FAU LT S , C AU S E A N D R E M E DY
Page 53
FAU LT S , C AU S E A N D R E M E DY
FAU LT TA B L E
Fault
Possible cause
Remedy
Lifting not possible
Air pressure too low
Increase air pressure to the relevant value
EMERGENCY STOP switch
When the danger has passed,
is pressed
release the EMERGENCY STOP switch
Hand control is faulty
Have hand control repaired
Only very slow lifting
Brake does not bleed fully
Set air pressure to the relevant value,
is possible
Check seal of brake piston and change seal
if necessary. Check the adjustment of the
brake piston (see
E-list
)
Brake lining worn
Replace brake lining
Motor cover bolts loose
Tighten bolts
Air supply hoses are
Check connections of air supply hose and
leaking or loose
control hoses and connect properly
Cross section of air line
Use air line with sufficiently large
too small
diameter (check air pressure)
Dirt in the service unit*
Clean the service unit,
Filter blocked
ensure better air quality
Silencer is
Replace the silencer elements
clogged
or clean, improve air quality if necessary
Motor vanes worn
Replace motor vanes
Motor has run dry
Lubricate motor,
Check oiler*
Control valve on motor
Have the control valve repaired
Excessive running on during braking
Brake disc and/or
Replace brake disc and/or
brake piston worn
brake piston
Loud chain noise
Chain dry
Lubricate chain
at chain sprocket
Chain worn
Replace JDN chain with new JDN chain
Chain sprocket worn
Replace chain sprocket, check chain guide,
replace if necessary
Wrong chain drawn in
Identify chain and replace with
JDN chain if necessary
Lifting or lowering speed
Adjustment of
Correct adjustment of the brake piston
falls at higher lifting heights
the brake piston too tight
or motor stops
*if installed
