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YASKAWA VS-626MT Series - Trouble Shooting

YASKAWA VS-626MT Series
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Trouble
IIS
alarm
2
.
QL
alarm
3
.
OV
alarm
4
.
QC
alarm
5
.
FU
alarm
6
.
Motor
does
not
start
7
.
"Z-SPD"
doesn't
come
at
zero
speed
1
.
Check
the
resolver
wiring
The
figure
at
the
right
shows
the
wave
form
betweenterminals
13
and
14 (C)
2
.
I
Z
.
TROUBLESHOOTING
Check
Item
2
.
Check
the
starting
and
stopping
operation
frequency
1
.
Adjust
8RH(A)
if it
occures
duringdeceleration
2
.
Check
the
AC
Main
Supply
Voltage
Check
the
speed
referencefrom
N/C
(Terminal
33
(A)),
output
of
speed
AMP
(CH4(A))
and
speed
feed back
(CH
3(A))
Check
the
load to
see
if
it
exceeds
the
specifications
of
the
drive
unit
3
.
Check
the
Power
Transistors
and
wiringof
the
brakingcircuit
When
the
power
is
turned
on
immediately
after
it
has
been
turned
off
.
There
is a
chance
that
the
OV alarm
will
appear
so
wait
three
or fourminutes
before
turning
on
again
1
.
Check
the six
MainPowerTransistors
2
.
Check
the
output
circuit
(including
the
motor)
for
shorts
or
excessiveimpedance
to
ground
See
Item
4
Check
the
alarm
Leds if
there
are
any
alarms
indicated
refer
to
items
1
through
5
2
.
Check
the
speed
reference
from
N/C
(Terminal
33(A)),
the
output
of
speed
AMP
(CH4
(A))
and the
speed
feed
back
(CH3
(A))
3
.
Check
the
start
interlock
signal
(Terminal
37
(A)
should
be
12V)
4
.
Check
the
wiringof resolver
and
motor
1
.
Check
the
resolver
wiring
2
.
-Adjust
1RH(A)
and
/
or,6RH(C)
8
.
"Agree"
doesn'-t
1
.
Adjust
1RH(A)
and
/
or
6RH(C)
come
when
speed
is
correct
9
.
The
thermal
relay
'
1
.
Check
the
Power
Transistor
in
the
braking
circuit
in
the
braking
circuit
trips
2
.
Adjust
8RH
(A)
ringdeceleratio

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