Veichi AC80T Manual page 42

Over voltage diagnoses process
Reduce power voltage
into fixed range
Clear short circuit
Stop motor and restart.
Or DC braking,then
start(F1.00:1). Or speed
track start(F1.00:2)
Maybe inverter fault or
misact.Plese seek for
technic support
Reduce
ACC over
DCC over
voltage(OU1)
voltage(OU2)
no
Fower votage in fixed range or not
yes
yes
yes
Phase or earth short cirsuit bwteen U/V/W and motor
no
no
yes
Whether it stops while restart the motor
no
no
Whether act while load suddently changes to"0"
no
no
no
Whether DC circuit voltage of main loop is above protection value while act
yes
yes
no
Whether act while
suddently stop ACC
yes
no
ACC time can be
prolong or not
no
yes
Load intertia can be reduced or not
no no
Whether used braking unit or DC braking function
yes
yes
Please check braking unit and seek for technic support
AC80T Tower Crane Purpose VFD Manual
Constant speed
over voltage(OU3)
yes
no
no
no
yes
Can prolong DCC time or not
no
no
yes
41
Stop state over
voltage(OU4)
yes
yes
yes
prolong
Use braking unit or DC
braking function