Classification And Procedures For Troubleshooting - Komatsu PC88MR-10 Shop Manual

40 Troubleshooting
Related information on troubleshooting

Classification and procedures for troubleshooting

Classification of troubleshooting
Mode
Display of
Troubleshooting by failure code
code
Troubleshooting electrical system
E-mode
Troubleshooting hydraulic and mechanical system
H-mode
Troubleshooting engine
S-mode
Procedure for troubleshooting
If a problem occurs in the machine, go to the corresponding troubleshooting section according to the following
procedure.
1. Troubleshooting procedure to be taken when action level and failure code are displayed on
machine monitor:
If an action level and a failure code are displayed on the machine monitor, carry out the troubleshooting for
the corresponding [Display of code] according to the displayed failure code.
a If multiple problems occur simultaneously, all the failure codes for the problems are displayed
repeatedly in order. Record all the failure codes.
2. Troubleshooting procedure to be taken when action level and failure code are not displayed on
normal screen of 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 corresponding [Display of code] according to the
recorded code.
a If an electrical system failure code is recorded, delete all the codes once and reproduce them, and
then see if the trouble is still detected. (See [*2])
a A failure code of the mechanical system cannot be deleted.
a If abnormality related to air conditioner is displayed in electrical system abnormality record, perform
"Check with self-diagnosis" in "Air conditioner".
2) If no failure code is recorded in the abnormality record, a failure 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 problem which seems to be a failure again and select the same problem from
the table of "Problem which seems to be failures and troubleshooting Nos.", and then carry out
troubleshooting corresponding to that problem in the [E-mode], [H-mode], or [S-mode].
3. Actions to take after failure is repaired
Referring to following page, delete all failure codes in electrical system abnormality record.
[*1],[*2]
1. On the normal operation screen, while pressing number key [4] in the panel switch section, press [1], [2],
and [3] in this order.
2. On the service menu screen, press switch [F3] (R) in the panel switch section twice, and then select "03
Abnormality Record".
3. Press switch [F6] in the panel switch section to confirm, and then enter the "Abnormality record" screen.
40-36
(PC88MR-5160-40D-A-00-A)
Content
PC88MR-10