7-17
7.4.3 Overvoltage and Undervoltage Troubleshooting
T h e AC Drive d isp la ys O V, L V
T h e AC drive o u tp u t is O K
A re th e o u tp u t p h a se cu rre n ts
b a la n ce d ?
A n y a b n o rm a l va lu e ?
V o lta g e p re se n t a t
o u tp u t te rm in a ls ?
Is th e o u tp u t fre q u e n cy
d isp la ye d o n th e o p e ra to r?
Is F W D L E D o n o p e ra to r O N ?
Is th e m a in circu it fu se in ta ct
A n y visu a l d a m a g e ?
A n y a b n o rm a l in d ica tio n s?
Is th e AC drive o p e ra tio n O K
a fte r b o a rd re p la ce m e n t?
R e p la ce th e co n tro l
b o a rd
P e rfo rm d e ta ile d ch e ck a n d
co n tact tech support
Y E S
N O
Y E S
Y E S
Y E S
N O
N O
Y E S
N O
Y E S
Y E S
N O
N O
N O
Y E S
Y E S
N O
N O
C o n n e ct th e m o to r to ru n
In p u t fre q u e n cy co m m a n d s
In p u t o p e ra tio n co m m a n d
A p p ly p o w e r
C o n t a c t t e c h s u p p o r t
C o n t a c t t e c h s u p p o r t
C o n t a c t t e c h s u p p o r t
C o n t a c t t e c h s u p p o r t
R e p la ce th e co n tro l b o a rd