OZ Lifting Products ELECTRIC Serie Manuel De L'opérateur page 10

TROUBLESHOOTING:
SYMPTOM
No reaction or open circuit
Can lift, but fail to lower
Can lower, but fail to lift
Short circuit
Fail to lift the load rated
Fail to hold the load after stopping
Brake distance is too long at no load
Having smell or smoke
Too noisy while lifting
POSSIBLE CAUSE
Open circuit on power lead or switch cord
Burnt rectifier at power source side
Burnt motor
Burnt or communicated motor resulting from overload
Improper installation or wearing of carbon brush
Escape or open circuit of carbon brush lead
Deformation of DOWN spring plate of limit switch
Brunt diode
Burnt limit switch
Burnt rectifier at motor side
Malfunction of the DOWN contact of the pendant switch
Deformation of UP spring plate of limit switch
Burnt limit switch
Loose of the transmitting arm resulting in malfunction of DOWN limit switch
Loose adjustable nut
Burnt diode
Burnt UP limit switch
Burnt rectifier at motor side
Malfunction of the UP contact of the pendant switch
Melted B contact of the pendant switch
Burnt diode
Short circuit on the rectifier at motor side
Burnt D type resistor
Having too much carbon powder on carbon brush holder
Burnt motor
Damaged circuit board resulting from the winding-in of rope
Overload
Short circuit on the commutator of the armature core or burnt parts of armature coils
Burnt parts of armature winding
Incorrect carbon brush specification too short
Burnt, deformation of carbon brush holder
The gap of ratchet brake is too large
Malfunction of pressed spring of ratchet brake
The oil is too dirty of includes contamination
Having too much oil in gear box
Malfunction of D type resistor
Malfunction of pressed spring of ratchet brake
Burnt D type resistor
Malfunction of B contact of the pendant switch
The noise result from the click between ratchet stopper and wheel
EN pg.10
REMEDY
Check power lead or switch cord
Replace rectifier and pay attention to its poles
Replace motor
Replace
Check or replace carbon brush
Check or replace carbon brush lead
Adjust r re-install the limit switch until having sound
Replace diode and pat attention to its poles
Replace limit switch
Replace rectifier and pay attention to its poles
Replace pendant switch
Adjust or re-install the limit switch until having sound
Replace limit switch
Adjust
Adjust
Replace diode and pay attention to its poles
Replace pendant switch
Replace rectifier and pay attention to its poles
Replace pendant switch
Replace pendant switch
Replace diode and pay attention to its poles
Replace rectifier and pay attention to its poles
Replace resistor
Disassembly the winch and clean carbon powder
Replace motor
Replace circuit board
Reduce load
Replace commutator of the armature core
Replace armature winding
Replace carbon brush
Replace carbon brush holder
Adjust the ratchet brake
Replace pressed spring
Replace oil
Reduce the quantity of oil
Check or replace D type resistor
Replace pressed spring
Replace D type resistor
Replace pendant switch
It is normal