Table 8-1
Electrical faults
↓ Motor fails to start
↓ Motor accelerates sluggishly
↓ Humming noise when starting
↓ Humming noise in operation
↓ High temperature rise during no-load operation
↓ High temperature rise under load
↓ High temperature rise of individual winding sections
Possible causes of faults
Remedial measures
X
X
X
X
Overload
Reduce the load.
X
Interruption of a phase in the
supply cable
Check frequency converters and supply cables.
X
X
X
X
Interruption of a phase in the
supply after switching on
Check frequency converters and supply cables.
X
X
X
X Winding short circuit or phase
short circuit in stator winding
Determine the winding and insulation resistances. Con‐
tact the Service Center.
X
Converter output voltage too
high, frequency too low
Check the settings at the frequency converter and per‐
form the automatic motor identification.
X
External fan is not running
Check the external fan and its connections.
X
Wrong direction of rotation of the
external fan
Check the electrical connections to the external fan.
X
Reduced air intake
Check the air ducts; clean the machine.
8.10.3
Electrical faults at water-cooled motors
Note
When operating the machine with a converter, also refer to the operating instructions of the
frequency converter if electrical faults occur.
Table 8-2
Electrical faults
↓ Motor fails to start
↓ Motor accelerates sluggishly
↓ Humming noise when starting
↓ Humming noise in operation
↓ High temperature rise during no-load operation
↓ High temperature rise under load
↓ High temperature rise of individual winding sections
Possible causes of faults
Remedial measures
X
X
X
X
Overload
Reduce the load.
X
Interruption of a phase in the feeder
cable
Check the frequency converters and feeder cables.
Operation
8.10 Faults
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
Operating Instructions 10/2017
101
Содержание SIMOTICS M-1PH818
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Страница 14: ...Introduction SIMOTICS M 1PH8 1PH818 1PH822 1PH828 14 Operating Instructions 10 2017 ...
Страница 28: ...Description SIMOTICS M 1PH8 1PH818 1PH822 1PH828 28 Operating Instructions 10 2017 ...
Страница 66: ...Mounting 5 5 Refitting the external fan SIMOTICS M 1PH8 1PH818 1PH822 1PH828 66 Operating Instructions 10 2017 ...
Страница 104: ...Operation 8 10 Faults SIMOTICS M 1PH8 1PH818 1PH822 1PH828 104 Operating Instructions 10 2017 ...
Страница 132: ...Maintenance 9 3 Repair SIMOTICS M 1PH8 1PH818 1PH822 1PH828 132 Operating Instructions 10 2017 ...
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