Malfunctions

Troubleshooting

Error / faultCauseRemedy

Modes E and P show poor performanceNo performance adjustment by means of proportional solenoid valve

Operate machine in emergency mode

Hydraulic oil temperature too high Radiator dirtyCleaning radiator

Fan or fan control defectiveEliminate fault / contact LIEBHERR customer service

Hydraulic oil level too lowOil lossRepair leak, replace hoses, add oil through the return filter

Travel function not availableSafety lever moved upMove safety lever down

Slewing gear failureServo control not workingMove safety lever down

Switch on servo control

Slewing gear brake activatedMove safety lever down

Release slewing gear brake

No working movementServo control not workingMove safety lever down

Switch on servo control

No servo pressureContact LIEBHERR customer service No pump high pressureContact LIEBHERR customer service

4.3.3Travelling

Error / faultCauseRemedy

Machine fails to travel forward or backSafety lever moved upMove safety lever down Machine moves too slowlyTravel pedals dirty Super-Finish activated with switch S354 (if installed). Emergency control activated

Oil escaping at running rollers, support rollers or idler

Clean travel pedals Deactivate Super-Finish (if installed); switch off emergency control and switch machine to standard operating mode; contact LIEBHERR customer service

Seal defectiveReplace seal

Poor chain alignment at idlerExcessive play of idler guide system at the running roller frame

Adjust pay of idler guide system

Chain jumps from guidesInsufficient chain tension / chain wheel worn Adjust chain tension

Correctly tightened chain becomes loose after short operation Chain tensioning cylinder defectiveCheck chain tensioning cylinder; replace or reseal, if necessary (to be done by authorised specialist technician)

Running or support roller stiffDrive extremely dirtyCleaning drive

4.3.4Electrical system

Error / faultCauseRemedy

Battery charging indicator light does not go off V-belt of alternator loose or brokenTighten or replace V-belt Alternator defectiveReplace alternator

Batteries not sufficiently chargedBatteries defectiveReplace batteries

Battery connections dirty / oxidisedClean battery connections

Cable loose or defective

Failure of indicator light or indicating instrument Incandescent lamp burnt out; indicating instrument defective

Failure of one or more instrument panel functions

Adapters disconnected or defective; earth connector disconnected; short circuit - fuse blown

Connect or replace cable

Replace defective part

Plug in or change adapter; eliminate cause of short circuit; replace fuse or reset automatic cut-out copyright by

Error / faultCauseRemedy

Speed cannot be adjusted through keyboard (mode and arrow keys)

Idle automatic is activatedGrab the joystick or deactivate the idle automatic

Excavator electronics for speed adjustment not working

No signal from speed sensor

Switch hydraulic pump to emergency mode, contact LIEBHERR customer service

Idle automatic without function; speed fails to drop Permanent sensor signalContact LIEBHERR customer service

Idle automatic is deactivatedActivate idle automatic

Slewing gear brake cannot be released with switch Fault in electrical system of excavatorActuate emergency mode control Caution: The keyboard is disabled; contact LIEBHERR customer service

4.3.5Heating and air conditioning system

Error / faultCauseRemedy

No warm air escaping from heating systemShut-off valves (if installed) of coolant line on the diesel engine closed

Open shut-off valve

Diesel engine too coldWarm up diesel engine to its normal operating temperature

Heating blower not workingNo powerCheck fuse and cable; replace or repair if required

Blower motor defectiveReplace blower motor

Low air circulation rate in operator's cabAmbient air filter / recirculation air filter contaminated

Clean air intake openings; replace ambient air filter

Air outlets closedOpen air outlets

4.3.6Working attachment

Error / faultCauseRemedy

Cylinder responds to loadPiston seal on cylinder defectiveService hydraulic cylinder Excessive bearing play in attachmentBearing points wornReplace bearing components

Grapple / bucket cannot be movedValve block at tilt cylinder connected incorrectly

Change connections to valve block

Attachment cannot be rotated, swivelled or operated Additional function not activatedRelease additional function Lines not connectedConnect lines

4.4Fuses and relays

Danger!

Incorrect or bridged fuses do not provide the protection required for the safety of the machine operator and the electrical equipment.

Use only original fuses.

Never bridge electrical fuses.

If necessary, order replacement fuses from LIEBHERR.

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