Fault

Possible cause

Eliminating the fault

The chain hoist does not lift or lower; hoist motor does not hum when a button on the pendant control is pressed.

No mains voltage.

Check the power line. See page 16.

Power line not correct.

Check the rotary field and phases. See page 16.

Emergency stop button pressed.

Unlock the emergency stop button.

Main contactor is defective.

Check the main contactor.

With electronic control: No control voltage.

Check the fuse on the supply PCB.

Fuse is defective.

Check the fuse.

Bayonet couplings of the connection cable or control cable are not properly inserted.

Insert the bayonet couplings. See page 16.

Broken wire in the control cable.

Replace the control cable.

Pendant control is defective.

Replace the pendant control.

For hoist limit switch: Switching point is incorrectly set.

Reset the switching point.

The chain hoist does not lift or lower; hoist motor hums when a button on the pendant control is pressed.

Fuse is defective.

Check the fuse.

Power line is defective (2-phase running).

Check the power line. See page 16.

The couplings of the hoist motor and brake are interchanged on the control.

Connect the hoist motor and brake correctly. See page 92.

With electronic control: control is defective.

Replace the control.

With direct control: pendant control is defective.

Replace the control.

Hoist motor starts up sluggishly.

Brake does not release.

Check the brake.

Brake does not release.

Brake electronics are defective.

Measure the voltage on the brake. It must be approximately 90 V DC. If it is not, replace the electronics for the brake.

Brake coil in the magnet body is defective.

Measure the electrical continuity. If the brake coil has no continuity, replace the magnet body.

Fault

Possible cause

Eliminating the fault

The load sags when stationary.

Brake lining on the brake rotor is worn.

See page 69.

The load does not immediately come to a stop.

The air gap is too large.

Readjust the brake. See page 64.

The load sags during lifting or lowering.

The friction clutch is set too weak.

Adjust the friction clutch. Page 73.

The chain becomes worn very quickly.

The chain is not sufficiently lubricated.

Lubricate the chain. See page 62.

Loud clacking noises.

Chain and chain sprocket are worn.

Replace the chain and chain sprocket. See page 42.

The chain is not sufficiently lubricated.

Lubricate the chain. Lubricate the chain. See page 62.