COMEUP Heavy Duty DC Hoist (Ver:01) - Manual (Page 14)

VIII.Trouble Shootings
12
Checking the hoist for smooth operation by pressing ↑and ↓ buttons of pushbutton switch .
When hoist fails to start after several attempts , or if any defective operation to be happened ,
check followings .
Observed anomaly Possible cause Solution
No reaction
No power Check power source
Disconnection of plug, power cord
or switch cord
Replace or repair
Burnt or communicated motor Replace
Burnt diode assembly Replace, clean motor
Considerable voltage down
Ascertain the corrective input
power source
Lifting speed to be slow
Overload Reduce load
Considerable voltage down
Check voltage
Check the section of power cord
Electricity leakage or
shock
Burnt motor resulting from overload Replace motor
Carbon brush worn down
Replace it and clean powder left in
motor
Water invaded in motor or
pendant switch
Dry
Replace
Breaking distance more
than 1.5%
Brake disc worn down Replace
Burnt D type resistor Replace
Voltage too high Check power source
Hoist vibrates badly or is
noisy
Insufficient oil resulting from oil
leakage
Replace oil seal
Fill with sufficient oil
Damaged brake Replace or repair brake
Mounting surface is not flat Make sure mounting surface is flat
Tie bar is bent Replace tie bar
Crack on the motor and gearbox
support racks
Replace racks