Komatsu PC130-8 User Manual

SEN04123-01 40 Troubleshooting
40 PC130-8
E-20 Power maximizing function does not operate normally 1
Circuit diagram related
Trouble
(1) When left knob switch is pressed, one-touch power maximizing monitor is not displayed.
(2) When left knob switch is pressed, work equipment power is not increased.
Related infor-
mation
• One-touch power maximizing function does not work when working mode is not power mode (P) or
economy mode (E).
• Condition of left knob switch signal can be checked with monitoring function.
(Code: 02200 Switch input 1)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defective fuse No. 9 If fuse is broken, circuit probably has ground fault. (See cause 4.)
2
Defective left knob switch
(Internal disconnection)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
S11 (male) Left knob switch Resistance
Between (1) – (2)
Released Min. 1 Mz
Pressed Max. 1 z
3
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01-9 – S11
(female) (1)
Resis-
tance
Max. 1 z
Wiring harness between S11 (female) (2) –
CP01 (female) (41)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01-9 – S11
(female) (1) and chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between S11 (female) (2) –
CP01 (female) (41) and chassis ground
Resis-
tance
Min. 1 Mz
5 Defective pump controller
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female) Left knob switch Resistance
Between (41) –
chassis ground
Released Min. 1 Mz
Pressed Max. 1 z
6 Defective machine monitor
Machine monitor may be defective. (Since trouble is in system,
troubleshooting cannot be carried out.)

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English