Eaton MP3010 - SECTION 12 - TROUBLESHOOTING; 12.2.1 Alarm Conditions; 12.2.2 Trip Conditions

IM02602002E
Page 12-4
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MP-3000

  Probable Cause Solution
IOC
GND FLT
INSTANTANEOUS
OVERCURRENT TRIP
GROUND FAULT TRIP
An electrical fault (short cir-
cuit) exists in the insulation of
motor or connecting circuits.
 If a motor trips on IOC
at the moment of starting,
and an expert has conrmed
no fault, the trip may be due
to magnetic inrush. Adjust
the IOC trip level and start
a delay to ride through the
inrush peak.
 Shut down and lock
out the motor. Get expert help
in evaluating the condition of
the motor and repair needs.
Do not try to restart the motor
without expert evaluation.
After or during repair or re-
placement of the motor, check
the fuses in the starter and
replace blown fuses.
JAM LOAD JAM TRIP A breakage or malfunc-
tion in the process driven
equipment or drive shaft has
occurred.
Lock out the motor starter for
safety. Check the process
equipment.
UNDER L UNDER LOAD RUN TRIP A breakage or malfunc-
tion in the process driven
equipment or drive shaft has
occurred.
Lock out the motor starter for
safety. Check shaft couplings,
shaft keys for breakage. Look
for blockage of process mate-
rial ow to motor-driven equip-
ment.
MB TEMP
LB TEMP
WD TEMP
AX TEMP
MOTOR BEARING OVER
TEMP TRIP
LOAD BEARING OVER
TEMP
TRIP STATOR WINDING
OVER TEMP TRIP
AUXILIARY OVER TEMP
TRIP
Bearings or the bearing lu-
brication system has failed.
Also, check RTD integrity.
Sustained overloading of
the motor or cooling air ow
blockage has occurred.
If the RTD is OK, the bearing
probably needs replacement.
Check the airow path. Look
for the cause of abnormal
loading. Check for abnormal
supply voltage.
LRC/I2T LOCKED ROTOR/
THERMAL OVERLOAD
TRIP
The thermal-model bucket
has lled to the trip level.
 This trip cannot be
reset until the thermal-model
bucket has cooled (emptied)
below the user-set I2T alarm
level. This time depends
on motor nameplate values
entered as settings.
• Determine if the motor is
seeing larger than expected
sustained loading.
• Check for unbalance in supply
currents or voltages causing
negative sequence heating.
• Check for abnormal system
voltage level.
• Check for cooling air blockage
or abnormal ambient.
INC SEQ INCOMPLETE SEQUENCE
TRIP
Discrete input 2 (DI 2) has
been set for the incomplete
sequence timing function via
setting P7L1. The 120 Vac
feedback signal from the
process or starter, expected
within the user-set time de-
lay, was not received in time
after the start or transition.
An interruption (of 20
seconds minimum to 40 sec-
onds maximum) causes an
incomplete sequence trip.
• Check to be sure this func-
tion has been intentionally
enabled.
• Check process feedback wir-
ing to be sure 120 Vac signal
is delivered in the expected
time.
• Use DI 2 test to conrm that
the MP-3000 sees an input.
•Check setting P5L8 against
the process feedback time.
•Check setting P5L9 to be sure
the correct timing start point is
selected - start or transition.
• If timing from transition, be
sure transition current and
time settings are correct.