Komatsu Galeo PC800-8, Руководство по ремонту

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PC800, 850-8
SEN00789-02 40 Troubleshooting
Information in troubleshooting table
a
The following information is summarized in the troubleshooting table and the related electrical circuit dia-
gram. Before carrying out troubleshooting, understand that information fully.
Action code Failure code
Trouble Title of failure phenomenon shown in failure history
Display on
machine
monitor
Display on
machine
monitor
Contents of
trouble
Contents of trouble detected by machine monitor or controller
Action of
machine monitor
or controller
Action taken by machine monitor or controller to protect system or devices when engine control-
ler detects trouble
Problem that
appears on
machine
Problem that appears on machine as result of action taken by machine monitor or controller
(shown above)
Related
information
Information related to detected trouble or troubleshooting
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Possible causes of trouble
(Given numbers are refer-
ence numbers, which do
not indicate priority)
<Contents of description>
• Standard value in normal state to judge possible causes
• Remarks on judgment
<Troubles in wiring harness>
• Disconnection
Connector is connected imperfectly or wiring harness is broken.
• Ground fault
Wiring harness which is not connected to chassis ground circuit is in
contact with chassis ground circuit.
• Hot short
Wiring harness which is not connected to power source (24 V) circuit
is in contact with power source (24 V) circuit.
<Precautions for troubleshooting>
(1) Method of indicating connector No. and handling of T-adapter
Insert or connect T-adapter as explained below for troubleshooting,
unless otherwise specified.
• If connector No. has no marks of “male” and “female”, disconnect
connector and insert T-adapters in both male side and female side.
• If connector No. has marks of “male” and “female”, disconnect con-
nector and connect T-adapter to only male side or female side.
(2) Entry order of pin Nos. and handling of tester leads
Connect positive (+) lead and negative (–) lead of tester as explained
below for troubleshooting, unless otherwise specified.
• Connect positive (+) lead to pin No. or wiring harness entered on front
side.
• Connect negative (–) lead to pin No. or harness entered on rear side.
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