Constant speed over current
E.
O
C
3
Check if the output loop of the
inverter is short circuited or has
leakage current
No
No
Whether the load is added suddenly
during the running
Whether the inverter load can be lightened
Perform troubleshooting ,
and install output reactor
if the cable is too long
Remove the added load
Lighten the load
Yes
Yes
Yes
The inverter model
is rather small
No
Acceleration over voltage
Deceleration over voltage
E.
O
U1
If the input voltage is too high
If there are external forces
driving the motor to run during the
acceleration process .
No
No
Adjust the voltage
to normal range
Remove the external forces
Yes
Yes
E.
O
U2
Whether the brake unit and resistor
are installed
Install the brake
unit and resistor
Whether the input voltage is too high
Whether there are external forces
driving the motor to run during the
deceleration process .
No
No
Whether the deceleration time is too short
Adjust the voltage
to normal range
Prolong the deceleration
time or install brake unit
and resistor
Remove the external
forces or install brake
unit and resistor
Yes
Yes
Yes
No
No
82
Ask for technical support
Ask for technical support
Chapter 8 Troubleshooting and Countermeasures