Komatsu Galeo PC800-8 User Manual

38 PC800, 850-8
SEN00792-02 40 Troubleshooting
Failure code [DW7JKA] Bottom Dump Priority Sol. Disc.
Action code Failure code
Trouble
Bottom Dump Priority Sol. Disc.
(Pump controller system)
— DW7JKA
Contents of
trouble
• When signal is output to bottom dump priority solenoid circuit, no current flows.
Action of
controller
• None in particular. (Since circuit is disconnected, current does not flow and solenoid does not operate.)
Problem that
appears on
machine
• Since bottom dump priority function does not work, bottom dump speed is low.
Related
information
• Operating condition (ON/OFF) of bottom dump priority solenoid can be checked with monitoring func-
tion. (Code 02301: Solenoid valve 2)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective bottom dump pri-
ority solenoid (Internal dis-
connection)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
V19 (male) Resistance
Between (2) – (1) 20 – 60 z
2
Disconnection in wiring har-
ness (Disconnection in wir-
ing or defective contact in
connector)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (28) –
V19 (female) (2)
Resistance Max. 1 z
Wiring harness between V19 (female) (1) –
CP03 (female) (3), (13), (23)
Resistance Max. 1 z
3
Hot short (Contact with 24V
circuit) in wiring harness
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between CP03 (female) (28) –
V19 (female) (2)
Voltage Max. 1 V
4 Defective pump controller
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
CP03 (female) Resistance
Between (28) – ground 20 – 60 z

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English