Dometic VacuFlush 5000 Series Operation Manual page 12

Maintenance/Winterizing/Service
Problem
6 . Lifting foot pedal does not add
water to the bowl .
7 . Water leaking from water valve .
8 . Water leaking from rear of
toilet bowl .
9 . Water is leaking from the base/
toilet connection .
10 . Vacuum pump running too
often between flushes .
11 . Vacuum pump will not
shut off .
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 .
12 . Vacuum pump will not run .
12
Possible Cause
a . Too much clearance between
pedal and top of water valve
cap .
a . Water valve body cracked due to
freeze damage .
b . Water line connection is loose or
not seated properly .
c . Defective water valve .
d . Stripped threads .
a . Loose check valve or hose
clamps .
b . Cracked or defective toilet bowl .
a . Clamp ring may be loose .
b . Ball seals may be worn or
defective .
a . Water leaks out of bowl
between flush ball and ball seal .
b . Vacuum line leak .
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 .
VacuFlush Pedal-Flush Toilet
Service Instruction
a . Replace foot pedal (most
models) or adjust cam strap
so clearance is .06 in . (1 .5 mm)
max (model 5006 only) .
a . Replace water valve .
b . Insure that threads are not
cross-threaded and tighten .
c . Replace water valve .
d . Replace water valve .
a . Secure check valve
connections .
b . Replace toilet bowl .
a . Remove pedestal cover (on
applicable models) and tighten
the clamp ring .
b . Replace ball seals .
a . Leave small amount of water
in bowl . If water is sucked from
bowl, see problems 1 and 2 .
b . Tighten all connections at toilet,
vacuum generator or vacuum
holding tank (including hose
clamps and threaded spin nuts) .
If leak persists, contact
Customer Service .
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 motor
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 .