YASKAWA V1000 Series Installation & Start-Up Manual page 250

5.10 Detailed Troubleshooting
Cause
Motor is not producing enough torque in
the V/f motor control method.
Motor is not producing enough torque in
Open Loop Vector Control.
The drive is set for both 2-wire and
3-wire sequence at the same time.
Motor Rotates in the Opposite Direction from the Run Command
■
Cause
Phase wiring between the drive and motor
is incorrect.
250
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
• Ensure the selected V/f pattern corresponds with the characteristics of
the motor being used.
• Set the correct V/f pattern to E1-03.
• When E1-03 = F, increase both the minimum and mid output
frequency voltages (E1-08, E1-10).
Increase the frequency reference so that it is higher than the minimum
frequency reference (E1-09).
Perform Line-to-Line Resistance Auto-Tuning when using particularly
long motor cables.
Increase the torque compensation gain (C4-01).
• Execute Rotational Auto-Tuning.
• If the motor cables are replaced with longer cables after Rotational
Auto-Tuning was performed, Auto-Tuning may need to be repeated
due to voltage drop across the line.
• Check if the torque limit parameters have been set too low (L7-01
through L7-04).
• Reset the torque limit back to its default setting (200%).
Increase both the minimum and mid output frequency voltages
(E1-08 and E-10).
• The drive is set for a 3-wire sequence when one of parameters H1-01
through H1-07 is set to 0.
• If the drive is supposed to be set up for a 2-wire sequence, then ensure
parameters H1-01 through H1-07 are not set to 0.
• If the drive is supposed to be set up for a 3-wire sequence, then
H1- must be set to 0. Refer to
information.
• Check the motor wiring.
• Two different motor phases may be accidentally connected to the same
terminal. Check the motor line connections.
• Connect drive output terminals U/T1, V/T2 and W/T3 in the right order
to the corresponding motor terminals U/T1, V/T2 and W/T3.
• Correct wiring mistakes.
Possible Solutions
Figure 5.2 for additional
Possible Solutions