Information In Troubleshooting Table - Komatsu PC130-7 Shop Manual

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.
User code Error code
Display on panel Display on panel
Contents of
Condition at the time when the monitor panel or controller detects the trouble
trouble
Action of monitor
The action taken by the monitor panel or controller to protect the system or devices when the monitor
panel or
panel or controller detects the trouble
controller
Problem that
The problem that appears on the machine as a result of the action taken by the monitor panel or control-
appears on
ler (shown above)
machine
Related
Information related to the detected trouble or troubleshooting
information
1
2
Possible causes
Possible causes of trouble
and standard
(Given numbers are refer-
value in normal
ence numbers, which do not
state
indicate priority)
3
4
PC130-7
Trouble Trouble indicated by error code
Cause Standard value in normal state/Remarks on troubleshooting
<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 harness is broken.
• Grounding fault
Harness which is not connected to chassis ground circuit is in con-
tact with chassis ground circuit.
• Short circuit with power source
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
connector and connect T-adapter to only male side or female
side.
2) Entry order of pin Nos. and handling of circuit tester leads
Connect positive (+) lead and negative (-) lead of circuit tester as
explained below for troubleshooting, unless otherwise specified.
• Connect positive (+) lead to pin No. or harness entered on front
side.
• Connect negative (-) lead to pin No. or harness entered on rear
INFORMATION IN TROUBLESHOOTING TABLE
20-307
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