Error Code [223] (Disconnection In Ls-Epc Solenoid) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [223] (Disconnection in LS-EPC solenoid)

User code Error code
– 223
Contents of
• No current flows in the LS-EPC solenoid circuit
trouble
Action of • None in particular (Since no current flows, the solenoid does not operate).
controller • If the cause of the failure disappears, the system resets itself.
Problem that
• The travel speed is fast at Lo. Amount of flow is large at model B. (The set pressure of the LS valve
appears on
cannot be controlled)
machine
Related • The output state (current) to the LS-EPC solenoid can be checked with the monitoring function.
information (Code: 015, by 10 mA)
Defective LS-EPC sole-
1
noid (Internal short circuit)
Disconnection in wiring
harness (Disconnection in
2
Possible causes
wiring harness or defective
and standard
contact in connector)
value in normal
state
Short circuit with power
3 source in wiring harness
(Contact with 24-V circuit)
Defective governor and
4
pump controller
Circuit diagram related to LS-EPC solenoid
PC130-7
Disconnection in LS-EPC solenoid
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between C03 (female) (6) and
V22 (female) (1)
Wiring harness between C03 (female) (3), (13),
(23), and V22 (female) (2)
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between C03 (female) (6) – V22 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (6) and (3), (13), (23)
V22 (male)
Between (1) and (2)
C03
[223]
Resistance
7 – 14 z
Max. 1 z
Resistance
Max. 1 z
Resistance
Voltage Max. 1 V
Resistance
7 – 14 z
20-339
(1)