NE200/300 Series Drive User Manual
Chapter 7 Fault information and trouble shooting
189
Trip
code
Trip Type
Possible causes Solutions
OH1
Heat-sink
over heat
1. Ambient
temperature too high
1. Lower the ambient
temperature.
2. Fan is damaged 2. Change the fan
3. Fan air duct is
blocked
3. Clear the air duct.
OL1
Motor
overload
1. Power supply
abnormal
1. Check the input power
source.
2. Motor rated current
set wrongly
2. Check whether the motor’s
rated current is correctly set
up.
3.The Curve of V/F is
not fit
3. Adjust the V/F curve and
torque boosting
performance.
4. Motor always
works with heavy
load at low speed.
4. Use specialized electric
motor.
5. Motor blocked to
stall or sudden large
load change
5. Check whether the motor
or the load is blocked to stall
or not.
6.Motor power too
low
6. Use motor and drive of
suitable power ratings
OL2
Drive
overload
1. Low voltage in
power grid
1. Check the input power
source.
2. Load too heavy 2. Select bigger capacity
drive.
3. Acceleration too
fast
3. Increase the acceleration
time
4.Restart the motor
still in turning
4. Avoid restarting when the
motor is in rotation.
EF0
Communic
ation fault
1. Baud rate and
parity checksum is
set incorrect
1. Check communication
parameters correct or not.
2. Communication
interrupted for long
time
2. Check the interface wiring.
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