
7-14
7.4 Troubleshooting Flowcharts
7.4.1 Quick troubleshooting of AC Drive
Drive F a u lt
V isu a lly ch e ck co n tro lle r
and D rive boards
*to n e xt p a g e
C heck burnt and
dam aged parts
C o n t a c t t e c h s u p p o r t
R e p lace fuse
C o n su lt w ith th e su p p lie r
C o n su lt w ith th e su p p lie r
C h e ck d isp la ye d fa u lt
m e ssa g e s
Replace the pre-charge
resistor
C heck term inals and
w irin g
C o n t a c t t e c h s u p p o r t
Perform detailed check
and contact tech support
Is fa u lt kn o w n ?
S ym p to m s o th e r th a n
b u rn t/d a m a g e d p a rts o r
fu se b lo w n in th e in ve rte r?
Any burnt or damaged parts?
M a in circu it in ta ct?
F a u lt sig n a l?
Is fu se O K
Is th e m a in circu it IG B T
O K ?
A n y visu a l
a b n o rm a litie s ?
A re d isp la ys a n d
in d ica to rs o f th e
o p e ra tin g u n it w o rkin g
n o rm a lly?
Is + 5V co n tro l vo lta g e
co rre ct?
Is th e D C in p u t vo lta g e
co n tro llin g th e p o w e r
co rre ct
A n y fa u lt d isp la yed?
W h a t’s th e m e ssa g e ?
Is L E D lit?
R eplace control board
a n d d ig ita l o p e ra tin g u n it
Is th e e rro r elim in a te d
a fte r re p la cin g co n tro l
b o a rd ?
Y E S
N O
N O
Y E S
N O
N O
N O
Y E S
Y E S
Y E S
Y E S
N O
N O
N O
Y E S
Y E S
Y E S
Y E S
N O
N O
Y E S
N O
Y E S
N O
Y E S
N O
Y E S
N O
A p p ly p o w e r