Troubleshooting
‑103‑
Table 3–4 Troubleshooting in FVC mode
Problem Solution
Overload or overcurrent
fault detected during
startup
Set the encoder resolution (PPR), encoder type and encoder
direction correctly.
Overload or overcurrent is
detected during motor
running.
Set motor parameters F1‑01 to F1‑05 according to the motor
nameplate.
Perform auto‑tuning (F1‑37) on motor parameters. Perform
dynamic complete auto‑tuning if possible.
Slow torque/speed
response and motor
oscillation occur at a
frequency below 5 Hz.
Increase the value of F2‑00 (Speed loop proportional gain)
by the step value of 10 or decrease the value of F2‑01 (speed
loop integral time) by the step value of 0.05 to improve the
torque/speed responsiveness.
If oscillation occurred, decrease the value of F2‑00 and F2‑
01.
Slow torque/speed
response and motor
oscillation occur at a
frequency above 5 Hz.
Increase the value of F2‑03 (Speed loop proportional gain)
by the step value of 10 or decrease the value of F2‑04 (speed
loop integral time) by the step value of 0.05 to improve the
torque/speed responsiveness.
If oscillation occurred, decrease the value of F2‑03 and F2‑
04.
Obvious speed fluctuation Increase the value of F2‑07 (Filter time constant of speed
loop) by the step value of 0.001s when motor speed
fluctuates abnormally.
Excessive motor noise
Increase the value of F0‑15 (Carrier frequency) by the step
value of 1.0 kHz. Note that increasing the carrier frequency
will lead to an increase in the motor leakage current.
Insufficient motor torque
or force
Check whether the torque upper limit is too low. If yes,
increase the value of F2‑10 (Torque upper limit in speed
control mode) in the speed control mode or the value of the
torque reference in the torque control mode.
● V/f control mode (F0‑01 = 2)
This mode applies to applications without an encoder for speed feedback. You
only need to set the rated motor voltage and rated motor frequency correctly.
Table 3–5 Troubleshooting in V/f control mode
Problem Solution
Motor oscillation during
running
Decrease the value of F3‑11 by the step value of 5. The
minimum value is 5.
Overcurrent at startup with
high power
Decrease the value of F3‑01 by the step value of 0.5%.
Excessively high current
during operation
Set F1‑02 (Rated motor voltage) and F1‑04 (Rated motor
frequency) correctly.
Decrease the value of F3‑01 by the step value of 0.5%.
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