Daewoo DDA80, User Manual

Page: 18 / 26

Problem Cause Remedy
P
ow
er
co
ns
um
pt
io
n
o
f
pu
mp
is
t
o
o
l
ar
ge
The impeller and flow guidance
are rubbing each other
．
Listen to the sound of the pump
carefully
． If there are rubbing
noises ， adjust the impeller until
the noise is gone ．
The impeller i s clogged with
weeds or foreign matter
．
Check and clean the pump.
No
f
lo
w
s
ud
d
e
nl
y
The connector of the inlet pipe
is loose or is leaking
．
Check the inlet pipeline and fix
accordingly
．
Suction head has been exceeded.
Check the suction head and lower
the position of the pump.
V
ib
ra
t
io
na
l
no
is
e
s
Suction head is too high and
causing cavitation
．
Check the suction head and lower
the position of the pump.
Large water output. Decrease the output of the water.
Inlet pipe is clogged with
foreign matter,so the resistance
is too large
．
Check the inlet pipe and filter net
and clean if necessary
．
Rotary part is loose.
Listen carefully and inspect the
part that causes the noise then
stop the machine and adjust as
necessary
．
Pump unit is loose or not
installed properly
．
Stop the machine and adjust the
pump and engine
．
Air inside the pump unit or air
inside the pipeline
．
Remove the air drain screw and
elim- inate the air
．
Impeller damaged
Stop the machine and replace the
impeller
．
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