Failure Code [B@Hans] Hydr Oil Overheat - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [B@HANS] Hydr Oil Overheat

Action code Failure code
— B@HANS
Contents of • While engine was running, signal circuit of hydraulic oil temperature sensor detected overheating of
trouble hydraulic oil (above about 102°C).
Action of • Displays hydraulic oil temperature monitor with red on machine monitor.
controller • If cause of failure disappears, system resets itself.
Problem that
appears on • If machine is operated as it is, engine may be seized.
machine
• Hydraulic oil temperature sensor signal is input to engine controller and then transmitted to machine
monitor.
Related infor-
• Hydraulic oil temperature can be checked with monitoring function
mation
(Code: 04401 Hydraulic oil temperature)
• Method of reproducing failure code: Start engine.
Possible causes Overheating of hydraulic oil
1
and standard (when system is normal)
value in normal
Defective hydraulic oil tem-
state
2
perature gauge system
Circuit diagram related to hydraulic oil temperature sensor of machine monitor
18
Hydraulic oil overheat
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
Hydraulic oil may be overheating. Check it and remove cause if it is
overheating.
If cause 1 is not detected, hydraulic oil temperature gauge system
may be defective. Carry out troubleshooting for "E-12 Hydraulic oil
temperature gauge does not work normally" in E-mode.
40 Troubleshooting
1
PC300, 350-8