Control and operation

Access and equipment of the cab

As long as the fan symbol 22 is flashing, the fan speed can be increased or reduced manually using the keys 2 or 3

Press the key 5 again, to return to automatic operation. the symbols 22 and 21 will go off, the symbol 20 is displayed again.

Air conditioning operation

Fig. 3-49 Air conditioning operation and Reheat-operation

Press the key 1 turn on the air conditioning operation. the symbol 15 is displayed. the control unit now turns the airco compressor on and off automatically. the control unit automatically adjusts the fan RPM.

Press the key 1 again, to turn off the air conditioning operation. the symbol 15 is no longer displayed, the airco compressor remains off.

Note!

In case of high outside temperature, and especially if the cab has been heated up by the sun, decrease the temperature inside the cab as far as possible before turning on the air conditioner.

Open the windows and the door for a few minutes and adjust the blower fan to maximum RPM via the keys 5 and 2.

Reheat-operation

In order to achieve a quick dehumification of the cab, as an example on morning, when setting the machine into operation, it may be advisable to briefly turn on the air conditioning operation even when the heater is allready operative.

Press the REHEAT-key 6: the symbol 14 is displayed, the compressor is constantly working, the fan of the heater and airconditioner is running at maximum RPM, the air flaps at the front window and at the legroom are open, as necessary the control unit switches on the heating so to maintain the adjusted cab temperature.

As soon as the windows are completely demisted, the Reheat-operation may be exited while pressing the REHEAT-key 6 again

Note!

To avoid overloading the starter motor and the batteries, turn on the air conditioning operation and the REHEAT-operation only after the engine is running.

The REHEAT-operation is turned off automatically after 60 minutes.

If the machine is used for a longer period of time without using the air conditioner, press the REHEAT key 6 about every 2 weeks so to turn on the airco compressor.

Recirculated air and fresh air operation

Fig. 3-50 Recirculated air and fresh air operation

The heating and air conditioning system can work either in recirculated air operation or in fresh air operation.

Pressing the key switch 8 will alternately change from recirculated air operation into fresh air operation: in recirculated air operation: 13 is displayed, in fresh air operation: 13 is no longer displayed, ll is open and an amount of fresh air is admitted into the cab (about 10%, depending on the contamination of the filters 31 and 32).

Note!

The best heating, resp. cooling effect is reached in recirculated air operation!

Air repartition

The adjustment of the air flow in the cab is achieved via the keys 9 to 12 and via the partly closing and revolving louvers 8a to 8d:

8a on the seat console

8b on the right control panel

8c on the front windshield

8d on the rear wall of the cab

To reach a maximal feeling of comfort:

For heating the air flow must be blown into the cab via the louvers 8a, 8b and eventualy 8c. This is obtained while actuating the keys 10, 11 and eventualy 12

For air conditioner operation the air flow must be blown into the cab via the louvers 8d and eventualy 8b. This is obtained while actuating the keys 9 and eventualy 12

Note!

To defrost or dehumidify the windshield quickly, blow the whole air flow only out of the louvers 8c at the front windshield and 8b on the right control panel.

In case of very high outside temperature, preferably close the louvers 8c to avoid an unnecessary warming up of the inside air along the windshield.

Changing the temperature from °Celsius to °Fahrenheit

Fig. 3-52 Switching over °Celsius - °Fahrenheit

Press the key 8 and keep it depressed. Press the key 3 at the same time. the display of the adjustet cab temperature is changed from °Celsius into °Fahrenheit.

Pressing again the keys 8 and 3 at the same time will cause the temperature to change back into °Celsius.

3.3Setting the machine into operation

3.3.1Checking operations before starting the machine

The checking operations to be carried out:

The detailed operations are given in the following table. Do all the necessary checks before starting the machine.

Checking the main electrical components for insulation resistance

Danger! Electrocution hazard!

Death.

Only a qualified electrician is authorized to work on electrical components. Obey the safety instructions for the maintenance of electric excavators. See chapter 2.

Ensure that the main power supply of the machine is switched off and locked and tagged.

