Xylem FLYGT 3171 - Page 63

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