1.Vacuum pump running too often between flushes.

  a.Water leaks out of bowl between flush ball and ball seal.

  b.Vacuum line leak.

       a.Leave small amount of water in bowl. If water is sucked from bowl, see problems 1 in VF toilets troubleshooting.

       b.Tighten all connections at toilet, vacuum tank, vacuum pump, vacuum generator and or vacuum holding tank (including vacuum relief valves).Make sure each connectipon is doubled clamped. If leaks persists, contact Seacoast Services 877-645-2064 or EMail seacoastservices@gmail.com.

 2.Vacuum pump will not shut off.

  a.A vacuum leak exists.

  b.Insufficient vacuum .

  c.Faulty vacuum switch (pump creates more than 10 inches Hg).

  d.Improper wiring.

  e.Bellows not pumping.

       a.See problem 1 above.

       b.Isolate pump and use vacuum gauge to check vacuum levels. Could be a plugged discharge line or worn duckbill valves.

       c.Replace vacuum switch.

       d.Refer to wiring diagram to check for   proper wiring.

       e.Tighten set screw in eccentric to motor shaft. Otherwise, check for damage to bellows and motor shaft. Replace if necessary. 

 3.Vacuum pump will not run.

    a.No electrical power.

    b.Loose or broken electrical wiring.

    c.Improper electrical connections.

    d.Faulty vacuum switch.

    e.Faulty motor.

    f.Shut-down relay prevents pumping.

        a.Check input power, circuit breaker and fuse.

         b.Tighten or reconnect wires at vacuum pump and tank, vacuum generator, or vacuum holding tank.

         c.Make certain wires at vacuum switch are connected to the “B” terminals.

         d.To check vacuum switch, short across “B” terminals with jumper wire.

         e.Replace motor.

         f. Empty the holding tank.

 4.Vacuum pump is running too slow, overheating, blowing fuses or circuit breaker.

   a.There is a blockage in the system.

   b.Pump will not run.

   c.Duckbill valves in vacuum pump are inverted due to blocked discharge line or an attempt to pump out against closed seacock.

        a.Open flush ball and check the 1-inch (25mm) orifice at the bottom of the base for blockage and dislodge it. Never use drain-opening or other household plumbing chemicals.If blockage is not in base, it may be found in these locations:

• outlet of vacuum tank

• inlet of vacuum generator

• diptube of vacuum generator

• inlet of vacuum pump

       b.See problem 12.

       c.Replace duckbill valves, making sure they point in the correct direction.