Classification And Procedures For Troubleshooting - Komatsu PC200-8M0 Shop Manual

SEN06132-01

Classification and procedures for troubleshooting

Classification of troubleshooting
Mode
Display of code Troubleshooting by failure code
E-mode Troubleshooting of electrical system
H-mode Troubleshooting of hydraulic and mechanical system
S-mode Troubleshooting of engine
Procedure for troubleshooting
If a phenomenon which appears to be connected with machine trouble occurs on the machine, select a proper
troubleshooting No. according to the following procedure, and then go to the corresponding troubleshooting
section.
1. Procedure for troubleshooting to be taken when user code and failure code are displayed on
machine monitor:
If a user code and a failure code are displayed on the standard screen of the machine monitor, perform
the troubleshooting for the corresponding "Display of code" according to the displayed failure code.
a If multiple failures occur simultaneously, all the failure codes are displayed repeatedly in order. Note
down all the codes.
2. Procedure for troubleshooting when a user code and a failure code are not displayed on machine
monitor:
Check a mechanical system failure code and an electrical system failure code with the abnormality record
function of the machine monitor. (See [*1].)
1) If a code is recorded, carry out troubleshooting for the "Display of code" corresponding to the recorded
code.
a If an electrical system failure code is recorded, delete all the codes once, follow the procedure to
reproduce the failure code, and then see if the failure is still detected. (See [*2].)
a A failure code of the mechanical system cannot be deleted.
2) If no failure code is found in the abnormality record, a trouble that the machine cannot find out by itself
may have occurred in the electrical system or hydraulic and mechanical system.
In this case, check the phenomenon which appears to be connected with machine trouble again and
select the same phenomenon from the list on the next page, and then perform troubleshooting corre-
sponding to that phenomenon in the "E-mode", "H-mode", or "S-mode" troubleshooting.
3. Action to take after failure is eliminated
Clear all the failure codes in the electrical system abnormality record, referring to the next page.
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200 General Information on troubleshooting
Classification and procedures for troubleshooting
Content
PC200, 200LC, 220, 220LC-8M0