10
Chapter 9
VACUFLUSH HEAD DIAGNOSTIC CHART CON’T.
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Pump will not run. No power. Check input power, breaker and fuse.
Loose or broken electric wire. Check wires at pump, vac. generator,
vacuum switch (B terminal conn).
Faulty vacuum switch. Short across B terminals w/ jumper.
Faulty motor. Replace motor.
Pump will not shut off. Insufficient vacuum. Check for 10 inches of vacuum.
Excessive vacuum leak. See pump running between flushes.
Faulty vacuum switch. Check by removing one of B wires.
Pump running too slow, Improper voltage. Check input voltage.
overheating, or blowing
breaker. Loose or broken wire. Find & replace wire.
Discharge line blocked causing Check lines/seacock. Clean discharge
back pressure. line.
Plugged or defective duckbill valve. Clean duckbill valve or replace parts.
Pump emits odor. Loose or defective hose connection Tighten connections or replace hose.
on pump.
Loose intake or discharge fittings Tighten all fittings on pump or replace
on pump. all nipples & adapters if necessary.
Worn, torn or punctured pump Replace pump bellows or diaphragm.
bellows or diaphragm.
Blockage between toilet and Collapsed or kinked vacuum line. Inspect & repair vacuum lines.
vacuum generator.
Flushing foreign objects down Do not flush non-dissolving objects
toilet. or excessive tissue down toilet.
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