Komatsu PC130-8 User Manual

40 Troubleshooting SEN04121-02
PC130-8
25
Failure code [DV20KB] Travel alarm short circuit 1
Circuit diagram related
User code Failure code
Trouble
Travel alarm short circuit
(Pump controller system)
— DV20KB
Contents of
tro
uble
• Abnormal current flowed in the travel alarm circuit, when power is supplied to the circuit.
Action of
controll
er
• Power to the travel alarm circuit is switched OFF.
• Even after the failure cause disappears of itself, the machine operation does not return to normalcy,
un
less the engine starting switch is once turned OFF.
Problem that
ap
pears on
machine
• The travel alarm does not sound.
Related
information
• Operation of the travel alarm (ON or OFF) can be
checked in the monitoring function. 
(Code: 03
701 Controller output 2)
Possible causes
and
standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Travel alarm defective 
(Internal defect)
a T
urn the engine starting switch OFF for the preparations, and
keep the engine running during the troubleshooting.
M14 (female) Travel lever Voltage
Between (1) and (2)
Neutral Max. 1 V
Operated 20 – 30 V
If the above voltage is normal but the travel alarm does not oper-
ate, the travel alarm is defective.
2
Grounding fault of wiring har-
ness
(Contact with grounding cir-
cuit)
a T
urn the engine starting switch OFF for the preparations, and
hold it in the OFF position during the troubleshooting.
Between wiring harness between CP02
(fe
male) (107) and M14 (female) (1) and
grounding
Resis-
tance
Min. 1 Mz
3 Pump controller defective
a T
urn the engine starting switch OFF for the preparations, and
keep the engine running during the troubleshooting.
CP02 Travel lever Voltage
Between (107) –
ch
assis ground
Neutral Max. 1 V
Operated 20 – 30 V

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English