Failure Code [Dx16Ky] Fan Epc Solenoid: Hot Short - Komatsu WA250-6 Shop Manual

SEN03847-00

Failure code [DX16KY] Fan EPC solenoid: Hot short

Action code Failure code
E01 DX16KY
Contents of
• Since the fan EPC solenoid system is shorted with the power source, abnormal voltage is applied
trouble
when the fan EPC solenoid output is OFF.
Action of • Turns the output to the fan EPC solenoid OFF.
controller
• If problem is removed, system is returned to normal operating state.
Problem that
appears on
• The fan speed is minimized.
machine
• The output state (current) to the fan EPC solenoid can be checked with the monitoring function
Related
(Code: HST – 41400 – FAN EPC DIR).
information
• Method of reproducing failure code: Turn the starting switch ON.
Defective fan EPC solenoid
1
(Internal short circuit)
Possible causes
and standard
value in normal
state
Hot short in wiring harness
2
(Contact with 24V circuit)
3 Defective HST controller
Related circuit diagram
4
40-370
Fan EPC solenoid: Hot short
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1), (2) and ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between HST (female) (29) –
R29 (female) (1) and ground
• If causes 1 – 2 are not detected, HST controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
370 Troubleshooting by failure code (Display of code), Part 7
Failure code [DX16KY] Fan EPC solenoid: Hot short
Standard value in normal state/Remarks on troubleshooting
R29 (male)
Between (1) – (2)
1
Resistance
5 – 10 z
Min. 1 Mz
Voltage Max. 1 V
WA250, 250PZ-6