Operating Instructions

Fault Codes
Digital Keypad
321 | 443
Action time
Pr.06-11
Fault treatment parameter
Pr.06-09
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
Reset condition
Auto
When Pr.06-09=1 or 3, ot2 is a “Warning”. The warning is automatically cleared when
the output current < (Pr.06-10 – 5%).
Manual
When Pr.06-09=2 or 4, ot2 is a “Fault”. You must reset manually.
Record
Immediately reset
Active level
When Pr.06-09=2 or 4, ot2 is a “Fault”, and the fault is recorded.
Cause
Corrective Actions
Incorrect parameter setting
Configure the settings for Pr.06-10 and Pr.06-11 again.
Mechanical failure (e.g. over-torque,
mechanical lock)
Remove the causes of malfunction.
The load is too large.
● Reduce the load.
● Replace the motor with a larger capacity model.
Accel./Decel. time and working cycle are
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 2, Pr.01-35–01-42), especially the setting value for the mid-point
voltage (if the mid-point voltage is set too low, the load capacity decreases at low speed).
The motor capacity is too small
Replace the motor with a larger capacity model.
Overload during low-speed operation
● Decrease low-speed operation time.
● Increase the motor capacity.
Torque compensation is too large
Adjust the torque compensation (See Pr.07-71 torque compensation gain) until the current
reduces and the motor does no stall.
Improper parameter settings for speed
tracking function (including restart at
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.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
28
Under current (uC)
Low current detection
Action and Reset
Action level
Pr.06-71
Action time
Pr.06-72
Fault treatment parameter
Pr.06-73
0: No function
1: Fault and coast to stop
2: Fault and ramp to stop by the 2
nd
deceleration time
3: Warn and continue operation
Reset method
Auto
When Pr.06-73=3, uC is a “Warning”. The warning is automatically cleared when the
output current > (Pr.06-71+0.1A).