Measure the insulation resistance between the phases and earth, and between phases of the following components:

-resistance between windings

-resistance between windings and stator frame the machine: input terminals of the main switch in the cabinet of the machine. ered with the machine: input terminals of the cut-off switch or the circuit breaker in the safety electrical box.

Make sure that the measured values are higher than the values indicated in the operating manual of the electric engine: The minimum insulation resistance value is 1000 per 1V of operating voltage. For example: for a 6,6 kV engine for a 500V engine

If the minimum permitted value is not reached: Use the installed auxiliary standstill heater to preheat the relevant components until the value of 1000 /V is reached.

If the machine cannot be connected to the mains power supply, for example because of insufficient insulation resistance of the electric rotary connection:

Power the auxiliary standstill heaters with a separate 220V or 380V power source. Follow all necessary safety precautions while doing so.

Checking the direction of rotation of the electric engine

Briefly start then shut down the electric engine.

Fig. 3-53 Direction of rotation of the electric engine

Make sure that the direction of rotation of the engine is correct: compare the direction of rotation with the red arrow 1 located on the intermediate piece 2: If the motor is powered through U1, V1, W1 or 1U, 1V, 1W from a direct source L1, L2, L3, it rotates clockwise when looking at the shaft end.

If the direction of rotation is not correct:

Reverse the direction of rotation of the engine.

To reverse the direction of rotation:

Make sure that the engine is designed to operate in the two directions of rotation. Switch the power supply of the two phases.

Checking the earthing terminal and the earthing

Danger!

Electrocution hazard!

Death.

Make sure that the earthing of the electric engine is done according to all applicable safety regulations.

The earthing terminal is located: or

The earthing terminal is identified with the following symbol:

Other checking operations

Before starting the machine: Remove the padlocks attached to the switch cabinet door for the transport of the machine.

Check the emergency off-switch for function. Immediately after starting the electric engine: Check the bearings of the engine for unusual vibrations.

Make sure that the ball bearings of the electric engine are correctly lubricated.

If necessary, lubricate the ball bearings according to the instructions of the manufacturer.

After commissioning and after the first 50 operating hours:

Check the mounting bolts of the engine and of the coupling for correct tightness. See chapter 5: «Checking mounting bolts for tightness».

Daily checking operations

Danger!

Fire hazard!

Damages, burns, death.

Unlock all locks on the doors and panels of the machine. Location of the locks: see chapter 5.

In case of fire, immediately open all doors and panels and extinguish the fire.

Caution!

Hot fluid under pressure! Burns.

Follow the detailed instructions corresponding to the following procedures. See chapter 5 for detailed instructions.

Check the oil level in the hydraulic tank.

If necessary, remove any ice and snow from the engine hood and from the from the grate above the hydraulic oil cooler, in particular from the cooling air aspiration mouth of the electric engine.

Make sure that all doors and covers are correctly closed, but not locked. Make sure that the doors of the electrical cabinets are closed.

3.3.2Switching on the main supply circuit

2 Buttons

The main supply circuit is automatically switched off when the main cabinet doors are opened or when the emergency switch is engaged.

Ensure that the doors of the main cabinet are closed.

Turn the ignition key to contact position 1

Press the button I of the main supply circuit. The indicator light in the button lights. The main supply circuit is switched on. The keyboard and the monitoring display complete a self-test. Check all indicators and instruments for proper functioning. All indicator lights must be briefly on, except the LED of the switch S22 The LIEBHERR logo is displayed.

After the self-test is completed, the next service task deadline is displayed for 10 seconds.

Check the next service task deadline. See chapter 3 "Main screen".

Note!

If no self-test of the keyboard and the monitoring display is performed: Check that the immobiliser has been deactivated. See chapter 3 "Immobiliser (option)".

3 Buttons

Fig. 3-55 Buttons in right armrest

Switching on the electrical system

The main supply circuit is automatically switched off when the main cabinet doors are opened or when the emergency switch is engaged. Ensure that the doors of the main cabinet are closed.

Turn the ignition key to contact position 1

Press the button S207

The indicator light in the button S207 lights. The main supply circuit is switched on.