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User Manual of EM730/EM730E Series Inverter
302
E04
Steady-state
overcurrent
The same as E02
The same as E02
E05
Overvoltage
1.
The deceleration time is too
short, and the motor has too
much regenerated energy.
2.
The braking unit or braking
resistor forms an open circuit.
3.
The braking unit or braking
resistor does not match.
4. The power voltage is too high.
5. The energy consumption
braking function is not enabled
1.
Increase the deceleration time.
2.
Check the wiring of the braking
unit and braking resistor.
3.
Use a suitable braking unit/braking
resistor.
4.
Reduce the power voltage to the
specified range.
5.
For the model of the built-in
braking unit, set F15.30 to 1, and
enable the energy consumption
braking.
E06
Undervoltage
1.
The input power supply is
subject to phase loss.
2.
The terminals of the input
power supply are loose.
3.
The voltage of the input power
supply drops too much.
4.
The switch contacts of the
input power supply are aging.
1.
Check the input power supply and
wiring.
2.
Tighten the screws of input
terminals.
3.
Check the air circuit breaker and
contactor.
E07
Input phase loss
1.
The input power supply is
subject to phase loss.
2.
The input power supply
fluctuates greatly.
1.
Check the input power supply.
2.
Check the wiring of the input
power supply.
3.
Check whether the terminal is
loose
4.
Use a voltage regulator on the
input side.
E08
Output phase loss
1.
The output terminals U, V and
W have phase losses.
1.
Check the connection between the
inverter and motor.
2.
Check whether the output terminal
is loose.
3.
Check whether the motor winding
is disconnected.
E09
Inverter overload
1.
The acceleration and
deceleration time is too short.
2.
In the V/F drive mode, the V/F
curve setting is unreasonable.
3.
The load is too heavy.
4.
The braking time is too long,
the braking intensity is too
high, or DC braking is enabled
repeatedly.
1.
Increase the acceleration and
deceleration time.
2.
Reasonably set the V/F curve.
3.
Use the inverter that matches the
load.
4.
Reduce the braking time and
braking intensity. Do not enable
DC braking repeatedly.