Nidec NE200-4T0040G/0055PB - Chapter 7 Fault Information and Trouble Shooting; Fault Information and Solutions

NE200/300 Series Drive User Manual
Chapter 7 Fault information and trouble shooting 187
Chapter 7 Fault information and trouble shooting
7.1 Fault information and solutions.
Once a fault is detected, the NE200/300 series of frequency converter
would immediately block PWM output and enter the fault protection state;
meanwhile TRIP on the keypad would spark and the digital control area
display the fault code. At this point one must identify the cause of failure and
its corresponding solutions according to the method suggested in this
section, if it does not work, please contact us immediately. The series of
frequency converter has 22 kinds of faults, which is shown together with
their respective solutions in Table 7-1.
Note: A trip code with a sign ③ indicates this trip code is only for NE300
Table 7-1 fault diagnosis and its solutions
Trip
code
Trip Type Possible causes Solutions
Uu1
Bus Under
voltage
during
running
1.Power grid low
voltage
1. Check the input power
source.
OC1
Over
current in
Acceleratio
n
1. Acceleration time
too short
1. Increase the acceleration
time.
2. Power grid low
voltage
2. Check the input power
source.
3. Drive power rating
too small
3. Choose drive with higher
capacity.
OC2
Over
current in
Deceleratio
n
1. Deceleration time
too short
1. Increase the deceleration
time.
2. Large load inertia 2. Add suitable brake
devices.
3. Drive power rating
too small
3. Choose higher capacity
drive