Lenze MDxMA-MHxMA-MFxMA-MDERA-MHERA Three-phase AC motors - Manual (Page 57)

Troubleshooting and fault elimination 9
l
57 BA 33.0005−EN 2.0
9 Troubleshooting and fault elimination
If faults occur during operation of the drive system:
ƒ First check the possible causes of malfunction according to the following table.
)
Note!
Also observe the corresponding chapters in the operating instructions for the
other components of the drive system.
If the fault cannot be remedied using one of the listed measures, please contact the Lenze
Service.
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Danger!
ƒ Only work on the drive system when it is in a deenergised state!
ƒ Hot motor surfaces of up to 140 °C. Observe cooling times!
ƒ Remove loads acting on motors or secure loads acting on the drive!
Fault Cause Remedy
Motor too hot
Can only be evaluated by
measuring the surface
temperature:
l Non−ventilated motors
> 140 °C
l Externally ventilated or
self−ventilated motors
> 110 °C
Insufficient cooling air, blocked air
ducts. Ensure unimpeded circulation of cooling air
Preheated cooling air Ensure a sufficient supply of fresh cooling air
Overload, with normal mains
voltage the current is too high and
the speed too low Use larger drive (determined by power measurement)
Rated operating mode exceeded (S1
to S8 IEC/EN 60034−1) Adjust rated operating mode to the specified operating
conditions. Determination of correct drive by expert or Lenze
customer service
Loose contact in supply cable
(temporary single−phase operation!) Tighten loose contact
Fuse has blown (single−phasing!) Replace fuse
Overloading of the drive l Check load and, if necessary, reduce by means of longer
ramp−up times
l Check winding temperature
Heat dissipation impeded by
deposits Clean surface and cooling ribs of the drives
Motor does not start Voltage supply interrupted l Check error message on the drive controller
l Check electrical connection ^ 32
Controller inhibited l Check display at drive controller
l Check controller enable
Fuse has blown Replace fuse
Encoder cable broken l Check error message at drive controller
l Check encoder cable
Brake does not release Check electrical connection, ^ 32
Check air gap, ^ 52
Check continuity of magnetic coil
Drive is blocked Check components for easy movement, remove foreign
particles if necessary
Motor cable polarity is reversed Check electrical connection, ^ 32
Motor suddenly stops and
does not start again Overload monitoring of the inverter
responds l Check settings on controller
l Reduce load by means of longer acceleration times