- 136 -
Error
Solution
Motor oscillation
during running
1. Increase the setting of P3-11 (V/F oscillation suppression gain)
by 10 gradually. The permissible maximum setting here is 100.
Over current during
start
1. Decrease the setting of P3-01 (torque boost) by 0.5% gradually.
Too loud motor noise
1. Increase the setting of P0-15 (carrier frequency) by 1.0 kHz
gradually. Note that increase in carrier frequency will result in an
increase in the leakage current of the motor.
Very large current
during running
1. Set rated motor voltage (P1-02) and rated motor frequency (P1-
04)
correctly.
2. Decrease the setting of P3-01 (torque boost) by 0.5% gradually.
Over voltage detected
when heavy load is
suddenly removed or
during deceleration
1. Ensure that P3-23 (voltage limit selection) is set to 1 (enabled).
Increase the setting of P3-24/P3-25 (frequency gain/voltage gain
for
voltage limit) by 10 gradually. The permissible maximum
setting here is
100.
2. Decrease the setting of P3-22 (voltage limit 770v) by 10 V
gradually. The
permissible minimum setting here is 700 V.
Over current detected
when heavy load is
suddenly added or
during acceleration
1. Increase the setting of P3-20 (93-20 factory default set 20) by 10
gradually. The permissible maximum setting here is 100.
2. Decrease the setting of P3-18 (P3-18 factory default is 150%) by
10% gradually.
The permissible minimum setting here is 50%.
8.2 Fault Display
When a fault occurs during running, the operation panel displays the fault code such as
shown in the following figure.
Fault display
Fault reason
Error settlement
Over
current
during
acceleration
FU02
Ground fault or short circuit
exists in
the output circuit.
Check whether short-circuit occurs
on the motor, motor cable or
contactor.
Control mode is FVC or
SVC but motor auto-tuning
is not performed.
Set motor parameters according to
motor nameplate and
perform motor
auto-tuning.
Acceleration time is too
short.
Increase acceleration time.
The over current stall
prevention
parameters are set
improperly.
Ensure that current limit is enabled
(P3-19 = 1).
The setting of current limit level (P3-
18) is too large. Adjust it
between 120% and 150%.
The setting of current limit gain (P3-
20) is too small. Adjust it
between 20 and 40.
