Komatsu 80001 User Manual

SEN04122-01 40 Troubleshooting
2 PC130-8
Failure code [DXA8KA] PC-EPC sol discon 1
User code Failure code
Trouble
PC-EPC solenoid system disconnection
(Pump controller system)
E02 DXA8KA
Contents of
trouble
• When PC-EPC solenoid was driven, disconnection was detected in circuit.
Action of
controller
• None in particular (Since no current flows, solenoid does not operate).
• If cause of failure disappears, system resets itself.
Problem that
appears on
machine
• If pump load increases, engine speed lowers largely and engine may stall.
Related
information
• Drive current of PC-EPC solenoid can be checked with monitoring function.
(Code: 01300 PC-EPC solenoid current)
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective PC-EPC solenoid
(Internal disconnection)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V11 (male) Resistance
Between (1) – (2) 7 – 14 z
2
Defective emergency pump
drive switch (Internal discon-
nection)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
S25 (male)
Emergency pump
drive switch
Resistance
Between (3) – (2)
Normal Max. 1 z
Emergency Min. 1 Mz
Between (6) – (5)
Normal Max. 1 z
Emergency Min. 1 Mz
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 CP02 (female) (96)
– S25 (female) (3)
Resis-
tance
Max. 1 z
Wiring harness between S25 (female) (2) –
V11 (female) (1)
Resis-
tance
Max. 1 z
Wiring harness between CP02 (female)
(115), (117), (120) – S25 (female) (6)
Resis-
tance
Max. 1 z
Wiring harness between S25 (female) (5) –
V11 (female) (2)
Resis-
tance
Max. 1 z
4 Defective pump controller
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (female) Resistance
Between (96) – (115), (117),
(120)
7 – 14 z

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English