Failure Code [Dx16Ka] Fan Pump Epc Sol. Disc - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DX16KA] Fan Pump EPC Sol. Disc.

Action code Failure code
E11 DX16KA
Contents of
• No current flows into hydraulic fan EPC solenoid circuit.
trouble
• If circuit is disconnected, power supply is turned OFF and fan pump is set to maximum swash plate
Action of
angle and fan may rotate at excessive speed. Accordingly, protection mode is selected to lower engine
controller
speed.
Problem that
appears on • Fan motor speed cannot be controlled.
machine
• When the fan EPC solenoid is disconnected or short-circuited, fan reverse rotation cannnot be done.
Related
• Output (Current) to EPC solenoid can be checked with monitoring function.
information
(Code 31623: EPC solenoid current)
Defective hydraulic fan
1 EPC solenoid (Internal dis-
connection)
Disconnection of wiring har-
ness
2
(Disconnection or defective
Possible causes
contact with connector)
and standard
value in normal
state
Short-circuiting of wiring
3 harness
(Contact with 24 V circuit)
4 Pump controller defective
46
Fan Pump EPC Sol. Disc.
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (35) –
V13 (female) (1)
Wiring harness between V13 (female) (2) –
CP03 (female) (3), (13), (23)
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
Between wiring harness between CP03
(female) (35) – V13 (female) (1) and grounding
Between wiring harness between V13 (female)
(2) – V13 (female) (3), (13), (23) and grounding
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between (35) – (3) (13) (23)
V13 (male)
Between (1) – (2)
CP03 (female)
40 Troubleshooting
Resistance
7 – 14 z
Resistance Max. 1 z
Resistance Max. 1 z
Voltage Max. 1 V
Voltage Max. 1 V
Resistance
7 – 14 z
PC800, 850-8