20 PC800, 850-8
SEN00792-02 40 Troubleshooting
Failure code [DV20KB] Travel Alarm S/C
Action code Failure code
Trouble
Travel Alarm S/C
(Pump controller system)
— DV20KB
Contents of
trouble
• Abnormal current flowed in the travel alarm circuit, when power is supplied to the circuit.
Action of
controller
• 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,
unless the engine starting switch is once turned OFF.
Problem that
appears 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 No. 03701: 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)
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
M14 (female) Travel lever Voltage
Between (1) – (2)
Neutral Max. 1 V
Operated 20 – 30 V
If the above voltage is normal but the travel alarm does not operate, the
travel alarm is defective.
2
Grounding fault of wiring
harness
(Contact with grounding cir-
cuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness between CP03
(female) (8) – M14 (female) (1) and grounding
Resistance Min. 1 Mz
3 Pump controller defective
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
CP03 Travel lever Voltage
Between (8) – chassis
ground
Neutral Max. 1 V
Operated 20 – 30 V
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