Chapter 14 Fault Codes and DescriptionsME300
14-13
Record When Pr.06-06=2 or 4, ot1 is a “Fault”, and the fault is recorded.
Cause Corrective Actions
Incorrect parameter setting Reset Pr.06-07 and 06-08.
Mechanical error (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 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 low, the load capacity
decreases at low speed).
Refer to the V/F curve selection of Pr.01-43.
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 (refer to Pr.07-26 torque compensation gain)
until the current reduces and the motor does no stall.
Improper parameter settings for
speed tracking function (including
restart after momentary power loss
and restart after fault)
Correct the parameter settings for speed tracking.
1. Start the speed tracking function.
2. Adjust the maximum current for Pr.07-09 speed tracking.
ID No. Display on LCM Keypad Fault Name Fault Descriptions
27
Over-torque 2
(ot2)
When output current exceeds the over-torque detection
level (Pr.06-10) and exceeds over-torque detection time
(Pr.06-11), and when Pr.06-09 is set to 2 or 4, the ot2
error displays.
Action and Reset
Action level Pr.06-10
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
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.
Reset condition Immediately reset
Record When Pr.06-09=2 or 4, ot2 is a “Fault”, and the fault is recorded.
Cause Corrective Actions
Incorrect parameter setting Reset Pr.06-10 and Pr.06-11.
Mechanical error (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 settings for Pr.01-35–01-42 (V/F curve), 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 (refer to Pr.07-26 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.
1. Start the speed tracking function.
2. Adjust the maximum current for Pr.07-09 speed tracking.
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