Failure Code [7Rf4Ky] Short Circuit In Feeder Forward Epc Valve - Komatsu Galeo BR380JG-1E0 Shop Manual

SEN02090-00

Failure code [7RF4KY] Short circuit in feeder forward EPC valve

User code Failure code
— 7RF4KY
Contents of • When feeder forward EPC valve solenoid is not driven, hot short (contact with 24 V circuit) is
trouble detected.
Action of • None in particular.
controller • If the cause of the failure disappears, the system resets itself.
Problem that
• The feeder does not stop operating forward.
appears on
• When this trouble is detected, the horn sounds (3 times intermittently).
machine
Related
• The failure history is recorded.
information
Hot short with wiring
Possible
1 harness (Contact with
causes and
24-V circuit)
standard value
in normal state
Defective work equip-
2 ment and pump con-
troller
Circuit diagram related to feeder forward EPC solenoid
48
Short circuit in feeder forward EPC valve
Trouble
(Work equipment and pump controller (work equipment control) system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with engine starting switch OFF, then turn engine starting
switch ON and carry out troubleshooting.
Between wiring harness between C03 (female)
(38) – A01 – V03 (female) (2) and chassis
ground
a If cause 1 is not detected, work equipment and pump controller may be
defective. (Since trouble is in system, troubleshooting cannot be carried
out.)
40 Troubleshooting
1
Voltage Max. 1 V
BR380JG-1E0