31
Chapter 5: Fault Information and Troubleshooting
Keyboard
display
Fault
code
Fault type
Possible causes
Treatment
L.U.1
Too low voltae
while stop
●
Power supply is too low
●
Voltage detection circuit is
abnormal
●
Check input power,clear fault.
●
Seek support from factory.
E.LU2
Too low
voltage in run
●
Power supply is too low
●
Power capacitance is too
small, or there is big impact
current in the power grid.
●
Inner DC main contactor is not
connect well
●
Check input power,clear fault.
●
Improve power supply.
●
Seek support from factory.
E.oU1
Accel.
over-voltage
●
Power voltage fluctuation over
limit.
●
Start when motor is running .
●
Detect power voltage and
clear fault.
●
Restart motor until it
completely stop.Set F1.00 as
1or2.
E.oU2
Decel.
over-voltage
●
Deceleration time is too short.
●
Load potential energy or
inertia is too large.
●
Power voltage fluctuation over
limit.
●
Prolong Deceleration time.
●
Reduce load inertia or
improve inverter capacitance or
add braking unit.
●
Detect power voltage and
clear fault.
E.oU3
Constant
speedover-volt
age
●
Power voltage fluctuation over
limit.
●
Detect power voltage and
clear fault.
●
Install input reactor.
E.oU4
Over-voltage
while stop
●
Power voltage fluctuation over
limit.
●
Check input power,clear fault.
●
Seek support from factory.
E.oC1
Accel.
over-current
●
Acceleration time is too short.
●
Start running motor.
●
V/F curve setting is not
suitable.Or torque boost too high.
●
Inverter capacitance is too
small.
●
Prolong acc time.
●
Restart motor until it totally
stop.Set F1.00 as 1or2.
●
Reset V/F curve or torque
boost value.
●
Select inverter with right
capacitance.
E.oC2
Decel.
over-current
●
Deceleration time is too short.
●
Load potential energy or
inertia is too large.
●
Power voltage fluctuation over
limit.
●
Prolong Deceleration time.
●
Connect external braking
resistance or braking unit.
●
Select inverter with right
capacitance.
E.oC3
Constant
●
Sudden load change.
●
Check load change and clear
