Quattroflow Installation, Operation & Troubleshooting Guide
Rev. 0
Page 23 of 25
www.quattroflow.com
8
TROUBLESHOOTING
Quattroflow pumps operate very reliable and error-free, if they will be operated and serviced in accordance
with the instruction manual. If there is still a problem the following table should help detecting and fixing the
cause by yourself.
Please read also the official and recent operating manuals and safety instructions carefully which are
available for Quattroflow Pumps and accessories.
If you would like to contact the manufacturer for support, please keep the serial number of the pump and
information about the process parameters available.
Operating troubles
Cause / remedial action
Pu
m
p
d
o
e
s n
o
t
star
t
Pu
m
p
d
o
e
s n
o
t
p
ri
m
e
Ou
tp
u
t
is n
o
t
o
b
taine
d
Pr
e
ssur
e
h
e
ad
is
n
o
t
o
b
taine
d
Ou
tp
u
t
is n
o
t
co
n
si
ste
n
t
Pu
m
p
o
p
e
rate
s
n
o
isy
/
vi
b
ration
s
Pu
m
p
is
leaky
M
o
to
r get
s t
o
w
ar
m
To
o
h
ig
h
p
u
lsati
o
n
D
iap
h
rag
m
d
am
ag
e
X
X
The front screws of the pump chamber / pressure plate are
not tightened enough. Fix it with the defined tightened
torque.
X
Check the direction of flow showed by the arrow on the pump,
in case of wrong way, turn the pump head.
X
X
X
Check suction pipeline and TC-seals for tightness.
X
X
X
X
Check suction head -> increase suction line cross section.
X
X
X
Check viscosity of liquid pumped.
X
Check power supply and cables.
X
X
X
X
Avoid air inclusions in the liquid to be pumped.
X
X
Check pressure head-open valve in discharge line completely,
remove obstruction in discharge line.
X
X
X
The diameters of the pipes in suction or pressure line are too
small -> risk for cavitation.
X
Check the coupling halves. They must be fixed with a lash ->
see Quattroflow manual.
X
Check longitudinal play of coupling rod pins. The spider made
of plastic might be worn.
X
X
X
Check whether foreign bodies in pump.
X
X
Pump stopped by the thermal circuit breaker. Allow the motor
to cool down – maybe reduce the power consumption.
Table 12 Troubleshooting Table 1
