Komatsu Galeo PC800-8 User Manual

6 PC800, 850-8
SEN00790-02 40 Troubleshooting
Failure code [AB00KE] Charge Voltage Low
Action code Failure code
Trouble
Charge Voltage Low
(Machine monitor system)
— AB00KE
Contents of
trouble
• Signal voltage from alternator is below 20 V while the engine is running.
Action of
controller
• None in particular.
Problem that
appears on
machine
• If machine is operated as it is, battery may not be charged.
Related
information
• If a charge level monitor on the machine monitor lights up in red while the engine is running, this failure
code will be recorded.
• Input from alternator (voltage, ON or OFF) can be checked with monitoring function.
(Code 04300: Charge voltage, 04501: Monitor input 2)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective alternator
(Low power generation)
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
Alternator Engine Voltage
Between R terminal –
chassis ground
Above low idle 27.5 – 29.5 V
If the voltage is abnormal, check the belt tension too.
2
Disconnection in wiring har-
ness
(Disconnection in wiring or
defective contact in connec-
tor)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM02 (female) (11) –
J02 (13) (12) – Alternator R terminal
Resis-
tance
Max. 1 z
3
Ground fault in wiring har-
ness
(Short circuit with GND 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) (11) – J02 (13), (12) – alternator R ter-
minal and chassis ground
Resis-
tance
Min. 1 Mz
Between wiring harness between J02 (female)
(11) – D01 (6), (2) – J01 (4), (2) – starting
switch BR terminal and chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between battery relay BR termi-
nal – J01 (female) (3) and chassis ground
Resis-
tance
Min. 1 Mz
4 Defective machine monitor
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
CM02 Engine Voltage
Between (11) –
chassis ground
Above low idle 27.5 – 29.5 V

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English