BEDU S Series, Руководство по эксплуатации и техническому обслуживанию

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7. FAULTS: CAUSES AND SOLUTIONS
Here below the most common causes of malfunctions in the operation of pumps are shortly
listed together with the possible solutions.
SO
LUTI
O
N
V
e
rif
y
e
le
c
tr
ic
a
l
c
o
n
n
e
c
tion
s
a
n
d
th
e
rmal
p
ro
te
c
ti
ons
V
e
rif
y
r
a
ting
a
n
d
t
y
p
e
o
f
(s
ta
r
-
de
l-
ta
)
mo
to
r
c
o
n
n
e
c
tion
R
e
d
u
c
e
t
h
e
inv
e
rt
e
r
s
ta
rt
r
a
mp
V
e
rif
y
t
h
a
t
s
h
a
ft
s
r
o
ta
te
f
re
e
ly
V
e
rif
y
t
h
a
t
th
e
p
u
mp
s
h
a
ft
r
o
ta
te
s
fr
e
e
ly
R
e
v
e
rs
e
e
le
c
tr
ic
mot
o
r
c
o
n
n
e
c
tion
s
Op
e
n
v
a
lv
e
s
D
is
a
s
s
e
mble
a
n
d
c
lea
n
t
h
e
f
ilt
e
r
D
ra
in
p
ip
e
s
.
R
e
mo
v
e
s
iph
o
n
s
.
Tigh
te
n
f
it
ting
s
a
n
d
f
lan
g
e
s
In
c
re
a
s
e
t
h
e
p
ipe
d
iame
te
r.
R
e-
mov
e
a
b
ru
p
t
v
a
riat
ion
s
o
f
s
e
c
tion
a
n
d
d
ire
c
tion
P
re
h
e
a
t
th
e
f
lu
id.
D
e
c
re
a
s
e
t
h
e
s
p
e
e
d
o
f
ro
ta
tion
.
S
ta
b
ili
z
e
t
h
e
mains
v
o
lt
a
g
e
S
ta
b
ili
z
e
t
h
e
e
le
c
tr
ic
c
ir
c
u
it
In
c
re
a
s
e
t
h
e
ine
rt
ia
o
f
th
e
h
y
d
ra
u-
lic
c
ir
c
u
it
D
ra
in
p
ipe
s
.
R
e
mo
v
e
s
iph
o
n
s
.
Tigh
te
n
f
it
ting
s
a
n
d
f
lan
g
e
s
In
c
re
a
s
e
t
h
e
v
a
lv
e
o
p
e
ra
ting
p
re
s-
s
u
re
R
e
p
lac
e
w
it
h
f
re
e
b
a
ll
fo
o
t
v
a
lv
e
CA
USE
The
mot
o
r
is
n
o
t
p
o
w
e
re
d
In
c
o
rr
e
c
t
s
u
p
p
ly
v
o
lt
a
g
e
E
x
c
e
s
s
iv
e
p
o
w
e
r
c
o
n
s
u
mpt
ion
Mec
h
a
n
ic
a
l
lo
c
k
o
f
mo
to
r
a
n
d
/o
r
p
u
mp
s
h
a
ft
s
Mag
n
e
ti
c
c
o
u
p
lin
g
d
e
ta
c
h
men
t
D
ire
c
tion
o
f
ro
ta
tion
r
e
v
e
rs
e
d
V
a
lv
e
s
o
n
s
u
c
tion
a
n
d
/o
r
d
is
c
h
a
rg
e
p
ipe
s
c
lo
s
e
d
S
u
c
tion
f
ilt
e
r
c
log
g
e
d
P
re
s
e
n
c
e
o
f
a
ir i
n
t
h
e
s
u
c
tion
p
ipe
H
igh
p
re
s
s
u
re
los
s
e
s
in
t
h
e
s
u
c
tio
n
li
n
e
Fluid t
o
o
v
is
c
o
us
Ov
e
rv
o
lt
a
g
e
a
n
d
/o
r
o
v
e
rc
u
rr
e
n
t
Fee
d
b
a
c
k
e
lec
tr
ic
c
irc
u
it
t
o
o
s
e
n
s
it
iv
e
Fee
d
b
a
c
k
h
y
d
ra
u
lic
c
ir
c
u
it
t
o
o
s
e
n
s
it
iv
e
P
re
s
e
n
c
e
o
f
a
ir i
n
p
ipe
s
In
te
rmi
tt
e
n
t
o
p
e
n
ing
o
f
th
e
r
e
lie
f
v
a
lv
e
Foo
t
v
a
lv
e
n
o
t
w
o
rk
ing
p
ro
p
e
rl
y
o
r
o
f
th
e
t
y
p
e
w
it
h
p
la
te
a
n
d
s
p
ring
O
RIG
IN
E
lec
tr
ic
a
l
E
lec
tr
ic
a
l
E
lec
tr
ic
a
l
Mec
h
a
n
ic
a
l
Mec
h
a
n
ic
a
l
E
lec
tr
ic
a
l
H
y
d
ra
u
lic
H
y
d
ra
u
lic
H
y
d
ra
u
lic
H
y
d
ra
u
lic
H
y
d
ra
u
lic
E
lec
tr
ic
a
l
E
lec
tr
ic
a
l
H
y
d
ra
u
lic
H
y
d
ra
u
lic
H
y
d
ra
u
lic
H
y
d
ra
u
lic
FAULT
The
p
u
mp
d
o
e
s
n
o
t
s
ta
rt
The
p
u
mp
d
o
e
s
n
o
t
s
u
c
k
li
q
u
id
a
t
s
ta
rt
u
p
P
re
s
s
u
re
a
n
d
/o
r
flow
ra
te
p
u
ls
e
s
in
th
e
d
is
c
h
a
rg
e
li
n
e
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