Failure Code [B@Hans] Hydr. Oil Overheat - Komatsu Galeo PC800-8 Shop Manual

SEN00790-02

Failure code [B@HANS] Hydr. Oil Overheat

Action code Failure code
— B@HANS
Contents of
• While engine was running, signal of hydraulic oil temperature sensor input 102°C or higher.
trouble
Action of
• None in particular.
controller
Problem that
appears on • If machine is operated as it is, hydraulic components may be seized.
machine
• If hydraulic oil temperature monitor on the machine monitor lights up in red while the engine is running,
this failure code will be recorded.
Related
• Input from the hydraulic oil temperature sensor (temperature) can be checked with monitoring func-
information
tion.
(Code 04401: Hydraulic oil temperature, 04402: Hydraulic oil temperature sensor voltage)
Hydr. Oil Overheat
1
(when system is normal)
Defective hydraulic oil tem-
2 perature sensor
(Internal short circuit)
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
ness
3
(Short circuit with GND cir-
cuit)
4 Defective machine monitor
14
Hydr. Oil Overheat
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
Check the hydraulic oil for overheating. If it has been overheated, find
out the cause and check the hydraulic equipment for damage, then
repair.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
P22 (male)
Between (1) – (2)
Between (2) –
chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between P02 (female) (12) –
P22 (female) (1) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
P02 (female)
Between (12) – (13)
Between (12) –
chassis ground
40 Troubleshooting
Hydraulic oil
Resistance
temperature
90 – 3.5 kz
10 – 100°C
Min. 1 Mz
Resis-
tance
Hydraulic oil
Resistance
temperature
90 – 3.5 kz
10 – 100°C
Min. 1 Mz
Min. 1 Mz
PC800, 850-8