Error Code [222] (Short Circuit In Ls-Epc Solenoid) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [222] (Short circuit in LS-EPC solenoid)

User code Error code
– 222
Contents of
• An abnormal current flows in the LS-EPC solenoid circuit
trouble
• Reduces the output to the LS-EPC solenoid circuit 0.
Action of
• Even if the cause of the failure disappears, the system does not reset itself until the starting switch is
controller
turned OFF.
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)
Possible causes
Short circuit with chassis
and standard
ground in wiring harness
value in normal
2
(Contact with ground cir-
state
cuit)
Defective governor and
3
pump controller
Circuit diagram related to LS-EPC solenoid
20-338
(1)
Short circuit 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.
Between (1) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
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)
Between (6) and chassis ground
V22 (male)
Between (1) and (2)
C03
[222]
Resistance
7 – 14 z
Min. 1 Mz
Min. 1 Mz
Resistance
Resistance
7 – 14 z
Min. 1 Mz
PC130-7