24 PC800, 850-8
SEN00792-02 40 Troubleshooting
Failure code [DW41KB] Swing Priority Sol. S/C
Action code Failure code
Trouble
Swing Priority Sol. S/C
(Pump controller system)
— DW41KB
Contents of
trouble
• Abnormal current flew to the swing priority solenoid, when power was supplied to the circuit.
Action of
controller
• Power supply to the swing priority solenoid 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
• When the boom is raised and the machine is swung simultaneously in the swing priority mode, the
swing speed is low (the oil flow in the swing circuit is kept low).
Related
information
• Operation of the swing priority solenoid (ON or OFF) can be checked in the monitoring function.
(Code No. 02300: Solenoid 1)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Swing priority solenoid
defective
(Internal short-circuiting or
grounding fault)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
V14 (male) Resistance
Between (2) – (1) 20 – 60 z
Between (2) and grounding Min. 1 Mz
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) (38) – V14 (female) (2) 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
Swing priority switch
Left work equipment
control lever
Voltage
Between (38) – chassis
ground
OFF + NEUTRAL Max. 1 V
Swing priority mode
+
Swing operation
20–30V
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