Malfunctions
Operating manual
Troubleshooting
Error / fault
Cause
Remedy
Modes E and P show poor performance
No performance adjustment by means of proportional solenoid valve
Operate machine in emergency mode
Hydraulic oil temperature too high
Radiator dirty
Cleaning radiator
Fan or fan control defective
Eliminate fault / contact LIEBHERR customer service
Hydraulic oil level too low
Oil loss
Repair leak, replace hoses, add oil through the return filter
Travel function not available
Safety lever moved up
Move safety lever down
Slewing gear failure
Servo control not working
Move safety lever down Switch on servo control
Slewing gear brake activated
Move safety lever down Release slewing gear brake
No working movement
Servo control not working
Move safety lever down Switch on servo control
4.3.3
No servo pressure
Contact LIEBHERR customer service
No pump high pressure
Contact LIEBHERR customer service
Travelling
Error / fault
Cause
Remedy
Machine fails to travel forward or back
Safety lever moved up
Move safety lever down
Machine moves too slowly
Travel pedals dirty Super-Finish activated with switch S354 (if installed). Emergency control activated
Clean travel pedals Deactivate Super-Finish (if installed); switch off emergency control and switch machine to standard operating mode; contact LIEBHERR customer service
Oil escaping at running rollers, support rollers or idler
Seal defective
Replace seal
Poor chain alignment at idler
Excessive play of idler guide system at the running roller frame
Adjust pay of idler guide system
Chain jumps from guides
Insufficient chain tension / chain wheel worn
Adjust chain tension
Correctly tightened chain becomes loose after short operation
Chain tensioning cylinder defective
Check chain tensioning cylinder; replace or reseal, if necessary (to be done by authorised specialist technician)
Running or support roller stiff
Drive extremely dirty
Cleaning drive
4.3.4
Electrical system
Error / fault
Cause
Remedy
Battery charging indicator light does not go off
V-belt of alternator loose or broken
Tighten or replace V-belt
Alternator defective
Replace alternator
Batteries not sufficiently charged
Batteries defective
Replace batteries
Battery connections dirty / oxidised
Clean battery connections
Cable loose or defective
Connect or replace cable
Failure of indicator light or indicating instrument
Incandescent lamp burnt out; indicating instrument defective
Replace defective part
Failure of one or more instrument panel functions
Adapters disconnected or defective; earth connector disconnected; short circuit - fuse blown
Plug in or change adapter; eliminate cause of short circuit; replace fuse or reset automatic cut-out
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4-8
R 984 C Litronic High Rise / 11140259
