Sera ABP-100, Руководство по эксплуатации, Страница: 27 / 62

Air driven diaphragm pump
Pompe pneumatique à membrane
Operating instructions
Notice de mise en service
TA 312 Rev. 21 en 08/2018
Subject to technical modifications!
www.sera-web.com
27
E
N
Fault Possible cause Remedy
Pump will not start
Compressed air supply out of commission
Check compressed air supply, shut-off fittings
and connections.
Insufficient control air pressure Set pressure on the corresponding controller
Insufficient control air flow
Check whether the tubes (hoses) and
accessories have the proper nominal sizes
Filter pressure controller (control air supply) damaged Inspect, replace as needed.
Pump inlet or output closed
Loosen the suction and control line and check
whether the pump starts.
Control valve damaged
Replace control valve; check whether there is
icing on the air outlet (noise absorber), if yes:
remove
Viscosity of medium too high Cannot be remedied
Compressed air line blocked Check and clean
Suction line blocked Check and clean
Diaphragm(s) broken
Check whether air exits the pump on the
pressure side; if yes: replace diaphragms.
Pump runs, but no feeding
action
Valve balls are not closing Clean valve balls and seats, replace as needed.
Suction pressure too high Reduce suction pressure.
Suction line blocked Check and clean.
Viscosity of the medium too high
Install lines with a larger nominal size, especially
on the suction side. Reduce pump speed (stroke
number).
Pump does not run evenly
Pump control valve damaged or defective Replace control valve.
Ice on the air outlet (noise absorber) Dry and filter the control air.
No control air flow
Check compressed air supply accessories, in
particular any quick-connects
Pump stops
Suction line blocked while running Clean suction line and/or provide a suitable filter.
Control air contaminated with condensed water or oil
Check control air line and clean as needed. Use
only dry, oil- and solid particle-free air. Clean
control valve and replace as needed
Insufficient control air flow or pressure
Check control air pressure using a manometer
installed on the pump. If the pressure at this
point is lower with respect to the supply
pressure, check all control air connections.
Check all control air components for proper
dimensioning. Check control air lines for proper
sealing.
Filter pressure controller defective Replace filter pressure controller.
Pump not at the capacity
indicated in the table
(characteristic curve)
Suction line is not properly connected or sealed
Suction line is not correctly installed. Check and
correct as needed.
Lines plugged Check and clean.
Viscosity of the medium too high
Install larger lines, especially on the suction side.
Reduce the pump speed (stroke number).
Valve balls do not close Clean valve balls and seats, replace as needed.
Insufficient control air flow
Check control air pressure using a manometer
installed on the pump. If the pressure at this
point is lower with respect to the supply
pressure, check all control air connections.
Check all control air components for proper
dimensioning. Check control air lines for proper
sealing.
Suction and/or pressure line too long with insufficient
line cross-section
Install pulsation dampers.
Pressure side: Series MPD-...
Suction side: on request.