SFA Sanipump VX 65 Serie Manual De Funcionamiento página 115

Table 25: Trouble-shooting
A B C D E Possible cause
- ✘ - - - Pump delivers against an excessively high pres-
sure.
- ✘ - - - Gate valve in the discharge line is not fully
open.
- - ✘ - ✘ Pump running in off-design conditions (part
load / overload)
✘ - - - - Pump and/or piping 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 pump rotor.
- ✘ ✘ ✘ ✘ Wear of internal parts
✘ ✘ - ✘ - Defective riser (pipe and sealing elements)
- ✘ - ✘ ✘ 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. Check the electrical installation.
✘
- - - Motor winding or power cable defective
✘ ✘
- - - - ✘ Defective rolling element bearing
- - - - Water level lowered too much during operation Check level control equipment.
✘
- - - - Temperature control device monitoring the
✘
winding has tripped the pump as a result of ex-
cessive winding temperatures.
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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 65/80
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 that the impeller can rotate freely.
Clean the impeller if necessary.
Replace worn parts by new ones.
Replace defective risers,
Fit new sealing elements.
Contact the manufacturer.
Contact the manufacturer.
Check the electrical connection of motor and
control system (if any).
Check the power cable.
Check the cable connections.
Check the voltage in the control cabinet.
Contact the energy supplier.
Replace by new original SFAparts or contact the
manufacturer.
Contact the manufacturer.
The motor will restart automatically once it has
cooled down.