Komatsu PC210-8 Shop Manual page 855

40 Troubleshooting
Trouble (3) When left knob switch is released, work equipment power does not return to normal level.
Related infor-
• Condition of left knob switch signal can be checked with monitoring function.
mation
(Code: 02200 Switch input 1)
Possible causes
Hot short (Short circuit with
and standard 1
24V circuit) in wiring harness
value in normal
state
2 Defective pump controller
Circuit diagram related to 2-stage relief solenoid
PC210, 230, 240-8
Cause
a Prepare with starting switch OFF, then turn starting switch ON
Wiring harness between C02 (female) (109)
– V02 (female) (1)
If cause 1 is not detected, pump controller may be defective. (Since
trouble is in system, troubleshooting cannot be carried out.)
Standard value in normal state/Remarks on troubleshooting
and carry out troubleshooting.
UEN00244-02
Voltage Max. 1 V
43