AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL BASIC OPERATION AND TRIAL RUN
51
E.oU3
Constant
speedover-
voltage
●
Power voltage fluctuation
over limit.
●
Detect input power voltage and
eliminate fault.
●
Install input reactor.
E.oU4
Over-voltage
while stop
●
Power voltage fluctuation
over limit.
●
Check input power, eliminate
fault.
●
Seek support from factory.
E.oC1
Acc
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 1or 2.
●
Reset V/F curve or torque
boost value.
●
Select inverter with right
capacitance.
E.oC2
Dec
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
speedover-cu
rrent
●
Sudden load change.
●
Power grid voltage is too
low.
●
Check load change and
eliminate it.
●
Check input power, eliminate
fault.
E.oL1
Motor
over-load
●
V/F curve setting is not
suitable.Or torque boost
too high.
●
Power grid voltage is too
low.
●
Unright overload
protection setting.
●
Locked-rotor run or too
heavy load.
●
Universal motor long time
low speed run.
●
Reset V/F curve or torque
boost value.
●
Check input power, eliminate
fault.
●
Unreasonable F5.06 setting.
●
Adjust load or select inverter
with right capacitance.
●
If need long low-speed
operation, please choose
special motor for inverter.
E.oL2
Inverter
over-load
●
Load is too heavy.
●
Acceleration time is too
short.
●
Start running motor.
●
V/F curve setting is not
suitable.Or torque boost
too high.
●
Select inverter with right
capacitance.
●
Prolong acceleration time
●
Restart motor util it totally stop.
Set F1.00 as 1or2.
●
Reset V/F curve or torque
boost value.
E. SC
System
abnormality
●
Acceleration time is too
short.
●
Short circuit between
●
Prolong acceleration time
properly.
●
Check periphery equipments
