Komatsu PC200-8M0 Shop Manual page 866

SEN06138-00
Failure 3) When L.H. knob switch is released, work equipment power is not returned to normal.
q
Related informa- Signal of L.H. knob switch can be checked with monitoring function.
tion (Code: 02200 Switch Input 1)
Cause
Hot short circuit in wiring
1 harness
(contact with 24 V circuit)
2 Defective pump controller
Circuit diagram related to 2-stage relief solenoid
44
40-400
E-22 One-touch power maximizing function does not operate properly
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V02 and connect T-adapters to female side.
3. Turn starting switch to ON position.
Between V02 (female) (1) and (2)
If no failure is found by check on cause 1, pump controller is defective. (Since this is
an internal defect, troubleshooting cannot be performed.)
400 Troubleshooting of electrical system (E-mode)
Voltage
PC200, 200LC, 220, 220LC-8M0
Max. 3 V