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10-21
10.4.3 Overvoltage and Undervoltage Troubleshooting
T h e in v e rte r d is p la y s O V , L V
T h e in v e rte r o u tp u t is O K
A re th e o u tp u t p h a s e c u rre n ts
b a la n c e d ?
A n y a b n o rm a l v a lu e ?
V o lta g e p re s e n t a t T 1 ,T 2 ,T 3
o u tp u t te rm in a ls ?
Is th e o u tp u t fre q u e n c y
d is p la y e 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 c irc u it fu s e in ta c t
?
A n y v is u a l d a m a g e ?
A n y a b n o rm a l in d ic a tio n s ?
Is th e in v e rte r o p e ra tio n O K
a fte r b o a rd re p la c e m e n t?
R e p la c e th e c o n tro l
b o a rd
P e rfo rm d e ta ile d c h e c k a n d
c o n s u lt w ith th e s u p p lie r
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 c t th e m o to r to ru n
In p u t fre q u e n c y c o m m a n d s
In p u t o p e ra tio n c o m m a n d
A p p ly p o w e r
C o n s u lt w ith th e s u p p lie r
C o n s u lt w ith th e s u p p lie r
C o n s u lt w ith th e s u p p lie r
C o n s u lt w ith th e s u p p lie r
R e p la c e th e c o n tro l b o a rd