E.
O
C
1
Check if the output loop of the
inverter is grounding or short circuited
No
No
No
No
No
No
Whether the acceleration time is too short
Whether the decelerated time is too short
Whether the manual boost torque
or V/F curve is proper
Whether the voltage is too low
Whether the voltage is too low
Whether the rotating motor is started
Whether the load is added suddenly
during the acceleration
Perform troubleshooting
Adjust the manual boost
torque or V/F curve
Adjust the voltage
to normal range
Select start upon rotational
velocity follow-up or start
upon motor shutdown
Remove the
added load
Prolong the acceleration time
Yes
Yes
Yes
Yes
Yes
Yes
The inverter model
is rather small
Acceleration over current
Deceleration over current
E.
O
C
2
No
No
No
No
Install the brake unit
and brake resistor
Yes
Yes
Yes
Yes
Yes
Yes
Ask for technical support
Whether the brake unit and brake
resistor are installed
81
Check if the output loop of the
inverter is grounding or short circuited
Perform troubleshooting
Prolong the deceleration time
Adjust the voltage
to normal range
Remove the
added load
Whether the load is added suddenly
during the acceleration
Chapter 8 Troubleshooting and Countermeasures