Auto-Decelerator Does Not Operate Properly - Komatsu PC200-8M0 Shop Manual

400 Troubleshooting of electrical system (E-mode)
E-14 Auto-decelerator does not operate properly
E-14 Auto-decelerator does not operate properly
1) When auto-decelerator switch is operated, auto-decelerator monitor does not light up or does
Failure
not go off.
q
Related information
Cause
1 Defective machine monitor
Failure 2) Auto-decelerator is not operated or canceled with lever.
q
Related information
q
Cause
1 Defective PPC oil pressure signal
2 Defective machine monitor
3 Defective pump controller
4 Defective engine controller
PC200, 200LC, 220, 220LC-8M0
Condition of signal of auto-decelerator switch can be checked with monitoring function.
(Code: 04504 Monitor 1st, 2nd line switches)
Machine monitor may be defective. (Since this is an internal defect, trouble-
shooting cannot be performed.)
Since set speed of auto-decelerator is 1,050 rpm, it is not operated or canceled if fuel control
dial is set below this speed.
Auto-deceleration does not function in arm crane mode (L) for machines with arm crane.
a Start engine and perform troubleshooting (with monitoring function).
Monitoring code
01900
Pressure switch 1
01901
Pressure Switch 2
If display of monitor is incorrect, perform troubleshooting for "E-26 - 34 Moni-
toring function does not display *** properly".
If no problem is found in check on cause 1, machine monitor may be defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
If no problem is found in checks on causes 1 and 2, pump controller may be
defective (Since this is an internal defect, troubleshooting cannot be per-
formed.)
If no problem is found in checks on causes 1 and 3, engine controller may be
defective. (Since this is an internal defect, troubleshooting cannot be per-
formed.)
Procedure, measuring location, criteria and remarks
Procedure, measuring location, criteria and remarks
Item
Swing
Travel
Boom LOWER
Boom RAISE
Arm IN
Arm OUT
Bucket CURL
Bucket DUMP
Service
SEN06138-00
Correct display
When lever is operated:
ON
When lever is in neutral:
OFF
When lever is operated:
ON
When lever is in neutral:
OFF
33
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