11
TROUBLESHOOTING GUIDE
2. Flush ball will not close
completely.
3. Water does not shut off in
toilet (toilet overflows).
4. Water does not enter toilet
bowl properly.
5. Water leaking from water
valve. (See Service Tip on
page 8.)
6. Water leaking from rear of
toilet bowl.
(See Service Tip on page
8.)
7. Vacuum pump running too
much between flushes.
(See Vacuum Tester
information on page 7.)
8. Toilet will not flush.
(No vacuum.)
a. Clamp ring is overtightened,
causing too much tension on
seal and flush ball.
b. Weak or defective flush lever
return spring.
a. Dirt lodged in water valve seat.
b. Flush lever cam strap is bent
down, holding water valve open.
c. Worn or defective water valve.
d. Worn or defective flush lever
return spring.
a. Low water pressure.
b. Water valve clogged.
a. Loose connection.
b. Worn or defective water valve.
c. Water line connection not seated
properly.
a. Loose hose connection.
b. Loose vacuum breaker.
c. Defective vacuum breaker.
d. Cracked or defective toilet bowl.
a. Flush ball leaks.
b. Vacuum line leak.
c. Duckbill valves in pump not
sealing. (This problem occurs
gradually. The pump takes
longer periods of time to
shut off between flushes.)
d. Pump bellows worn or damaged.
a. Vacuum pump will not run.
b. Plugged vacuum line between
toilet and vacuum breaker.
c. Duckbill valves or vacuum pump
installed backwards.
d. Vacuum pump inlet or
outlet lines plugged.
e. Plugged vacuum tank or vacuum
generator.
a. Loosen clamp ring.
b. Check spring tension by letting
up on flush lever suddenly.
If lever does not snap back,
replace spring cartridge assembly.
a. Disassemble and clean water
valve.
b. Bend front of cam strap up about
1/16" (1.6mm). (Model 1606 only)
c. Replace water valve.
d. Replace spring cartridge.
a. Check incoming water pressure.
b. Remove and clean filter screen
inside water valve inlet.
a. Tighten bottom cap, inlet fitting
and outlet hose clamp.
b. Replace water valve.
c. Remove water line and
assemble correctly.
a. Tighten hose clamp.
b. Check breaker/bowl connection.
If loose, push breaker into bowl.
c. Replace vacuum breaker.
d. Replace toilet bowl.
a. Leave small amount of water in
toilet. If water is sucked from
bowl, see problems 1 and 2.
b. Check all piping connections
between toilet and vacuum tank.
c. Disassemble inlet and outlet
fittings on pump and inspect all
four duckbill valves. If valves
are not sealing, replace them.
d. Inspect bellows in pump for
small hole or rip.
Replace if necessary.
a. See problem 9.
b. Disconnect line and clear plug.
c. Make certain pump and duckbill
valves are installed correctly.
Replace valves if stuck open.
d. Disassemble and clean.
e. Unplug vacuum tank or vacuum
generator.
Problem
Possible Cause
Service Instructions
Summary of Contents for HTS-EC
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