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Status
Motor Overload Protection (EOL)
Red Fault LED steady lighting, and LCD
event code P1.
See chapter 6.1.2.1 about LED status indi-
cators activation for faults and protections.
Remark that time delay for reset can be
long depending on temperature.
Ready
Run
Protection
Underload Protection
Red Fault LED steady lighting, and LCD
event code P2.
See chapter 6.1.2.1 about LED status indi-
cators activation for faults and protections.
Ready
Run
Protection
Locked Rotor Protection
Red Fault LED steady lighting, and LCD
event code P3.
See chapter 6.1.2.1 about LED status indi-
cators activation for faults and protections.
Ready
Run
Protection
92
Chapter 10
Softstarters Type PSE18...PSE370 Installation and commissioning manual 1SFC132057M0201
10.7 Protection indications
Possible cause
Load on motor higher than motor rating
and corresponding selected EOL Class.
Too many starts and stops during a short
time.
Fault
The motor has been exposed to an over-
load condition because the current over a
certain time is too high. (The load on the
motor shaft is too high).
The motor current is below set level and
time.
Fault
The motor is running stiff for some reason.
A damaged bearing or a stuck load could
be possible causes.
Decrease in operational voltage can give a
higher operational current.
Fault
Solution
At start
•
Check and correct the reason for the
overload.
•
Increase Initial/End Voltage.
•
Check the motor rating plate for I e .
•
Increase Current Limit.
•
Make Start Ramp Time shorter.
At start
•
Chose a motor with more power, and
a softstarter rated for higher current.
•
Check and correct the reason for the
overload.
•
Check that the ramp time for start not
is too long.
•
Check that correct EOL Class is used.
Continuous run
•
Check the rating of the plate for I e .
•
Check operational voltage.
•
Chose a motor with more power, and
a softstarter rated for higher current.
•
Check and correct the reason for the
overload.
•
Check that correct EOL Class is used.
•
Check and correct the reason for the
underload.
•
Check that the setting I e are accord-
ing to the operation conditions. See
chapter 7.5.1.
•
Check that the Underload Protection
parameter is set according to opera-
tional conditions. Se chapter 7.5.10.
•
Check the bearings of the motor and
load.
•
Check voltage.
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