7 Troubleshooting
No.
D
escri
pti
on
W
arning
Alarm
Tri
p Lo
ck
Erro
r
Ca
use of Pro
bl
em
2
Li
ve
ze
ro e
rror
X
X
Sig
nal
o
n
te
rmi
nal
53
o
r 6
0
is
le
ss
th
an 50
% o
f value
se
t i
n p
ar.
6-
10,
6-
12
and
6-2
2.
4
M
ains phase
loss
1)
X
X
X
Missing pha
se
o
n
supply side
, or
t
oo hi
gh vol
ta
ge imb
ala
nce.
Check supp
ly vol
ta
ge.
7
DC
ove
r volt
age
1)
X
X
Inte
rm
ed
ia
te
ci
rcuit voltage excee
ds l
im
it.
8
DC
under voltage
1)
X
X
Inte
rm
ed
ia
te
ci
rcuit voltage drop
s bel
ow “
vol
ta
ge w
arni
ng lo
w”
li
mit.
9
Inve
rte
r o
verl
oad
ed
X
X
More
th
an
100% l
oad
fo
r to
o l
ong.
10
M
otor
ETR
ove
r t
empera
ture
X
X
Mot
or is to
o ho
t due
to mo
re t
han
10
0% loa
d f
or to
o
lo
ng.
11
M
otor the
rm
istor ove
r
te
m
pera
ture
X
X
The
rmi
sto
r
or the
rm
istor conne
cti
on i
s disconne
cted.
12
To
rq
ue
limi
t
X
Torq
ue
e
xce
ed
s val
ue set in ei
ther par.
4-
16 o
r
4-
17.
13
Ove
r Curren
t
X
X
X
In
vert
er pea
k
curre
nt
limi
t is ex
cee
ded
.
14
Ea
rt
h f
aul
t
X
X
D
is
cha
rg
e f
rom
o
utp
ut
p
has
es
to
g
ro
und
.
16
Short
Ci
rcuit
X
X
Sh
ort-
ci
rcuit in mot
or o
r on
motor
te
rm
inals.
17
Contro
l word t
imeo
ut
X
X
No
comm
uni
ca
tio
n t
o f
reque
ncy conve
rter
.
25
Brake
resistor
short
-circuite
d
X
X
Bra
ke
resist
or is sho
rt-circuit
ed,
th
us
bra
ke function i
s di
scon
necte
d.
27
Brake
chopper
short-
ci
rcuited
X
X
Bra
ke
transistor
is
short-
ci
rcuited, t
hus brake
fu
ncti
on is
di
sconn
ecte
d.
28
Brake c
he
ck
X
Bra
ke
resi
st
or is no
t
conne
cted/wo
rki
ng
29
Pow
er boar
d over
t
emp
X
X
X
H
eat-
sink c
ut-
out tempe
ratu
re
ha
s
bee
n
rea
ch
ed.
30
M
otor pha
se U missing
X
X
Mot
or
ph
ase U is m
issing.
Ch
eck the
phase
.
31
Mo
tor ph
ase V
mi
ssing
X
X
Mot
or
ph
ase V is
mi
ssing
. Check th
e pha
se.
32
M
otor pha
se W missing
X
X
Mot
or
ph
ase W is
missing.
Che
ck the phase
.
38
Int
erna
l fault
X
X
Con
tact loca
l D
anfo
ss supplier.
47
Contro
l Voltage Fa
ul
t
X
X
X
24
V
DC ma
y be o
verl
oad
ed.
51
AM
T che
ck U
no
m
an
d I
no
m
X
W
rong sett
in
g for
moto
r
voltage and/or m
otor c
urrent
.
52
AM
T low
I
no
m
X
M
ot
or
c
ur
re
nt
is
too low
. Ch
ec
k set
tin
gs
.
59
Cu
rr
en
t lim
it
X
VL
T over
loa
d.
63
M
echan
ical
Bra
ke Low
X
Actua
l moto
r curre
nt has not ex
ceed
ed “rele
ase
bra
ke”
cu
rrent
within “sta
rt del
ay” time
wi
ndo
w
.
80
Dri
ve I
ni
tia
lise
d to Defaul
t
Va
lue
X
All
pa
ram
eter
sett
ings are
ini
tiali
ze
d t
o
def
ault
sett
ings
.
84
The c
onne
ct
ion
be
twe
en dri
ve
an
d LCP is l
ost
X
No
communi
ca
tio
n between
LCP
a
nd f
requ
ency conv
erte
r
85
Bu
tto
n disa
ble
d
X
Se
e para
mete
r
gro
up
0-
4*
LCP
86
Copy fa
il
X
An erro
r
occurre
d
whi
le copying from
fr
equ
ency c
onvert
er to
L
CP
or vi
ce
ve
rsa.
87
LC
P
da
ta
in
va
lid
X
Occu
rs
w
hen
co
py
in
g f
rom
LC
P
if th
e
LC
P c
on
tai
ns
e
rro
ne
ou
s d
ata
-
or i
f n
o d
ata w
as
upl
oa
de
d to
the
LCP.
88
LCP data
no
t
co
mpatible
X
Occurs whe
n copying fro
m
LC
P
if
data
are
m
oved
betwee
n frequency con
verte
rs with
maj
or diff
eren
ces in so
ftware
versions.
89
Para
mete
r re
ad
only
X
O
ccurs when
tr
ying
to wri
te t
o a
re
ad-
only para
mete
r.
90
Para
mete
r da
tabase
busy
X
LCP
an
d RS
485 co
nnection
are
trying
to
upda
te
para
mete
rs si
mul
tane
ously.
91
Par
am
et
er
va
lu
e
is n
ot
val
id
in
t
his m
od
e
X
O
cc
ur
s
w
hen
t
ryi
ng
t
o
w
rit
e
an
il
lega
l val
ue t
o a par
am
et
er
.
92
Para
meter
va
lu
e
exceeds the m
in/
ma
x li
mi
ts
X
Occurs when
trying
to se
t a
va
lue
ou
tsi
de t
he ra
nge.
nw run
N
ot
W
hile
RU
N
ni
ng
X
Pa
rame
ter ca
n
on
ly
be
chan
ged
wh
en the motor i
s stopp
ed.
Err.
A
wro
ng pa
ssword was e
nte
red
X
O
cc
urs
w
hen usin
g
a
w
rong passw
ord for c
han
ging
a passw
ord-
pro
tec
te
d par
amete
r.
1)
T
hese
fa
ults may be ca
used
by ma
ins di
storti
ons.
In
stal
ling
Da
nf
oss Li
ne
Fil
ter
ma
y re
ctify this p
ro
bl
em.
Tabl
e 7.
1:
Warni
ng
s and
Al
arms
Code list
VLT
®
Micro Drive FC 51 Operating Instructions
7 Troubleshooting
MG.02.A4.02 - VLT
®
is a registered Danfoss trademark
59
7