ABB M10 Series User Manual

Condition Description Possible Cause Suggested Action
Phase unbalance Alarm Motor is about to be stopped.
The maximum imblance current of
any phase reaches the unbalance
alarm level.
phase unbalance in motor phase
currents generally occurs
because of pitted contacts in
the contactor or SCPD,
imbalance in the mains supply,
loose connections, blown fuse, and
faults within the motor.
Check for pitted contacts in
contactor or SCPD
Check for loose connection on
power supply
Check the motor connection
Underload Alarm Motor is about to be stopped.
The highest of the measured
phase currents is below the
alarm level.
Motor current is below the alarm
setting; motor running idle, dry
running pump, conveyor belt
broken; fan with no air flow
Check motor load and motor /
process conditions.
Check parameter settings.
Noload Alarm Motor is about to be stopped.
The highest of the measured
phase currents is below the
alarm level.
Motor current is below the alarm
setting; motor running idle, dry
running pump, conveyor belt
broken; fan with no air flow
Check motor load and motor
process conditions.
Check parameter settings.
Earth Fault Alarm Motor is about to be stopped.
Residual current for cable(s),
motor and connection box above
alarm level .
Measured Earth Fault Current
exceeds above the Alarm level
Insulation problems for cable(s),
motor and connection box or
reduced insulation strength
due to extreme ambient conditions.
Check parameter settings.
Check Earthing system.
Check motor or connected load.
PTC Alarm * Motor is about to be stopped.
The resistance corresponding to
the high temperature at one or
more of the thermistors exceeds
alarm level
Excessive temperature rise in
the windings and reaches alarm
level
Check motor environmental and
load condition
Undervoltage Alarm * Motor is about to be stopped.
The lowest of the measured
voltages is below the alarm level.
Voltage dip below the alarm level Check parameter settings.
Check main supply
Autoreclose Alarm * Motor is about to restart after the
voltage dip
Voltage dip is measured and the
autorestart function is active
N/A
Feedback Alarm Motor is about to be stopped.
Contactor feedback or current
feedback is not as expected.
Contactor feedback is not
detected or the current is not
measured during motor starting
or running.
Check for loose connection of
contactor feedback
Check for contactor control
Check motor load and motor
process condition
Welded Contactor Alarm Motor is stopped. Contactor
feedback is not as expected.
Contactor welded fault Check parameter settings.Check
contactors Check motor
PTC short circuit * The resistance of PTC input is
lower than the alarm level
PTC short circuit Check parameter settings.
Check PTC wiring between motor
and relay
PTC open circuit * The resistance of PTC input
exceeds 12kΩ
PTC open circuit Check parameter settings.
Check PTC wiring between motor
and relay
Start limitation Alarm Motor is about to be stopped and
one more start is allowed
motor starts too frequent Check parameter settings.
Serial Communication Alarm Before the permitted time delay
elapse,
M10x considers loss of
communication
communication interruption
between m10x and upper control
system
Check parameter settings.
Check network interface
Running time Alarm The Running timer exceeds the
preset running time alarm level
This helps to lubricate and
maintain the bearings of the
motor within the correct service
interval.
Check parameter settings.
Check motor
Start number Alarm The start counter exceeds the
set value of cycles in preset start
number alarm level
This help in carrying out
preventive maintenance of
power contacts.
Check parameter settings.
Check contactors
92 M OTO R CO NTRO L A N D PROTE C TI O N U N IT M10X USER G U I D E

ABB M10 Series Specifications

General

Brand	ABB
Model	M10 Series
Category	Controller
Language	English