Komatsu PC130-7, Руководство по ремонту

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20-306
PC130-7
TROUBLESHOOTING
(1)
Troubles which occur when solenoid power supply of governor and pump controller is
defective
a
The solenoid power supply (FB1-2) of the governor and pump controller is used by the controller to drive the
solenoids and relays.
a
Accordingly, if the solenoid power supply is turned off, when the controller outputs the power to the sole-
noids or relays, the power is not supplied to any of the solenoids and relays and all or some of the following
error codes are displayed simultaneously.
•
[E213]: Disconnection in swing holding brake solenoid
• [E215]: Disconnection in 2-stage relief solenoid
• [E216]: Disconnection in travel speed shifting solenoid
• [E222]: Disconnection in LS-EPC solenoid
• [E223]: Disconnection in PC-EPC solenoid
a
If the above problems occur, check the related fuse (FB1-2) and inlet voltage of the governor and pump con-
troller.
1) Disconnect connector C03 of the controller and connect a T-adapter to the wiring harness side.
2) Turn the starting switch ON.
3) Measure the voltage between each of pins (2) and (12) and each of pins (31), (32), and (33).
• Pins (2) and (3) are the power supply pins and pins (31), (32), and (33) are the ground pins.
• Pins (2) and (3) are the power supply and pins (31), (32), and (33) are the chassis ground.
• If the voltage is 20
–
30 V, it is normal.
a
Power supply connector (C03) of governor and pump controller
BEFORE CARRYING OUT TROUBLESHOOTING WHEN CODE IS DISPLAYED