- Clogged "re-circulation" pipe (Tab.1, part. 1),
Check through cleaning door (Tab. 1,
part. 2) with pump not working.
- Air passing through the mechanical seal. This can
be noticed thanks to water seepages from the
mechanical seal when the pump is not working.
Note: For any other cause, see "Fault tracing"
Vacuum pump (options)
No vacuum in the unit - possible causes
Air intake from the unit:
- Make sure that all unions are properly shut and
O-rings in perfect conditions.
Outlet valve (Tab.3, part.1) does not shut properly:
- Check if the seat is dirty (Tab.3, part.2) .
- Make sure that the seat and the valve itself are
not damaged. Should it be necessary, replace
them.
- The vacuum pump tank level is insufficient (top
up)
Vacuum pump does not run or runs slowly:
- The driving belt is broken (Tab.3, part. 3).Take off
the faulty links and install the belt again.
- The driving belt has loosened. Take off one more
links till you get the right state of tension once
again.
Vacuum pump blades are worn-out:
- Replace the 4 blades (Tab. 4, part.9).
3
How the pump works
Air
Water
1) Outlet valve
2) Valve seat
3) Driving belt
vacuum pump
self-priming centrifugal pump
float
intake
outlet
8
