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Faults and their rectification
Table 9- 1
Fault
Motor does not start
Motor starts slowly
Humming sound when starting
Humming sound in operation
High temperature rise under no-load
operation
High temperature rise under load
High temperature rise of individual
winding sections
Uneven running
Grinding sound, running noise
Radial vibrations
Axial vibrations
Table 9- 2
"Fault causes and remedial measures" key table
No.
Cause of fault
A
Overload
B
Interruption of a phase in the supply ca-
ble / motor winding
C
Interrupted phase in the feeder cable
after switching on
D
Converter output voltage too high, fre-
quency too low
F
Winding short-circuit or phase short-
circuit in stator winding
I
Heat dissipation impeded by deposits
Cooling air inlet/outlet is blocked by for-
eign bodies
J
Insufficient shielding for motor and/or
encoder cable
K
Excessive drive controller gain
L
Rotating parts are grinding
Foreign bodies inside the motor
Bearing damage
M
Rotor not balanced
N
Rotor out of true, shaft bent
O
Poor alignment
P
Coupled machine not balanced
Q
Shocks from coupled machine
R
Fault originating from the gear unit
If the fault still cannot be resolved after taking the measures stated above, please contact the
manufacturer or the Siemens Service Center.
86
Possible faults
Remedial measures
Reduce load
Check the frequency converter and supply cables, measure the winding
resistances and insulation resistances, repair after consultation with
manufacturer
Check the frequency converter and supply cables/check the winding
resistances
Check the settings on the frequency converter, perform automatic motor
identification
Measure the winding resistances and insulation resistances, repair after
consultation with manufacturer
Clean the surface of the drives and ensure that the cooling air can flow
in and out unimpeded
Remove the block and ensure that the cooling air can flow in and out
unimpeded
Check the shielding and grounding
Adjust the controller
Determine cause and adjust parts
Send to manufacturer for repair
Send to manufacturer for repair
Decouple rotor and rebalance
Consult the manufacturer
Align motor set, check coupling
Re-balance coupled machine
Check coupled machine
Adjust/repair gear unit
Fault cause (see "Fault causes and remedial measures"
key table)
A B
A
C
F
C
F
A
C
F
D
A
C
F
S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
I
I
J
K
L
M N O P
O
R
Q R
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