Komatsu Galeo PC800-8 User Manual

72 PC800, 850-8
SEN00791-02 40 Troubleshooting
Failure code [DGH2KB] Hydr. Oil Temp. Sensor S/C
Action code Failure code
Trouble
Hydr. Oil Temp. Sensor S/C
(Mechanical system)
— DGH2KB
Contents of
trouble
• The signal of the hydraulic oil temperature sensor rises above 102°C while the engine is running.
Action of
controller
• None in particular.
Problem that
appears on
machine
• If the machine is used as it is, the hydraulic equipment may be damaged.
Related
information
• If the hydraulic oil temperature monitor on the machine monitor lights up in red while the engine is run-
ning, this failure code is recorded.
• Input from the hydraulic oil temperature sensor can be checked in the monitoring function.
(Code No. 04401: Hydraulic oil temperature, 04402: Hydraulic oil temperature sensor voltage
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Hydraulic oil overheated
(While system is normal)
Check the hydraulic oil for overheating. If it has been overheated, find
out the cause and check the hydraulic equipment for damage, then
repair.
2
Hydraulic oil temperature
sensor defective
(Internal short-circuiting)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
P22 (male)
Hydraulic oil tempera-
ture
Resistance
Between (1) – (2)
10 – 100°C
90 – 3.5 kz
Between (1) – chassis
ground
Min. 1 Mz
3
Grounding fault of wiring
harness
(Contact with grounding cir-
cuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness between CM02
(female) (12) – P22 (female) (1) and chassis
ground
Resis-
tance
Min. 1 Mz
4 Machine monitor defective
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
CM02 (female)
Hydraulic oil tempera-
ture
Resistance
Between (12) – (13)
10 – 100°C
90 – 3.5 kz
Between (12) –
chassis ground
Min. 1 Mz

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English