7 Troubleshooting
7-10
FVR-C11S-EN
7
3) When motor stalls during acceleration
In the following cases, change of motor speed is
also restricted.
1. Bias frequency (F18) setting value is large.
2. Signals are input from both control termi-
nals 12 and C1 and there is no significant
change in the added value.
(When F01 is 3)
3. Load is excessive and stall prevention
function is activated.
Motor stalls during
acceleration
Acceleration time
setting too short?
Yes
Prolong time
setting.
No
Moment of inertia
of motor or load
excessive?
Yes
Special
motor
in use?
Yes
Consult with
Fuji Electric.
No
No
Reduce moment
of inertia of load
or increase
inverter capacity.
Motor
terminal voltage
lowered?
Yes
Use thicker cable
for wiring
between inverter
and motor, or
shorten wiring
length.
No
Torque of load
excessive?
No
Setting of torque
boost amount
correct?
No
Increase torque
boost amount.
Yes
Yes
Reduce torque of
load or increase
inverter capacity.
Probably faulty
inverter or error
because of noise,
etc. Contact
Fuji Electric.
