Fault Diagnosis And Countermeasures 66
7 Fault Diagnosis And Countermeasures
7.1 Protection function and countermeasures
Fault Code Fault Description
Possible Reasons
Solutions
Fu.01
Over current occurs
in inverter
acceleration running
process
1. The acceleration time is
too short.
2. Start the rotating motor
directly.
3. The torque boost is preset
as too large.
4. The network voltage is
too low.
1. Extend acceleration time.
2. Restart the motor after stop
3. Reduce voltage of torque
boost.
4. Check the network voltage
and reduce power.
Fu.02
Over current occurs
in inverter
deceleration
running process
The acceleration time is too
short.
Increase the acceleration time
Fu.03
Over current occurs 1. Load changes suddenly
in inverter running 2. The network voltage is
or stop condition too low.
1. Reduce the load fluctuation.
2. Check the power voltage.
Fu.04
Overvoltage occurs
in inverter
acceleration
running process
1. The input voltage is too
high.
2. Put the power on and
off frequently.
1. Check the power.
2. Lower the setting of
acceleration torque level.
Fu.05
Overvoltage occurs 1. The acceleration time is
in inverter
too short.
deceleration 2. The input voltage is
running process
abnormal.
1. Extend the acceleration time.
2. Check the power voltage.
3. Install braking resistor or
reselect braking resistor.
Fu.06
Overvoltage occurs
in inverter running
process
1. The power voltage is
abnormal.
2. There is energy feedback
load.
1. Check the power voltage.
2. Install the braking unit and
braking resistor or reselect
braking resistor.
Fu.07
Overvoltage occurs
in inverter stop
condition
The power voltage is
abnormal.
Check the power voltage.
Fu.08
Under-voltage
occurs in inverter
running process
1. The power voltage is
abnormal.
2. There is starting operation
of heavy load in network.
1. Check the power voltage.
2. Supply power separately.
Fu.09
~Fu.11
Reserve
Fu.12
Inverter overload
1. The load is too large.
2. The acceleration time is
too short.
3.The torque boost is too
high.
4. The network voltage is
too low.
1. Reduce load or change a
larger capacity inverter.
2. Extend the acceleration time.
3. Reduce the voltage of
torque boost.
4. Check the network voltage.
Fu.13
Motor overload
1. The load is too large.
2. The acceleration time is
too short.
3. The protection factor
4. Setting is too small.
4. The torque boost is too
1. Reduce load.
2. Extend the acceleration time.
3. Increase the overload protection
factor of motor.
4. Reduce torque boost.
E550 Series Universal Low-Power Inverter
    "