Chapter 7 Troubleshooting |VFD-B Series

7.11 Motor Stalls during Acceleration

Motor stalls during

acceleration

Check if acceleration Yes

time is too short

No

Check if the inertia Yes

of the motor and load

is too high

No

Thicken or shorten the

wiring between the

motor or AC motor drive

Yes

Check for low voltage

at input

No

Reduce load or

increase the capacity

of AC motor drive

Yes Check if the load torque

is too high

No

Check if the torque

Yes

compensation is suitable

No

Increase setting time

Yes

Use special motor?

No

Reduce load or

increase the capacity

of AC motor drive

Maybe AC motor drive has

malfunction or misoperation

due to noise. Please contact

DELTA

Increase torque compensation

7.12 The Motor does not Run as Expected

Motor does not run

as expected

Check Pr. 01-01 thru Pr. 01-06

and torque compensation

settings

No

Adjust Pr.01-01 to Pr.01-06

and lower torque compensation

Yes

Run in low speed continuously Yes

No

Is load too large Yes

No

Please use specific motor

Reduce load or increase the

capacity of AC motor drive

Check if output voltage of U, V, W Yes

is balanced

No

Motor has malfunction

Maybe AC motor drive has malfunction or misoperation

due to noise. Please contact DELTA.

7-8

Revision July 2008, BE16, SW V4.08 & V5.00