5 minute read
4Malfunctions
Warning messages and fault messages: the form of indicator lights or symbols if you contact LIEBHERR customer service. Precise information makes it possible to find and rectify the cause of the fault quickly. Additionally, therefore, precise information on the type and serial number of the machine is also required.
Identifying and rectifying faults and errors: machine.
For each fault, therefore, read the relevant chapter in the operating instructions carefully once more.
If the cause of the fault cannot be recognised or rectified using the error codes and fault charts, please consult LIEBHERR customer service.
4.1Faults and remedies
Danger!
When you use the emergency and safety modes of operation, you can no longer operate and monitor the pumps and fans controls, the swing and travel brakes with the standard devices (display, control keyboard) (in case of electronic failure).
4.1.1Hydraulic system
Fault / errorCauseSolution
Unusual noise / sound development at hydraulic pumps
Note!
Switch off electric motor immediately
Shutoff valve on hydraulic tank closed Open stop cock
Hydraulic pumps taking in airCheck oil level in hydraulic tank, check intake lines for leaks
Hydraulic oil temperature too highRadiator cores dirtyClean radiator cores
Fan or fan control defectiveRectify error / consult customer service
Hydraulic oil level too lowOil lossRepair leaks, exchange hoses, refill oil via return-line filter
Cannot drivePush the safety lever upPush the safety lever down No direction of travel preselectedUse drive selection switch in right joystick to determine direction of travel
Parking brake not releasedRelease parking brake using switch
Parking brake will not release despite switch being operated
Servo pressure present: Operate emergency function Y6
Servo pressure not present: Consult customer service
Service brake engagedRelease service brake
Slewing gear not functioningNo servo controlPush the safety lever down
Switch on servo control
Slewing gear brake activatedPush the safety lever down Release slewing gear brake
No working movementNo servo controlPush the safety lever down
Switch on servo control
No servo pressure presentConsult customer service
No pump high pressure presentConsult customer service
4.1.2Transmission
Fault / errorCauseSolution
Oil flowing out on track rollers, support rollers or leading wheel
The idler does not guide the track chain correctly
Seal defectiveReplace seal
There is too much play in the assembly of the idler in the side frame
Crawler jumps off or overCrawler tension too low / crawler wheel worn
Correctly tensioned crawler losing tension quickly during use
Crawler tensioning cylinder defective
Check the assembly of the idler to find and correct the cause of the problem
Adjust crawler tension
Check crawler tensioning cylinder, change if required or seal (only authorized specialist personnel)
Track roller or support roller stickingRunning gear extremely dirtyClean running gear
4.1.3Electrical system
Fault / errorCauseSolution
Batteries do not charge or charge poorly
Warning light or display instrument not functioning or functioning incorrectly
Some or all functions on instrument panel drop out
Servo control cannot be activated using switch
Parking brake cannot be released using switch
Slewing gear brake cannot be released using switch
Batteries defectiveReplace batteries
Battery connections dirty / oxidisedClean battery connections
Cable loose or damagedConnect or replace cable
Bulb burnt out, display instrument defective
Plug connector separated or damaged, earth lead interrupted, short circuit fuse defective
Replace defective part
Mount plug connector correctly or change, rectify short circuit, replace fuse or activate overload cut-outs
Excavator electrics defectiveSwitch on emergency function using switch S73 on the electric plate A1002.
Caution: Servo circuit and brake circuit can only be switched off using the safety lever. Keypad not functioning. Consult customer service.
4.1.4Work equipment
Fault / errorCauseSolution
Cylinder stretches when loadedPiston seal in cylinder defectiveOverhaul cylinder
Bearing clearance too high on equipment
Bearing points worn outReplace bearing parts
Grab / bucket does not moveValve block on tilting cylinder incorrectly switched
Switch over valve block
4.1.5Heating/air-conditioning system
Fault / errorCauseSolution
Heating fan does not operateNo power supplyCheck fuse and wiring / repair Fan motor defectiveChange fan motor
Only low air flow in cabOutside air filter / recirculated air filter dirty Clean air intake opening, replace outside air filter Air vent closedOpen air vent
In addition, the upcoming of error codes in the display area of the heater/air-conditioning operation unit helps the troubleshooting in the heater and air-conditioning (airco) circuit.
These error codes inform on the possible troubles on given components in the operation and control circuits of the heater airco/plant. They are listed below:
Error code “F0“ defective room temperature gauge:
The control unit has recognised a defective room temperature gauge, the regulation is no longer ready for operation.
Cause of gauge error: short-circuit or interruption of gauge power supply line, defective plug connection on gauge or on control unit, or temperature gauge defective.
The heater / airco regulator is then only ready for operation again when the fault of the gauge has been remedied, the gauge error will then no longer be displayed! Should a gauge error occur, the regulator continues to operate to the setting which was valid before the fault was recognised.
Error code “F1“ defective blow-out temperature gauge:
The control unit has recognised a defective blow-out temperature gauge, the regulation is no longer ready for operation.
Cause of gauge error: short-circuit or interruption of gauge power supply line, defective plug connection on gauge or on control unit, or temperature gauge defective.
The heater / airco regulator is then only ready for operation again when the fault of the gauge has been remedied, the gauge error will then no longer be displayed! Should a gauge error occur, the regulator continues to operate to the setting which was valid before the fault was recognised.
Error code “F2“ defective reserve temperature gauge:
The control unit has recognised a defective reserve temperature gauge, the regulation is no longer ready for operation.
Cause of gauge error: short-circuit or interruption of gauge power supply line, defective plug connection on gauge or on control unit, or temperature gauge defective.
The heater / airco regulator is then only ready for operation again when the fault of the gauge has been remedied, the gauge error will then no longer be displayed! Should a gauge error occur, the regulator continues to operate to the setting which was valid before the fault was recognised.
Error code “F3“ defective vent flap foot room area and front window:
The control unit has recognised a defective vent flap in the air duct to the front window and foot area, the regulation is once again ready for operation.
Cause of flap fault: short-circuit or interruption of the power supply line, defective plug connection on flap motor or on control unit, or flap motor defective.
After remedying of the fault, the fault is no longer displayed.
Should a flap error occur, the regulator carries on working as usual, only the middle position of the vent flap can no longer be started.
Error code “F4“ pressure fault and defective magnetic coupling: The control unit has recognised a defective vent flap room area and front window, the regulation is once again ready for operation.
Cause of flap fault: short-circuit or interruption of the power supply line, plug connection on fan flap motor or control unit, flap motor defective.
After remedying of the fault, the fault is no longer displayed!
Should a pressure fault or defective magnetic coupling occur, the regulator carries on working as usual, only the magnetic coupling output is interrupted.
Error code “F5“ defective data transmission operating feature / control unit:
Data transmission from the operating feature to the control unit is defective.
Cause of the fault: short-circuit or interruption of the data line to control unit, plug connection on operating feature or control unit.
The operating feature continues to try to establish data connection to the control unit, if the connection is once again OK, nger be displayed. If the data transmission from the operating feature can not be established again, the ignition must be switched off, and RESET will be carried out following the restart.
4.2Fuses and relays
Danger!
Incorrect or bypassed fuses do not let have the necessary degree of protection of the machine's operator or the electrical system.
Only use original fuses.
Never bypass electrical fuses.
If required, order replacement fuses from Liebherr.
