SFA Sanipump VX 50 Bedienungs- Und Installationsanleitung Seite 91

Table 16: Trouble-shooting
A B C D E Possible cause
- ✘ - - - Pump delivers against an excessively high
pressure.
- ✘ - - - Gate valve in the discharge line is not fully
open.
- - ✘ - ✘ Pump is running in the off-design range (part
load/overload).
✘ - - - - Pump or piping are not completely vented.
✘ - - - - Pump intake clogged by deposits
- ✘ - ✘ ✘ Supply line or impeller clogged
- - - ✘ Dirt/fibres in the clearance between the
✘
casing wall and impeller Sluggish rotor.
- ✘ ✘ ✘ ✘ Wear of internal components
- - Defective riser (pipe and sealing element)
✘ ✘ ✘
- - ✘ ✘ Impermissible air or gas content in the fluid
✘
handled
- - - - ✘ System-induced vibrations
- ✘ ✘ ✘ ✘ Wrong direction of rotation
- - ✘ - - Wrong supply voltage
✘ - - - - Motor is not running because of lack of
voltage.
✘ - ✘ - - Motor winding or connection cable are
defective.
- - - - ✘ Defective rolling element bearing
- ✘ - - - Water level lowered too much during
operation
✘ - - - - Temperature control device monitoring the
winding has tripped the pump as a result of
excessive winding temperatures.
8 Trouble-shooting
8 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷ For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by the
accessories manufacturer.
If problems occur that are not described in the following table, consultation with the
SFA service is required.
A Pump is running, but does not deliver
B Pump delivers insufficient flow rate
C Excessive current/power input
D Insufficient discharge head
E Vibrations and noise during pump operation
Sanipump VX 50
Remedy
Re-adjust to duty point.
Fully open the gate valve.
Check the pump's operating data.
Vent by lifting the pump off the duckfoot bend
and lowering it again.
Clean the intake, pump components and lift
check valve.
Remove deposits in the pump and/or piping.
Check whether the impeller can be easily
rotated.
Clean the impeller if required.
Replace worn components by new ones.
Replace defective riser pipes,
replace sealing elements.
Contact the manufacturer.
Contact the manufacturer.
Check the electrical connection of the motor
and the control system if any.
Check the mains power supply.
Check the cable connections.
Check the electrical installation.
Contact the energy supplier.
Replace by new original SFA parts or contact
the manufacturer.
Contact the manufacturer.
Check level control equipment.
The motor will restart automatically once it has
cooled down.
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