Classification And Troubleshooting Steps - Komatsu ecot3 PC300LC-8 Shop Manual

40 Troubleshooting

Classification and troubleshooting steps

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
Troubleshooting steps
If a problem that appears to be a failure occurs on the machine, identify the relevant troubleshooting No. by
performing the following steps and proceed to the main body of troubleshooting.
1. Procedure for troubleshooting to be taken when action code is displayed on machine monitor:
When action code is displayed on machine monitor, press [ ] switch at panel switch section to display
failure code.
Carry out the troubleshooting for the corresponding [Display of code] according to the displayed failure
code.
2. Procedure for troubleshooting to be taken when failure code is recorded in abnormality record:
If an action code is not displayed on the machine monitor, check a failure code with the abnormality record
function of the machine monitor.
If a code is recorded, carry out troubleshooting for the corresponding [Display of code] according to the
recorded code.
a If an electrical system failure code is recorded, delete all the codes and reproduce them, and then see
if the trouble is still detected.
a An error code of the mechanical system cannot be deleted.
3. Procedure for troubleshooting to be taken when action code is not displayed and no failure code
is recorded in abnormality record:
If an action code is not displayed on the machine monitor and no failure code is recorded 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 looking like a trouble again and select the same phenomenon from
the table of ÅgPhenomena looking like troubles and troubleshooting Nos.Åh, and then carry out trouble-
shooting corresponding to that phenomenon in the "E-mode", "H-mode", or "S-mode".
PC300, 350-8
Contents
SEN02628-04
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