Failure Code [6091Nx] Hst Filter: Clogging - Komatsu WA250-6 Shop Manual

SEN03841-00

Failure code [6091NX] HST filter: Clogging

Action code Failure code
E01
Contents of
• When HST oil temperature was above 50°C, HST oil filter clogging sensor signal circuit was closed
trouble
(in contact with GND).
Action of • Turns HST clogging caution lamp ON.
machine monitor
• if cause of failure disappears, system resets itself.
Problem that
appears on
• If machine is used as it is, foreign matter may enter HST circuit.
machine
Related The input state from the HST oil filter clogging sensor can be checked with monitoring function
information (Monitoring code: MONITOR PANEL – 40903 – D-IN-24)
1 Clogged HST oil filter
Defective HST oil filter clog-
2
ging sensor (Internal defect)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness (Disconnection in wiring
state
3
or defective contact in con-
nector)
4 Defective machine monitor
Related circuit diagram
4
40-310
Trouble
6091NX
Causes
310 Troubleshooting by failure code (Display of code), Part 1
Failure code [6091NX] HST filter: Clogging
HST filter: Clogging
(Machine monitor system)
Standard value in normal state/Remarks on troubleshooting
System is normal.
a Check HST oil filter directly.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
T13
Not clogged (Normal)
Between T13 –
ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between T13 – L26 (female)
(5)
Wiring harness between HST oil filter clog-
ging sensor body – ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
L26
Not clogged (Normal)
Between (5) – ground
Filter condition Resistance
Clogged
Resis-
tance
Resis-
tance
Filter condition
Clogged
WA250, 250PZ-6
Min. 1 Mz
Max. 1 z
Max. 1 z
Max. 1 z
Voltage
20 – 30 V
Max. 1 V