Quattroflow QT 10, Инструкции по эксплуатации и монтажу

Страница: 27 / 28

27
TROUBLE SHOOTING
Operating troubles Cause/remedial action
Pump
does not
start
Pump
does
not
prime
Output is
not
obtained
Pressure
head is
not
obtained
Output is
not
consis ‐
tent
Pump
oper ‐
ates
noisy
Pump is
leaky
Motor
gets
too
warm
The 4 ‐ piston diaphragm pumps
operate very reliable and error ‐ free,
if they will be operated and serviced
in accordance with the instruction
manual.
1 X X
The screws of the pump chamber
maybe not tightened enough. Fix it!
2 X
Check the direction of flow showed
by the arrow on the pump, in case of
wrong way, turn the pump head.
3 X X X
Check suction pipeline and TC ‐ seals
for tightness.
4 X X X X
Check suction head ‐ increase suction
line cross section.
5 X X X Check viscosity of liquid pumped.
6 X
Check power supply and cables.
7 X X X
Avoid air inclusions in the liquid to
be pumped.
8 X X
Check pressure head ‐ open valve in
discharge line completely, remove
obstruction in discharge line.
9 X X
The diameters of the pipes in suction
or pressure line are too small.
10 X
Check the coupling halves. They
must be fixed with a lash.
11 X
Check longitudinal play of coupling
rod pins. The spider might be worn.
12 X X X
Check whether foreign bodies in
pump.
13 X X
Pump stopped by the thermal circuit
breaker. Allow the motor to cool
down – maybe reduce the power
consumption.
14 X X
Bearings are worn or defective and
must be replaced.
15 X
The valves are dry (e.g. not in use for
a long time), deformed or worn.
Change valve or wet the pump.
16 X
The diaphragm is burst ‐ replace.
17 X X X X
O–rings between valve plate and
pump housing are defective.
18 X
Align coupling accurately.
19 X X
The clamping ring screw got loose –
fix it.
20 X
Parameters of the control panel are
wrong – check basic settings.
21 X
Pump after SIP cooled down too fast
‐ slow cooling with room
temperature