Veichi SI21 - Page 15

SI21 Solar Pump VFD Manual
13
performed on the rotating
motor.
●A sudden load is added
during
acceleration.
●The AC drive model is of
too small power class.
●Remove the added load.
●Select an AC drive of higher
power class.
E.oC3
Over current
at constant
speed
●The output circuit is
grounded or short circuited.
●Motor auto-tuning is not
performed.
●The voltage is too low.
●A sudden load is added
during operation.
●The AC drive model is of
too small power class
●Eliminate external faults.
●Perform the motor auto tuning.
●Adjust the voltage to normal
range.
●Remove the added load.
●Select an AC drive of higher
power class.
E.oL1
Motor
overload
●Boost torque is too big
under VF control
●ACC. and DEC. time is too
short
●Motor parameters setting is
improperly
●Restart motor which in
counter rotate
●The grid voltage is too
lower
●Load is too big or motor
block load
●AC drive selected is too
load
●Reduce boost torque
●Increase the ACC./DEC. time
●Reset motor parameters
●Reduce current limit and adopt
speed tracking
●Check grid voltage
●Check load condition
●Change bigger power AC drive
E.oL2
AC drive
overload
●Boost torque is too big
under VF control
●ACC. and DEC. time is too
short
●Motor parameters setting is
improperly
●Restart motor which in
counter rotate
●The grid voltage is too
lower
●Load is too big or motor
block load
●Reduce boost torque
●increase the ACC./DEC. time
●reset motor parameters
●Reduce current limit and adopt
speed tracking
●Too check grid voltage
●Too check load
●change bigger power AC drive