CA553] Rail Press High Error
Action code Failure code
Trouble
Rail Press Sensor Low Error
(Engine controller system)
E11 CA452
Contents of
trouble
• Low pressure error occurred in common rail pressure sensor circuit.
Action of
controller
• Limits output and continues operation (limits common rail pressure).
Problem that
appears on
machine
• Engine output lowers.
Related
information
• The signal voltage of the common rail pressure sensor can be checked with the monitoring function
(Code: 36401 Common rail pressure sensor voltage).
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
Carry out troubleshooting for failure code [CA451].
Action code Failure code
Trouble
Rail Press High Error
(Engine controller system)
E15 CA553
Contents of
trouble
• There is high pressure error (level 1) in common rail pressure sensor circuit.
Action of
controller
• None in particular.
Problem that
appears on
machine
• Engine output lowers.
Related
information
• Common rail pressure can be checked with monitoring function
(Code No. 36400: Common rail pressure).
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defect in related system If another failure code is displayed, carry out troubleshooting for it.
2 Use of improper fuel
Fuel used may be improper. Check it directly.
(Viscosity is high)
3
Defective electrical system
of common rail pressure
sensor
Electrical system of common rail pressure sensor may be defective.
Carry out troubleshooting for failure code [CA451].
4
Defective mechanical sys-
tem of common rail pres-
sure sensor
Mechanical system of common rail pressure sensor may be defective.
Check it directly.
5 Defective overflow valve
Spring damage, seat wear, or ball fixing of overflow valve is suspected.
Check it directly.
6 Clogged overflow piping Overflow piping may be clogged. Check it directly.
7 Defective pressure limiter Pressure limiter may be damaged mechanically. Check it directly.

Komatsu Galeo PC850-8 Specifications

General

Brand	Komatsu
Model	Galeo PC850-8
Category	Excavators
Language	English