TROUBLESHOOTING GUIDE
ProblemPossible CauseService Instructions
9. Vacuum pump will not run.a. No electrical power.a. Check input power, circuit
breaker.
b. ?Tank full? float switch is stuckb. Remove switch and clean or
replace.
c. Loose or broken electrical wiring.c. Tighten or reconnect wires at
vacuum pump, vacuum generator,
vacuum tank, status panel, ?tank
full? float switch relay.
d. Faulty vacuum switch.d. Replace vacuum switch.
e. Faulty motor.e. Replace motor.
10. Vacuum pump will nota. Excessive vacuum leak.a. See problem 7.
shut off.b. Faulty vacuum switch.b. Replace vacuum switch.
c. Duckbill valves in vacuum pumpc. Replace duckbill valves.
are defective.
d. Vacuum pump or vacuumd. Prime pump by charging system
generator needs primed.with water.
e. Improper wiring.e. Check wiring. Refer to wiring
diagram.
11. Vacuum pump running tooa. Low voltage.a. Check for low voltage.
slow, overheating, orb. Loose or corroded wiring.b. Tighten loose connections,
tripping circuit breaker.replace corroded wiring.
c. Wire size is too small.c. Replace with proper size wire.
d. Discharge line is blockedd. Disassemble and clean
between vacuum pump anddischarge line.
holding tank, causing high back
pressure.
e. Plugged or defective duckbill valvee. Disassemble pump and clean or
in vacuum pump.replace duckbill valves.
f. Plugged holding tank vent line.f. Disassemble and clean vent line.
g. Pump motor worn or defective.g. Check motor and replace if
necessary.
h. Pump bellows clogged withh. Remove and clean. Use more
tissue.water during flushing.
12. Vacuum pump emits odor.a. Loose or defective hosea. Tighten connections.
connections on pump.
b. Torn or punctured pumpb. Replace pump bellows.
bellows.
13. Blockage between toileta. Collapsed vacuum line.a. Inspect vacuum line for collapsed
and vacuum generator orcondition and replace line.
vacuum tank.b. Too many elbows or bends inb. Reconfigure vacuum line to
vacuum line.reduce number of elbows.
c. Improper operation of toilet.c. Make sure toilet is being
operated correctly.
d. Flushing foreign objects downd. DO NOT flush any non-
toilet.dissolving items (i.e. sanitary
napkins, facial tissue, wet
strength tissue, paper towels,
etc.) or excessive toilet tissue
down toilet. Rapid-dissolving
?
SeaLand toilet tissue is best.
12 |