Chapter 6 Troubleshooting
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VFD-L-I Series
6-2
Revision July 2009, SW V1.1
6.2 Over Voltage (OV)
Ov er v oltage
Yes
N o
Yes
N o
N o
N o
Is volt age w ithi n
specif ic ation
R educ e voltage to
be within s pec.
H as ov er-v ol tage occurr ed w ithout load
Maybe AC motor driv e
has malfunc tion or
misoper ation due to
noise. P leas e contact
D ELTA.
Yes
Yes
Yes
Yes
Yes
Yes
N o
N o
N o
N o
N o
When OV oc curs , check if the
volt age of D C BUS is greater
than protection v alue
D ose O V oc cur when
sudden acc eleration
stops
I ncrease
deceleration
t ime
Increase setting time
Increase
acceler ati on
time
R educ e moment
of iner tia
R educ e moment of l oad inertia
U se br aking unit or D C br aking
N eed to chec k c ontr ol method. Please contac t D ELTA.
N eed t o cons ider us ing
braki ng unit or
DC brak ing
Summary of Contents for VFD-L-I Series
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