FAU LT TA B L E
powered by air !
FAU LT S , C AU S E A N D R E M E DY
Page 61
FAU LT S , C AU S E A N D R E M E DY
*if installed
Fault
Possible cause
Remedy
Lifting not possible
Only very slow lifting possible
Excessive running on during braking
Loud chain noise
on the chain sprocket
Lifting or lowering speed declines
with high lifting heights or the
motor comes to a standstill
Increase air pressure to the required value
Release the EMERGENCY-OFF switch
if the danger has been rectified
Have hand control repaired
Set air pressure to the relevant value, check
seal of brake piston and change seal if
necessary Check the adjustment of the brake
piston (see
Spare Part List
)
Replace brake lining
Tighten the bolts
Check connections of air supply hose and
control hoses and connect properly
Use air line with sufficiently large cross
section (check air pressure)
Clean service unit, ensure better air quality
Replace or clean silencer elements, improve air
quality if necessary
Replace motor vanes
Lubricate motor,
check oiler*
Have control valve repaired
Adjusting safety clutch
Replace chain with a new JDN Chain
Replace brake disc and/ or brake piston
Lubricate chain
Replace chain with a new JDN Chain
Replace chain sprocket, check chain guide,
replace if necessary
Identify chain and replace with JDN Chain if
necessary
Correct adjustment of brake piston. At
high ambient temperatures, perform
adjustment with
the device warmed up accordingly.
Air pressure too low
EMERGENCY STOP button is
pressed
Hand control is faulty
Brake does not release fully
Brake lining worn or uneven
Motor cover bolts loose
Air supply hoses leaking or
loose
Cross section of air line too
small
Dirt in the service
unit*, filter blocked
Silencer is clogged
Motor vanes worn
Motor has run dry
Control valve on motor
Safety clutch slips
Safety clutch slips due to chain
wear
Brake disc and/or brake piston
worn
Chain dry
Chain worn
Chain sprocket worn
Wrong chain drawn in
Brake piston setting too tight
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