Troubleshooting and fault elimination8
48
BA33.0001 EN 2.0
RemedyCauseFault
Motor does not start
Voltage supply interrupted
z
Check error message at drive controller
z
Check electrical connection (
E
Ch. 5)
Controller inhibited
z
Check display at drive controller
z
Check controller enable
Fuse is blown Replace fuse
Motor protection responded Check motor protection for correct setting and adjust it
Motor contactor does not engage,
fault in the control
Check control of motor contactor and remove fault
Resolver cable is interrupted
z
Check error message at drive controller
z
Check resolver cable
Brake does not release
Check electrical connection
Check air gap (see Brake operating instructions)
Check continuity of magnetic coil
Drive is blocked Check components for easy movement, remove foreign bodies
if necessary
Motor cable polarity is reversed Check electrical connection
Motor stops suddenly and
does not start again
z
Polarity reversal of motor cable
or
z
polarity reversal of resolver
z
Connect the phases at the motor cable connection correctly
and
z
connect the encoder correctly
Overtemperature protector switch is
activated
z
Let motor cool down
– Reduce load caused by longer acceleration times
Overload monitoring of the inverter
is activated
z
Check settings on controller
z
Reduce load caused by longer acceleration times
Wrong direction of rotation
of the motor, correct
display at controller
Reversed motor cable and resolver
cable
z
Swapping two phases of the motor cable
and
z
+COS/-COS connections of the resolver connection
Motor rotates normally but
does not reach the
expected torque
Motor cable cyclically interchanged Connect the phases at the motor cable connection correctly
Motor rotates uncontrolled
in one direction at
maximum speed
Motor cable is cyclically interchanged
or polarity reversal of resolver cable,
e.g. connections +Ref/-Ref
Check motor connection for resolver connection
Motor rotates slowly in
one direction and cannot
be influenced by the
controller (only in the case
of the asynchronous
motors MDXKA, MDFQA,
MDXMA)
Polarity reversal of motor or resolver
cable
z
Swap two phases of the motor cable
or
z
the +COS/-COS connections of the resolver
Motor does not rotate,
gearbox output is not
Defective wheel-hub connection Check the connection, replace the featherkey, if necessary,
repair by the manufacturer
running
Toothing worn out
Repair by the manufacturer
Uneven running
Insufficient shielding of motor or
resolver cable
Check shielding and earthing (
E
Ch. LEERER MERKER)
Drive controller gain too large Adjust the gains of the controllers (see Drive controller
operating instructions)
Vibrations
Insufficiently balanced coupling
elements or machine
Rebalance
Inadequate alignment of drive train Realign machine, if necessary, check foundation
Loose fixing screws Check screwed connections and tighten if necessary
Running noises
Foreign bodies inside the motor Repair by manufacturer, if necessary
Bearing damage, spindle damage Repair by manufacturer, if necessary
Surface
temperature > 140 °C
Overload of drive
z
Check overload and reduce through longer acceleration
times, if necessary
z
Check winding temperature (
E
Ch. 9.2.2)
Heat removal restricted due to
deposit build-up
Clean surface and cooling ribs of the drives
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