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Troubleshooting
Cause
Remedy
The
installation
is
not receiving
voltage.
Check
that:
.
The
main
power
switch
is
on.
.
There
is
c0ntrol voltage io
the start
equipment.
.
The
fuses are
intad.
o
There
is
voltage
in
all
phases
ofthe
supply line.
.
Allfuses
have power and that they
are
securely fastened to the fuse
holders.
.
Theoverload protection
is
nottripped.
.
The
motor
cable
is
oot damaged.
The
impeller
is
stuck.
Clean:
.
The
impeller
.
The
sump in
orderto
preventthe
impellerfrom tlogging
again.
Always
state
the serial
number
of
your
product,
see
Product Descriprion
(page
1
1).
The
pump does not stop when
a level sensor is used
DANGER:
Crush
Hazard
Moving
parts
can entangle or
crush.
Always disconnect and lock out
power before
servicing
to
prevent unexpected startup.
Failure
to do
so
could result
in
death or serious
injury.
Cause
Remedy
lhe
pump
is
flnabJe to
emptythe
sump
to
the
stop level.
Checkthat:
.
There
are no
leaks
from the piping and/ordischarge connertion.
.
lhe impelleris notclogged.
o
the
non.return valve(s)are functioning properly,
.
Ihe
pump
has
adequate capacity.
For
in{ormation;
Contact
the
local sales and service representative.
There
is a
malfunction
in
the
level-
sensing
equipment.
.
Clean
the
level
regulators.
.
Checkthe functi0ning
ofthe
level regulators.
.
Chetk
the
c0ntactor and
the
c0ntrol
cirruit.
.
Replace
all
defective items.
Ihe
stop
level
is
settoo
low.
Raise
the stop level.
Always
state
the serial
numberof your product,
see
Product Description
(page
'l
1).
The
pump
starts-stops-starts in rapid sequence
Cause
Remedy
lhe
pump
starts due
to
back.flow
whi(h fills
the
sump
to
the
start
level
agarn.
Checkthat:
.
The
distance between
lhe
start and stop levels
is
suflicient.
.
The
non-return valve(s)work(s) properly.
.
Ihe
length
ofthe
discharge
pipe
between
the pump
and
the {irst
non-
return
valve
is
sufficiently
short.
The
self"holding {unction
of
the
contactor
malf
unctions.
Check:
.
The
contador (onnections.
.
The
v0ltage in
the
r0ntrol rir(uit
in relation
to
the
rated voltages on
the
coil.
.
The
lunctloning 0fthe
stop-levelregulator.
.
Whether
the
voltage dr0p
in
the line
at
the starting
surge tauses
the
(ontactor's self-hold'ng malfunction.
60
Flygl
31
7
1
lnsta
llation,
Operation,
and IVaintenance
lvlanual
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