Komatsu Galeo PC800-8 User Manual

PC800, 850-8 17
40 Troubleshooting SEN00793-02
E-4 Auto-decelerator does not operate
Failure
phenomenon
• The auto-decelerator does not operate.
Relative
information
• Since the auto-decelerator is set to 1,400 rpm, it does not operate if the fuel control dial is not set above
this level.
• Check the display on the monitor panel while the engine is running.
• If the display on the monitor panel is abnormal, carry out troubleshooting in “*** is not displayed normally
in monitoring function”.
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1
Defective boom RAISE signal
Monitoring code Item Normal display
01900
Pressure switch 1
Boom RAISE
Lever operated: ON
Lever in neutral: OFF
2
Defective boom LOWER
signal
Monitoring code Item Normal display
01900
Pressure switch 1
Boom LOWER
Lever operated: ON
Lever in neutral: OFF
3 Defective arm IN signal
Monitoring code Item Normal display
01900
Pressure switch 1
Arm IN
Lever operated: ON
Lever in neutral: OFF
4 Defective arm OUT signal
Monitoring code Item Normal display
01900
Pressure switch 1
Arm OUT
Lever operated: ON
Lever in neutral: OFF
5
Defective bucket CURL
signal
Monitoring code Item Normal display
01901
Pressure switch 2
Bucket CURL
Lever operated: ON
Lever in neutral: OFF
6
Defective bucket DUMP
signal
Monitoring code Item Normal display
01901
Pressure switch 2
Bucket DUMP
Lever operated: ON
Lever in neutral: OFF
7 Defective swing signal
Monitoring code Item Normal display
01900
Pressure switch 1
Swing
Lever operated: ON
Lever in neutral: OFF
8 Defective left travel signal
Monitoring code Item Normal display
01901
Pressure switch 2
Left travel
Lever operated: ON
Lever in neutral: OFF
9 Defective right travel signal
Monitoring code Item Normal display
01900
Pressure switch 1
Right travel
Lever operated: ON
Lever in neutral: OFF
10 Defective service signal
Monitoring code Item Normal display
01901
Pressure switch 2
Service
Lever operated: ON
Lever in neutral: OFF
11 Defective pump controller
If causes 1 – 10 are not detected, the pump controller may be defective.
(Since trouble is in the pump controller, troubleshooting cannot be carried out.)
12 Defective engine controller
If causes 1 – 10 are not detected, the engine controller may be defec-
tive.
(Since trouble is in the pump controller, troubleshooting cannot be carried out.)

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English