12
VacuFlush Pedal-Flush ToiletMaintenance/Winterizing/Service
Problem Possible Cause Service Instruction
12. 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.
13. Vacuum pump is running too
slow, overheating, blowing fuses
or circuit breaker.
a. Gear motor is worn, defective.
b. Plugged vent line or vent lter.
c. Blockage in discharge line.
d. Improper wire size.
e. Improper voltage.
f. Vacuum pump bellows clogged
with tissue.
a. Check motor; replace if needed.
b. Disassemble and clean out vent
line. Replace vent lter if
necessary.
c. Disassemble and clean
discharge line. Be certain that in-
line valves (duckbill valves) and
seacock are in proper position.
d. Wire size too small. Check
electrical diagram for proper wire
size for voltage of pump.
e. Check input power for low
voltage.
f. Remove and clean bellows
assembly. (When ushing toilet,
using more water may alleviate
this problem.)
14. Toilet will not ush.
(No vacuum.)
See problem 15
if necessary.
a. Blockage exists in 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 ush ball, check 1-inch
(25 mm) orice at bottom of
base for blockage and dislodge
it. If blockage is not in base, it
may be found in:
• 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.
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