Maintenance; Malfunctions; Causes And Elimination; Warranty - Zehnder Pumpen ZPK 30 Manuel D'utilisation

5. Maintenance

Disconnect the power supply before carrying out any kind of work on the pump and
protect it against unauthorised reconnection!
Maintenance contains an inspection and a cleaning of the pump housing. For this purpose loosen the
four cross-head screws (pos. 24 of the sectional drawing), remove and clean the inlet filter (pos. 3) and
the base plate (pos. 4). Subsequently, reassemble all parts in the right order.
ATTENTION In case of a worn running wheel (e.g. due to abrasive media) a wear of the mechanical
seal is also possible. The inspection of the mechanical seal and the motor as well as the replacement
of the electric connecting cable should be effected by authorised after-sales services or by manufactur-
ing factory only.

6. Malfunctions; causes and elimination

- Disconnect the power supply before carrying out any kind of work on the ejection unit!
Failure
1. No motor rotation
2. Motor rotates but does not con-
vey
3. Discharge flow is too low
4. Discharge flow is too low

7. Warranty

As manufacturer, for all pumps of the type series ZPK we provide a warranty of 24 months from date of
purchase. Your sales receipt passes for verification. During that warranty period, we gratuitously reme-
dy all deficiencies which are attributed to material or fabrication defects by either repairing or replacing
the pump (to our choice).
Defects which are attributed to misuse or wear (running wheel and shaft seal) are excluded from war-
ranty.
Furthermore, the warranty claim expires if works (excepting those under point 5) are effected on the
pump. We will assume no responsibility for consequential damages that are caused by a breakdown of
the pump.
Cause
- Mains voltage missing or faulty
- Incorrect connection
- Defective current cable
- Running wheel is blocked
- Activated motor protection (over-
heating, blockage, voltage failure or
other defect)
- Floater got stuck
- Motor is defective
- Running wheel is blocked or worn
- Pressure pipe is blocked/hose is
bended
- Intake socket is blocked
- Pump is not properly bled (air bub-
ble inside of the housing)
- Too small dimension of the pressure
pipe
18
Removal
- Check power supply
- Correct the connection
- Replacement (after-sales-service)
- Cleaning
- Check, inform the
service
- Position the pump in such a way
that the floater can work freely
- Replacement (after-sales-service)
- Cleaning/Replacement
- Clean/remove kinks
- Clean
- Bleed the pressure pipe during
initial commissioning of the pipe, so
that water reaches the pump hous-
ing
- min. diameter 25 mm (1")
after-sales-