Zehnder Pumpen UFB 200 Manuel D'utilisation page 23

The unit shall be inspected and cleaned at least twice a year. In case of highly polluted waste waters (e.g.
kitchen waste water containing fat) a more frequent inspection may be necessary. For this purpose, after
disconnecting the mains plug, the grid and/or the cover plate must be removed.
Now, the siphon insert with dirt trap may be completely removed.
In case of UFB ejection units, escaping water in the pump housing of the pump is
construction-conditioned (ventilation) – no defect!
In order to prevent malfunctions and blockages, this ventilation hole of the pump must be cleaned from
solids and contaminations. Especially in case of washing machines without lint filter, the ejection unit,
especially the ventilation hole and the inlet filter of the pump as well as the floater, must be cleaned in
shorter intervals. The interior of the tank must be cleaned using clear water.
- For troubleshooting and inspection of the motor or the electrical components, please contact your
specialist retailer.
Excepting in case of dysfunctions, a disassembly of the pump is not necessary.
After completion of the works, the siphon will be reinstalled (respect the correct position according to image 1!)
and the O-ring will be carefully pressed into the existing groove between siphon and tank. In case of a heavy
contamination or degradation, the O-ring must be replaced.
Finally, the grid/cover plate will be replaced and the mains plug will be plugged in.
For inspection, the unit should be inspected twice with clear water.
7. 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 convey
3. Motor runs in short intervals
4. Motor rotates with a high noise
Cause
- Mains voltage missing or faulty
- Running wheel is blocked
- Motor is overloaded
- Floating switch is defective
- Motor is defective
- Pressure pipe is blocked/Hose is
bended
- Pump ventilation in blocked
- Non-return valve in not correctly
installed
- Non-return valve is leaky
- Foreign object reached the device
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Removal
- Check power socket
- Connect mains switch
- Remove cover; remove possibly
existing foreign objects, in case of
reoccurrence, removal by
specialist.
- If the motor does not switch-on
after cooling, removal by specialist.
- Removal by specialist
- Removal by specialist
- Remove blockage and/or bends,
effect a test running.
- Clean the ventilation hole in the
pump housing
- Rotate, check the function
- Clean and/or replace the non-
return valve
- Removal by specialist