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13. TROUBLESHOOTING FLOWCHART
No
motor
rotates.
Is the
rated
voltage
applied
to main
circuit
terminals
Ll,
N or
Ll,
L2,
13?
Is
the
trip
display
appearing?
NO
When
power
is turned
ON,
does
the
backlight
of dis-
play
unit
light
up,
and
is
displayed?
YES
Is the display
content
on
the
display
unit
as
per
the
NO
monitor
mode?
(FM 000. OHz)
YES
Is the monitor mode F/R SW
"Ope.-key"?
NO
YES
Is F~SET-M
designated
by
NO
"Ope-key"?
NO
YES
Is
the
frequency
set
in
monitor
mode
"FS"?
YES
Are
Free-run
Stop
(FRS-L)
close
and
Reset
(RS-L)
open?
YES
Is
3-phase
balanced
voltage
applied
to inverter
output
terminals
U, V, W?
YES
Is voltage
applied
to the
motor
terminal?
YES
Motor
faulty
NO
Set
the voltage
across
©
-
to
10V DC.
Close
FRS-L
and
open
we
Inverter
failure
Circuit
breaker,
electromagnetic
contactor
and
thermal
relay faulty
or
inverter
tripped.
Refer
to "Troubleshooting
and Message
Contents"
in Table
10.
Isn't
the
circuit
between
control
circuit
terminals
RS-L
short-circuited?
INO
Inverter
internal
power
circuit
defective
Press
the
key to select
the
monitor
mode.
(FM _000. OHZ
* In
the
function
mode,
no motor
starts
operation.
Is either
PC board
ter-
Close
minal'
FW-L
or RV-L
NO
„either
closed?
one.
Is voltage
across
PC
board
terminals
@
-
®©
0 -
10V DC?
Inverter
so aitare |
Frequency
setting
device
failure
YES
Does
voltage
across
PC
board
terminals
©
-
®
change
at
0 - 10V
DC?
NO
Frequency
setting
device
faulty
or
|
signal
source
faulty
YES
Poor
wiring
between
inverter
and motor
- 96 -
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