Komatsu PC58UU-3, Руководство по ремонту

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STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ELECTRICAL SYSTEM
PC58UU-3
10-121
12
4. Cancel function
• If the emergency stop function is turned on,
or if the controller or any of the potentiome-
ters fails, the controller will stop action of the
work equipment, swing, and travel by cutting
off signal current to the solenoid and EPC
valves.
• This situation requires your immediate check-
ups. In case the machine must be moved to a
safe place before starting the checkups, use
the emergency work equipment operation
switch (S) situated under the operator seat.
Turning this switch on allows you to move the
work equipment to any desired location.
(1) Normal position
(2) In emergency
• As soon as the emergency work equipment
operation switch (S) is turned on, "In emer-
gency (2)", the alarm buzzer will start sound-
ing and the electronic system caution lamp
will also start flashing to notify the operator
that the cancel function has been turned on.
★
If any failure is present in the electric system
of the solenoid or EPC valves, this cancel
function is not available.
When the error code "Failure in Solenoid Sys-
tem" is displayed on the monitor panel depth
indicator, you must not turn the emergency
work equipment switch (S) to the "In emer-
gency (2)" position.
★
When turning the emergency work equip-
ment operation switch (S) to the "emergency
(2)" position, be careful to operate the work
equipment because the interference preven-
tion function of the controller does not work.
★
The emergency work equipment operation
switch (S) is an auto-return type. Namely, if
you move your hand off the switch in the "In
emergency (2)" position, it will automatically
return to the "Normal (1)" position.
Stop cancel oper-
ation Boom, Arm, Bucket
Swing, Offset, Travel
Alarm buzzer Sounded for 7 seconds
Electronic system
caution lamp Delayed flashing intervals
(once every 0.8 seconds)