Control and operation

When a service connector is pluged in:

The submenu list S-Exxx lists all the operating faults, just like the submenu list Exxx, but this time only faults appeared in service mode, i. e. when a service connector was connected.

The sub-menu allows to separate the faults occuring during maintenance works,in particular during the troubleshootings. For each error, an overview is shown and can be paged in just like for the "list Exxx" selection.

When exiting the service mode, the memory "list S-Exxx" is reset, the service mode operating faults are not stored.

Menu "set clock" - Time setting

Via this menu the clock displayed in the upper right corner of the main screen can be set.

Fig. 3-27 Setting of the clock

After function start, the presently set time will appear in the lower section of the screen with the digit completely right inversely displayed (unity digit of the minutes).

Press the UP or DOWN key to adjust the selected digit.

Press the MENU key: the immediately more left digit is now inversely displayed. Repeat the procedure until all the digits have been set.

Press the Enter key:

3-28 Confirmation of the storage of the new time

The confirmation message ear momentarily on the screen and the new time is stored. The menu "set clock" is closed and the main menu is displayed on the screen.

3.1.7Preparation for external control (option)

Connecting external systems

With the preparation for external control, external systems can be connected and controlled. The electrical connection was the responsibility of the customer. Liebherr exclusively supplies the preparatory components. Observe the following instructions for electrical connection: Observe safety instructions for electric excavators. See chapter 2.

Maximum permitted voltage for use of the collector: 24VDC. Make connected functions visible to the operator on the keys (labels) or on the side window (sticker).

Working with the external systems

Danger! Incorrect use of control! Death, injuries, damage. Before work, check controls for functionality. Make sure that nobody is in the working area of the machine and the connected external systems.

For more information, refer to the operating instructions of the connected external systems.

3.1.8Controls and instrumentation for optional equipments

Controls for optional equipments

The location of these controls may be different, depending on the type of the other installed optional equipments.

On machines fitted with the special equipment "cooler fan reversible", this control light lights up to indicate that the fan has been changed over to rotation in opposite direction via the push button S160, see also the section "Reversible cooler fan (Optional equipment)" in the chapter "maintenance".

When actuating this touch a pressure signal is send to the reversing hydraulic hammer, causing the hammer to change over to the second cycle frequency.

For Special Equipment

If an hydraulic actuator ( cylinder, hydraulic motor, ) of a special equipment requires a constant oil flow, the speed of the remaining attachment movements can be reduced by depressing the push button S45 (control light inside the button must light).

The necessary oil flow for the hydraulic actuator is maintained, even in case of simultaneous actuation of other attachment movements.

The push button S47 turns on the control circuit for the quick change adapter for the working tool. See also the section "Hydraulic quick change adapter for working tools (optional equipment)" in this chapter.

Actuating this touch makes alive an additional control circuit for a special equipment. The green indicator light in the touch lights up to show that the additional servo control circuit is under pressure.

On some special working attachments, or on attachment showing particular cinematic capacities (as example on industrial attachment), certain movement(s) may be stopped automatically by electrical end switches. The main purpose of this movement limitation is to prevent possible damages due to components frequently reaching their end stops.

See "Cutoff by end switches of attachment movements (option)" in this chapter.

This touch controls the travel parking brake on the machines fitted with a special undercarriage, or on machines mounted on a loading bridge, a wagon, ...

When the red indicator light in the touch lights up, the travel brake is applied. On machines with a standard undercarriage, the travel brakes are controlled directly via the travel pedals and the touch S76 does not exist.

When the touch is depressed, the green indicator light in the touch lights up and an air fan is started to maintain a slight pressurization inside the driver's cab. The entering of dust or not filtered air into the cab is then almost prevented.

Should a certain user (cylinder, hydraulic motor, ...) has to be fed with a constant oil flow during the actuation of a special attachment, so the necessary oil flow can be reserved to give priority to this user while depressing the touch S79.The indicator light in the touch is then lighting up.

The velocity of the other simultaneously actuated working movements is correspondingly reduced.