Owner's manual

Troubleshooting and fault elimination8
l
54
BA 13.0009 − EN 2.1
8 Troubleshooting and fault elimination
ƒ If faults during operation of the drive system occur:
– First check possible error causes by means of the following table.
– Also observe the corresponding chapters in the Operating Instructions of the other
drive system components.
ƒ If the fault cannot be eliminated by one of the measures itemised, please notify the
Lenze service.
Fault Possible cause Remedy
Motor does not start
Voltage supply interrupted Check electrical connection (chapter 5)
Resisting moment of the load too
great
Check load and, if required, reduce it (check application)
Brake does not release
Check electrical connection
Check air gap "s
Lü
" (see Operating Instructions of brake)
Check duct of the solenoid coil
Drive blocks Check components with regard to free movement, possibly
remove contaminants from the motor or gearbox
Surface temperature u95°C
Overload of the drive Check load and, if required, reduce it
Heat dissipation impeded by
deposits
Clean surface of the drives
Motor suddenly stops and
does not start again
Overtemperature protector switch
interrupts voltage supply
Reduce load, let motor cool down (clean, see above)
Running noises
Contaminants inside the motor Cleaning of the interior, possibly repair by manufacturer
Bearing failures Mounting of new deep−groove ball bearings (chapter 7.1),
possibly repair by manufacturer
Motor does not rotate,
gearbox output is not
running
Input pinion or worm gear is missing Subsequently mount pinion or worm gear (chapter 5.5)
Wheel−hub connection defective
(overload)
Check connection and, if required, redowel; if required,
reduce load
Toothing worn out Repair by manufacturer or supplier
Irregular running, motor
stops
Carbon brushes worn out Replace brush set (chapter 7.1.2)
Carbon brushes are stuck, wear
debris in the guides
Cleaning of the interior (chapter 7.1.2 et seqq.)
Running noises
Carbon brushes are not run in Support the running−in by means of sanding chalk
Contaminants inside the motor Cleaning of the interior, possibly repair by manufacturer
Bearing failures Repair by manufacturer
Speed increase (Partial) demagnetisation of the
magnet segments
Repair by manufacturer