8.9.2
Faults in operation
Table 8-2
Faults in operation
Symptoms of fault
↓
General uneven running of machine
↓
Vibrating brushes
↓
High temperature rise (general)
↓
Severe brush sparking
Possible causes of faults
Remedial measures
Plant fault
X
Coupled motor out of balance
Check coupling, rebalance system
X
X
Poor alignment
Align motor set
X
X
X
Resonance in system
Improve installation conditions or reduce exci‐
tation of vibration
Operating mode or operating error
X
Continuous light-load duty (partial load)
Change number of brushes and/or material
X
Temporary overload
Correct current limit on converter
X
Continuous overload
Correct current limit on converter/reduce down
periods of rest
Cooling fault
X
Cooling air-flow rate too low (commutator temper‐
ature too high)
Improve ventilation circuit
Component defect
X
Interturn fault
Repair winding
X
X
Out-of-round commutator
Rework commutator
X
Rotor imbalance
Balance rotor
X
Bearing damage
Repair or replace bearing
8.9.3
Faults at the external fan
The following table shows the possible causes of and remedial measures for faults on forced-
ventilated machines.
Table 8-3
Cooling system faults
↓ High temperature rise with load
Possible causes of faults
Remedial measures
X Wrong direction of rotation of the external fan Check the electrical connections to the external fan.
X External fan is not running
Check the external fan and its connections.
X Reduced air flow
Check the air ducts; clean the machine.
Operation
8.9 Faults
SIMOTICS DC 1GG6
78
Operating Instructions 02/2016
Summary of Contents for SIMOTICS DC 1GG6
Page 2: ...08 02 2016 10 27 V4 00 ...
Page 12: ...Table of contents SIMOTICS DC 1GG6 12 Operating Instructions 02 2016 ...
Page 14: ...Introduction 1 1 About these instructions SIMOTICS DC 1GG6 14 Operating Instructions 02 2016 ...
Page 70: ...Commissioning 7 8 Switch off SIMOTICS DC 1GG6 70 Operating Instructions 02 2016 ...
Page 82: ...Operation 8 9 Faults SIMOTICS DC 1GG6 82 Operating Instructions 02 2016 ...
Page 104: ...Maintenance 9 2 Repair SIMOTICS DC 1GG6 104 Operating Instructions 02 2016 ...
Page 138: ...Service and Support SIMOTICS DC 1GG6 138 Operating Instructions 02 2016 ...
Page 142: ...Quality documents SIMOTICS DC 1GG6 142 Operating Instructions 02 2016 ...
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