Chapter 5: Fault Information And Troubleshooting - Veichi Electric AC70E-S2-R40G Manual

Chapter 5: Fault Information and Troubleshooting

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