Faults; Electrical Faults - Siemens 1PH818 Operating Instructions Manual

8.5

Faults

8.5.1

Electrical faults

Note
When operating the machine with a converter, please also refer to the operating instructions
of the frequency converter if electrical faults occur.
NOTICE
Damage to the machine caused by faults
Correct the cause of the fault as specified in the remedial measures section. Repair any
damage to the machine.
Table 8-1 Electrical faults
↓ Motor fails to start
↓ Motor accelerates reluctantly
↓ Rumbling noise during start-up
↓ Rumbling noise during operation
↓ Overheating during no-load operation
↓ Overheating with load
X X X X
X
X X X X
X
X X X
X X
X X
A5E02605207A AA
Siemens AG Operating Instructions V1.0 1PH8
↓ Overheating of individual winding sections
Possible causes of faults
Overload
Interruption of a phase in the supply cable Check frequency converters and supply
Interruption of a phase in the supply after
switching on
Converter output voltage too high,
frequency too low
X Winding short circuit or phase short circuit
in stator winding
Cooling water not connected
Cooling water supply switched off
Water connection / pipes defective
Cooling water flow rate too low
Upstream temperature too high
Remedial measures
Reduce the load.
cables.
Check frequency converters and supply
cables.
Check the setting at the frequency converter
and perform the automatic motor
identification.
Determine the winding and insulation
resistances. Carry out repair work after
consultation with manufacturer.
Check the cooling water connection. Switch
on the cooling water supply.
Locate the non-watertight section and seal it
or consult the manufacturer.
Increase the cooling water flow rate.
Set the correct upstream temperature.
Operation
8.5 Faults
53