Siemens SIMOTICS M-1PH8 User Manual

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 Rotor (partially) demagnetized Contact the Service Center.
X X X X Overload Reduce the load.
X Interruption of a phase in the feeder
cable
Check the frequency converters and feeder cables.
X X X X Interrupted phase in the feeder ca‐
ble after switching on
Check the frequency converters and feeder cables.
X X X X Winding short circuit or inter-phase
short circuit in stator winding
Determine the winding resistances and insulation re‐
sistances. Contact the Service Center.
X Converter output voltage too high,
frequency too low
Check the settings at the frequency converter and
perform the automatic motor identification.
X X Cooling water not connected
Cooling water supply switched off
Water connection / pipes defective
Check the cooling water connection. Switch on the
cooling water supply.
Find the leak and seal it. Contact the Service Center.
X X Cooling water flow rate too low
Inlet temperature too high
Increase the cooling water flow.
Set the correct upstream temperature.
8.10.4 Mechanical faults
Table 8-3 Mechanical faults
↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults Remedial measures
X Rotating parts are grinding Establish the cause and realign the parts.
X Rotor not balanced Contact the Service Center.
X Rotor out of true, shaft bent Contact the Service Center.
X X Poor alignment Align the machine set and check the coupling.
1)
X Coupled machine not balanced Rebalance the coupled machine.
X Shocks from coupled machine Examine the coupled machine.
X X Resonance with the foundation Stabilize the foundation after prior discussion.
X X Changes in foundation Determine the cause of the changes and, if necessa‐
ry, rectify. Realign the machine.
1)
Take into account possible changes which may occur during overheating.
Operation
8.10 Faults
SIMOTICS M-1PH8 1PH818., 1PH822.
98 Operating Instructions 07/2016

Siemens SIMOTICS M-1PH8 Specifications

General

Brand	Siemens
Model	SIMOTICS M-1PH8
Category	Engine
Language	English