Delta MH300 Series - Page 668

Chapter 13 Warning Codes|MH300
13-19
ID No. Display Warning Name Description
20 Over-torque 1 (ot1) Over-torque 1 warning
Action and Reset
Action condition Pr.06-07
Action time Pr.06-08
Warning treatment parameter
Pr.06-06=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 input current < (Pr.06-07 – 5%), the o
t1 warning automatically
clears.
Reset condition
When input current < (Pr.06-07 – 5%), the o
t1 warning automatically
clears.
Record N/A
Cause Corrective Actions
Incorrect parameter setting Configure the settings for Pr.06-07 and 06-08 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 settings for Pr.01-01–01-
08 (V/F curve), 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.
Over-load during low-speed
operation.
Decrease the loading during low-speed operation.
Increase the motor capacity.
The torque compensation is too
large.
Readjust the torque compensation value (Pr.07-
26 torque compensation
gain) till 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.