43
TROUBLESHOOTING
-
Check
that
the
inverter
has
been
correctly
connected
to
the
power
line
(which
is
on)
-
Check
that
the
motor
pumps
have
been
correctly
connected
to
the
inverter
-
Check
that
all
the
cables
and
connections
are
operative.
PROBLEM
The
pump
is
not
feeded
Messaggio
Causa
intervento
none
Interruption
of
power
supply
Replace
the
power
supply
none
Burned
fuses
Substitute
the
fuses
none
Intervention
of
the
line
protections
Check
the
correct
protecttions
setting
INPUT
ERROR
(only
mod.
T/T)
‐
connections
LINE
and
MOTOR
were
reversed
Check
the
connections
LINE
and
MOTOR
and
connect
correctly
PROBLEM
The
current
circuit
breaker
has
tripped
to
protect
the
DGBOX
power
line
Messaggio
Causa
intervento
none
The
residual
current
circuit
breaker
is
inadequate
for
inverter
supply
Replace
the
residual
current
circuit
breaker
with
a
model
suitable
for
the
pulsating
components
and
in
direct
current
(class
A)
PROBLEM
The
pump
fails
to
start
Messaggio
Causa
intervento
OFF
The
pump
is
out
of
service
(placed
manually
out
of
service)
Put
the
pump
back
into
service
by
pushing
START
PROBLEM
The
pump
stopped
and
fails
to
re
‐
start
Messaggio
Causa
intervento
OVER
CURRENT
overcurrent
absorption
compared
to
set
value
(parameter
A
in
BASE
PARAMETER)
‐
check
the
correct
current
setting
‐
check
the
power
voltage
under
load
at
pump
terminals
(min
‐
15%)
‐
make
sure
the
motor
pump
is
turning
freely
and
is
not
braked
‐
check
the
correct
direction
of
rotation
‐
check
the
correct
sizing
of
the
wires
CURRENT
LIMIT
Serious
overcurrent
absorption
which
inverter
cannot
cope
with
Make
sure
the
motor
pump
is
not
blocked,
reduce
the
motor
acceleration
by
means
of
the
ACCELERATION
parameter.
DRY
RUNNING
(DRY
RUNNING
PF)
-
Lack
of
water
at
suction
-
pump
not
primed
-
suction
blocked
-
wrong
direction
of
motor
rotation
-
Check
correct
suction
conditions
-
prime
the
pump
-
check
the
suction
piping
-
check
the
correct
direction
of
motor
rotation
LOW
PRESS
The
system
does
not
reach
the
minimum
pressure
Check
that
there
are
no
broken
pipes.
LOW
VOLTAGE
Deviation
of
the
supply
voltage
higher
than
–15%
of
the
plate
voltage
Check
the
supply
voltage
and
the
section
and
length
of
the
inverter
power
cables
HIGH
VOLTAGE
Deviation
of
the
supply
voltage
higher
than
+15%
of
the
plate
voltage
Check
the
supply
voltage
OVER
TEMP
BOX
(solo
T/T)
internal
overheating
due
to
overload
or
excessive
ambient
temperature
Make
sure
the
air
cooling
channels
are
free
and
that
the
fans
are
working,
check
the
pump
load
OVER
TEMP
MODULE
Module
overheating
due
to
overload
check
the
pump
load
COM
ERROR
No
communication
between
control
board
and
power
board
Check
the
integrity
of
the
connection
cable
and
connections;
the
power
board
could
be
damaged
LOW
LEVEL
No
level
signal
with
level
signal
input
on
Make
sure
there
is
water
at
suction
or
check
level
signal
operation
EXT
OFF
Placing
out
of
service
by
means
of
external
signal
Check
the
external
signal
none
Pressure
sensor
fault
Check
the
display
pressure
with
a
reference
manometer,
re
‐
calibrate
or
substitute
the
pressure
sensor
