SeaLand VHT 4500 Holding Tank - 140 Series VacuFlush Toilet - Manual (Page 14)

14
Problem Possible cause service instructions
TRoublEshooTinG (cont’d)
7. Water leaking from rear of
toilet bowl.
8. Water is leaking from the
base/toilet connection.
9. Vacuum pump running too
much between flushes.
10. Toilet will not flush.
(No vacuum.)
11. Vacuum pump will not run.
12. Vacuum pump will not
shut off.
a. Worn or defective vacuum breaker.
b. Loose vacuum breaker.
c. Cracked or defective toilet bowl.
a. Clamp ring may be loose.
b. Ball seals may be worn or
defective.
a. Flush ball in toilet leaks.
b. Vacuum line leak.
c. Foreign material has fouled air
pump valves.
d. Pump diaphragm worn or
damaged.
e. Duckbill valve in discharge fitting
stuck open.
a. Vacuum pump will not run.
b. Plugged vacuum discharge line.
c. Plugged vacuum pump valve.
d. Vacuum pump discharge or
intake lines plugged.
a. No power.
b. Loose or broken electrical
wiring.
c. Improper electrical
connections.
d. Faulty vacuum switch.
e. Faulty motor.
a. Insufficient vacuum.
b. Excessive vacuum leak.
c. Faulty vacuum switch.
d. Improper wiring.
a. Remove vacuum breaker cover
and look into top of vacuum
breaker. Flush toilet. If water
leaks during flush, vacuum
breaker needs to be replaced.
b. Secure vacuum breaker
connection.
c. Replace toilet bowl.
a. Tighten the clamp ring.
b. Replace ball seals.
a. Leave small amount of water in
toilet. If water drains from bowl,
see problems 1 - 2.
b. Tighten all hose connections
at pump, vacuum tank, holding
tank, and toilet.
c. Disassemble air pump and
inspect under the two flat disk
valves. If foreign material is
present, remove it and reas-
semble pump.
d. Inspect diaphragm in pump for
small hole or rip. Replace if
necessary.
e. Disassemble discharge outlet
and inspect duckbill valve.
Clean or repair if necessary.
a. See problem 11.
b. Blockage usually at base of toi-
let below flush ball. Disconnect
line and clear.
c. Inspect and clean pump valves.
Replace if needed.
d. Disassemble lines and clean.
a. Check input power, circuit
breaker and fuse.
b. Tighten or reconnect wires at
pump and vacuum 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.
a. Verify pump pulls minimum 10
in. Hg of vacuum.
b. See problem 9.
c. To check switch, remove one
“B” terminal wire.
d. Check wiring. Refer to Wiring
Diagram (page 8).