Insufficient Starting Torque; Motor Rotates After The Drive Output Is Shut Off (Motor Rotates During Dc Injection Braking); Output Frequency Is Not As High As Frequency Reference; Motor Does Not Restart After Power Loss - YASKAWA FSDrive-MV1000 Series Instructions For Use Manual

5.11 Troubleshooting without Fault Display
u Insufficient Starting Torque
Cause
Auto-Tuning has not yet been performed (required for
vector control modes).
The control mode was changed after performing
Auto-Tuning.
Only Stationary Auto-Tuning was performed.
u Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection
Braking)
Cause
DC Injection Braking is set too low and the drive cannot
decelerate properly.
The stopping method is set so that the drive coasts to
stop.
u Output Frequency is not as High as Frequency Reference
Cause
Frequency reference is set within the range of the Jump
frequency.
Upper limit for the frequency reference has been
exceeded.
Large load triggered Stall Prevention function during
acceleration.
u Motor Does Not Restart after Power Loss
Cause
The Run command was not reissued again when power
was restored.
188
Perform Auto-Tuning. Refer to
details.
Perform Auto-Tuning again.
Perform Rotational Auto-Tuning.
• Adjust the DC Injection braking settings.
• Increase the current level for DC Injection Braking (b2-02).
• Increase the DC Injection Braking time at stop (b2-04).
Set b1-03 (Stopping Method Selection) to 0 or 2.
• Adjust the parameters used for the Jump frequency function (d3-01, d3-02, d3-03,
d3-04).
• Enabling the Jump frequency prevents the drive from outputting the frequencies
specified in the Jump range.
• Set the maximum output frequency and the upper limit for the frequency reference to
more appropriate values (E1-04, d2-01).
• The following calculation yields the upper value for the output frequency:
E1-04 × d2-01 / 100
• Reduce the load.
• Adjust the Stall Prevention level during acceleration (L3-02).
Check the sequence and wiring that has been set up to enter the Run command.
Set up a relay should to ensure the Run command remains enabled throughout any
power loss.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
Possible Solutions
Motor Performance Fine-Tuning on page 140
Possible Solutions
Possible Solutions
Possible Solutions
for