Failure Code [Daf8Kb] Short Circuit In Camera Power Supply - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [DAF8KB] Short circuit in camera power supply

Serial number 310001 and up
User code Failure code
— DAF8KB
Contents of • Output power supply voltage (Rating: 8 V) from machine monitor to camera is below 6.0 V or above
trouble 10 V.
Action of • Turns output power supply voltage (Rating: 8 V) to camera OFF.
machine monitor • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Camera image is not displayed on monitor screen.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective camera (Internal
1
short circuit)
Ground fault in wiring har-
Possible causes 2 ness (Contact with GND cir-
and standard cuit)
value in normal
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective machine monitor
70
Short circuit in camera power supply
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a Disconnect camera with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
Disconnect camera and perform failure reproduction operation. If
failure code disappears at this time, camera is defective.
a Disconnect camera with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
(Disconnect camera and check that it is not defective in
advance.)
Between CM05 (female) (1) – CAMERA
(female) (F) wiring harness and ground
a Disconnect camera with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
(Disconnect camera and check that it is not defective in
advance.)
Between CM05 (female) (1) – CAMERA
(female) (F) wiring harness and ground
If causes 1 – 3 are not detected, machine monitor may be detective.
(Since trouble is in system, troubleshooting cannot be carried out.)
40 Troubleshooting
1
Voltage Min. 6 V
Voltage Max. 10 V
PC300, 350-8