Delta VFD11AMS23ANSAA - Page 505

Chapter 13 Warning CodesMS300
496
ID No.
Display on LCD Keypad
Warning Name
Description
31
Over-torque
(ot3)
Over-torque 3 warning
Action and Reset
Action Condition
Pr.14-75
Action Time
Pr.14-76
Warning Setting Parameter
Pr.14-74 Over-torque Detection Selection (Motor 3) = 1 or 3
0: No function
1: Continue operation after over-torque detection during constant speed
operation
2: Stop after over-torque detection during constant speed operation
3: Continue operation after over-torque detection during RUN
4: Stop after over-torque detection during RUN
Reset Method
When the output current < Pr.14-75, the Ot3 warning automatically clears
Reset Condition
When the output current < Pr.14-75, the Ot3 warning automatically clears
Record
N/A
Cause
Corrective Actions
Incorrect parameter setting
Configure the settings for Pr.14-75 and Pr.14-76 again.
Mechanical error (e.g. mechanical
lock due to over-torque)
Remove the causes of malfunction.
The load is too large
Decrease the loading.
Replace with a motor with larger capacity.
Accel. / Decel. time and working
cycle is too short
Increase the setting values for Pr.01-12–01-19 (accel./ decel. time)
V/F voltage is too high
Adjust the V/F curve (Motor 3, Pr.01-54–01-61), especially the setting value for
the mid-point voltage (if the mid-point voltage is set too small, the load capacity
decreases at low-speed).
The motor capacity is too small
Replace with a motor with larger capacity.
Overload during low-speed
operation
Decrease the loading during low-speed operation.
Increase the motor capacity.
The torque compensation is too
large
Adjust the torque compensation value (Pr.07-73 torque compensation gain)
until the output current decreases and the motor does not stall.
Improper parameter settings for
the speed tracking function
(including restart after momentary
power loss and restart after fault)
Correct the parameter settings for speed tracking.
Start the speed tracking function.
Adjust the maximum current for Pr.07-09 speed tracking.