TROUBLESHOOTING
PC58UU-3
20-243
1
EXPLANATIONS OF CONTROL MECHANISM OF
ELECTRICAL SYSTEM
PRECAUTIONS FOR TROUBLESHOOTING
The controller has a self-diagnosis function of troubleshooting itself as long as possible.
During troubleshooting, error codes are displayed in the depth display section of the monitor panel and in
the display section of the controller.
At the same time, the controller blinks the caution lamp of the electric system and sounds the alarm buzzer
intermittently to notify the operator for the trouble mode and takes the following actions.
•
Display of troubled systems and actions taken for them
★
Once a trouble other than error code [61] is diagnosed, trouble is kept as it is. If the trouble of error
code [61] is diagnosed and reset, the controller is set in the normal mode and the error code display
goes off.
Even if there is any abnormality in the other than monitored inputs, error code is not displayed. Some
input and output signals are checked with the [monitoring function].
When work equipment solenoid valve systems (
E
,
F
,
G
) are troubled (Error codes:
5!
,
5@
,
4@
)
•
Stops operations of
E
,
F
, and
G
(Work equipment cannot move in interfering directions).
When PPC main pressure lock solenoid valve system (
I
) is troubled (Error code: 41)
•
When error code is 41: Stop operation of
H
(Since PPC main pressure is too low,
machine cannot operate work equipment, travel, or swing at all).
When interference prevention system is troubled (When work equipment enters into interference
area because spool does not close) (Error code: 61)
•
Stops operation of
I
(Since PPC main pressure is too low, machine cannot operate
work equipment, travel, swing, or blade at all).
When resetting switch systems (
J
,
1)
) are troubled (Error codes: 01 - 18)
•
Sets values to zero of indication of potentiometer angle, bucket front and side stop
positions, and depth. Machine can operate normally, however.
When pump control systems (
1!
,
1#
) are troubled (Error codes: 54, 24)
•
Operates machine with
1!
at certain value, or stops the machine.
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