Operation
8.4 Faults
Synchronous/induction motors 1PH813
62 Operating Instructions, 04/2009, 610.48000.22
Table 8- 2 Key to causes of faults and remedial measures
No. Cause of fault Remedial measures
A Overload Reduce load
B Interruption of a phase in the supply
cable
Check frequency converter and supply cables
C Interruption of a phase in the supply after
switching on
Check frequency converter and supply cables
D Converter output voltage too high,
frequency too low
Check the settings on the frequency converter, perform automatic motor
identification
E Stator winding incorrectly connected Check winding connections
F Winding short circuit or phase short
circuit in stator winding
Measure the winding resistances and insulation resistances, repair after
consultation with manufacturer
Cooling water not connected / switched
off
Check cooling water connection / switch on cooling water G
Water connection / pipes defective Locate leaks and seal as necessary, or consult the manufacturer
Cooling water flow rate too low Increase cooling water flow rate H
Inlet temperature too high Set correct inlet temperature
Heat dissipation impeded by deposits Clean the surface of the drives and ensure that the cooling air can flow
in and out unimpeded
Cooling air inlet/outlet is blocked by
foreign bodies
Remove the block and ensure that the cooling air can flow in and out
unimpeded
I
Fan motor does not start up Make sure that the fan motor works properly
J Insufficient shielding for motor and/or
encoder cable
Check the shielding and grounding
K Excessive drive controller gain Adjust the controller
Rotating parts are grinding Determine cause and adjust parts
Foreign bodies within the motor Send to manufacturer for repair
L
Bearing damage Send to manufacturer for repair
M Rotor not balanced Decouple rotor and rebalance
N Rotor out of true, shaft bent Consult the manufacturer
O Poor alignment Align motor unit, check coupling
P Coupled machine not balanced Re-balance coupled motor
Q Shocks from coupled machine Check coupled motor
R Imbalance originating from gearing Adjust/repair gearing
S Cooling water pipe / water connection
defective
Locate leaks and seal as necessary, or consult the manufacturer
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