Fault Diagnosis And Countermeasures 75
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 in inverter
running
or stop condition
1. Load changes suddenly
2. The network voltage is
too low.
1. Reduce the load
fluctuation.
2. Check the power voltage.
Fu.04
Overvoltage 1. The input voltage is too
occurs in inverter high.
acceleration 2. Put the power on and
running process off frequently.
1. Check the power.
2. Lower the setting of
acceleration torque level.
Fu.05
Overvoltage 1. The acceleration time is
occurs 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
1. The load is too large.
2. The acceleration time is
too short.
Inverter overload 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.
E500 Series Universal Low-Power Inverter
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