User manual

10
Problem Possible Cause Service Instructions
TROUBLESHOOTING GUIDE (cont’d)
11. Vacuum pump will not
shut off.
12. Vacuum pump will not run.
13. Vacuum pump is running too
slow, overheating, blowing
fuses or circuit breaker.
14. Toilet will not flush.
(No vacuum.)
See problem 15
if necessary.
a. A vacuum leak exists.
b. Insufficient vacuum (pump
creates less than 10 inches
Hg).
c. Faulty vacuum switch (pump
creates more than 10 in. Hg).
d. Improper vacuum generator
wiring.
e. Bellows not pumping.
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. Gear motor is worn, defective.
b. Plugged vent line or vent filter.
c. Blockage in discharge line.
d. Improper wire size.
e. Improper voltage.
f. Vacuum pump bellows clogged
with tissue.
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. See problem 9b.
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 if needed. Check
for damage to bellows and mo-
tor shaft. Replace if necessary.
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.
a. Check motor; replace if needed
b. Disassemble and clean out
vent line. Replace vent filter if
necessary.
c. Disassemble and clean dis-
charge 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 flushing toilet,
using more water may alleviate
this problem.)
a. Open flush ball, check 1-inch
(25mm) orifice 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.
PUMP SERVICE WARNINGS
WARNING –
ELECTRICAL SYSTEM
Turn off power before
servicing when power
isn’t required for test.
WARNING –
MOTOR STARTS
AUTOMATICALLY
Turn off power before
servicing.