Veichi AC80T Manual page 37

Dec
E.oU2 over-voltag
e
Constant
E.oU3 speedover-
voltage
Over-volta
E.oU4 ge while
stop
Acc
E.oC1 over-curren
t
Dec
E.oC2 over-curren
t
Constant
E.oC3 speedover-
current
Motor
E.oL1
over-load
AC80T Tower Crane Purpose VFD Manual
● Deceleration time is
too short.
● Load potential energy
or inertia is too large.
● Power voltage
fluctuation over limit.
● Power voltage
fluctuation over limit.
● Power voltage
fluctuation over limit.
● 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.
● Deceleration time is
too short.
● Load potential energy
or inertia is too large.
● Power voltage
fluctuation over limit.
● Sudden load change.
● Power grid voltage is
too low.
● 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.
36
● Prolong deceleration time
properly.
● Reduce load inertia or
improve inverter
capacitance or add
braking unit.
● Detect input power and
clear fault.
● Detect input power voltage
and eliminate fault.
● Install input reactor.
● Check input power,
eliminate fault.
● Seek support from factory.
● Prolong acc time.
● Restart motor until it totally
stops. Set F1.00 as 1or 2.
● Reset V/F curve or torque
boost value.
● Select inverter with right
capacitance.
● Prolong deceleration time.
● Connect external braking
resistance or braking unit.
● Select inverter with right
capacitance.
● Check load change and
eliminate it.
● Check input power,
eliminate fault.
● 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.