33
2. Possible malfunctions and trouble shooting
a) Mechanical malfunctions
b) Electrical malfunctions
Motor protection switches off
Electronic parts shall be checked
by a skilled electrician
Remove the foreign material
causing overload
Frequency converter shows a
malfunction
Remove the foreign material
Jammed stone or wooden piece
Remove cause for malfunction.
Possibly by running elevator
backwards (turn switch left to
position "1" or "2")
Rotating assembly has too much
clearance.
Worn shifting roll or carrier bolt
Replace shifting roll or carrier
bolt.
Remove source of interference.
Broken return spring at switch
neutral gear
Free wheel hub is defective