Troubleshooting - ABB M3EB Serie Manual De Instalación, Operación, Mantenimiento Y Seguridad

8. Troubleshooting

These instructions do not cover all details or variations in
equipment, nor do they provide for every possible condi-
tion which may be encountered in relation to installation,
operation or maintenance. Should additional information
required, please contact the nearest ABB sales office.
Motor troubleshooting chart
Your motor service and any troubleshooting must be
handled by qualified persons who have the proper tools
and equipment.
PROBLEM
Motor does not start
Motor does not
reach the rated
speed
Motor runs in wrong
direction
Motor overheated
Vibrations or loud
noise
CAUSE
Power supply
Wrong connections
Mechanical brake locked
Mechanical failure
Overload
Supply voltage
Voltage too low at motor terminals
because of line drop
Overload
Overload
Failing ventilation
Wrong connections
Harmonic distortion
Foundation
Bearings failure
Misalignment
ACTION
Check the ratings of the power supply.
Check the connections of the power cables.
Check that the brake is supplied with 24VDC in
tolerance range and that is not locked.
Check that the mechanics coupled to the motor allow
free rotation.
Reduce the load or resize the motor.
Check the level of the supply voltage.
Use higher voltage or transformer terminals or reduce
load. Check connections. Check conductors for proper
size.
Reduce the load or resize the motor.
Exchange any two phases.
Reduce the load or resize the motor.
Clean the motor, the filters and the grid of the fan
motor. Check that the fan is operating. Check for free
ventilation and cooling.
Check that no phase is incidentally open or grounded.
High harmonic distortion in the frequency converter
output is not allowed.
Check that the foundation is adequate. Renew and
reinforce foundation if necessary.
If ball bearings contact ABB for replacements.
If roller bearings check for regular lubrication and
regrease if necessary. Do not exceed with grease
quantity. Contact ABB for repairs.
Check for correct alignment of motor and load.
Ignoring misalignment can cause serious damage of
bearings, shaft and mechanics.
9AKK105975, Rev. A 01-2015 | ABB Motors and Generators EN – 15