20
GB
Trolley
Problem
Possible cause
Actions
Jamming of the load chain
Distortionor twisting of the chain inside or
improper alignment with entry guide
Stop operation immediately
Continued operations might cause chain
failure. Contact supplier or an approved
service shop
Catching of the slack chain around an
obstacle
If the load is suspended, take up the load
with another device which provides the
equivalent safety, and remove the load
from the hoist. Try to release the chain,
and if not, send the hoist to an approved
service shop
The slack chain MUST be freed before
resuming operation
Overheating of hoist
Overload
Reduce the load
Low voltage
Have electrician correct low voltage
condition of power supply
Extremely hot operating environment
Ventilate or shield hoist from heat source
Frequent starting
Avoid inching operations
Brake does not open
Defective rectifier or brake coil
Call an approved service shop
Abnormal noise
Mechanical parts
Call an approved service shop
Unintentional lowering of load/the load
slips
Brake lining worn
Adjust the barkes gap (refer to section)
Oil or grease on the brakes’ lining
Spray the lining with brake cleaner and
wipe them off
Overload
Reduce the load if it exceeds the rated. If
the motion continues, send the device to
an approved service shop
Hoist will not lift load
Faulty friction clutch
Call an approved service shop
Low voltage
Have an electrician correct low voltage
condition of power
Problem
Possible cause
Actions
The trolley will not operate
Main isolating switch off
Set it to “on” position
Emergency stop activated
De activate the emergency stop
Power supply cut
Check all the electrical connections
Contacts on control station fautly
Call in an approved engineer
Rotates in one direction
Contactor coil burnt out
Call in an approved engineer
Movement of trolley reversed in relation to
buttons on control station
Power supply phases reversed
Reverse two phases
Poor rotation of trolley motor with muffled
noise
Faulty power supply network
Check the supply voltage
Significiant voltage drop
Check that voltage is correct and there is
no overload
Faulty gearbox
Call in an approved engineer
Overload
Check and reduce the load
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