SeaLand VHT 4500 Holding Tank - 140 Series VacuFlush Toilet - Manual (Page 15)

15
Problem Possible cause service instructions
TRoublEshooTinG (cont’d)
clEaRIng blockagE In ToIlET basE
1. Turn off water to the toilet.
2. Press pedal to open the flush ball.
3. Use a plunger to dislodge the foreign material from the 1-inch diameter orifice at the bottom of
the base, or use a small diameter blunt rod to attempt to push the blockage through the orifice.
4. Make sure vacuum action pulls material into discharge line before turning on water supply.
13. Vacuum pump is making a
loud noise.
14. Vacuum pump running too
slow, overheating, blowing
fuses or circuit breakers.
15. Difficulty in emptying waste
from holding tank.
16. Vacuum pump emits odor.
17. System emits odor.
a. Loose set screw in crank
assembly.
b. Pump bearing is worn.
c. Dirt or debris in pump body.
d. Worn or defective motor.
e. Motor loose from mounting
bracket.
a. Improper voltage.
b. Loose or broken electrical wiring.
c. Improper wire size.
d. Motor worn or defective.
e. Tank is overfilled – air pump forced
to pump water.
a. The toilet pedal is not locked open
during holding tank pump-out.
a. Worn, torn, or punctured pump
diaphragm.
a. Check for improper flexible hose.
a. Remove cover from pump and
check crank assembly setscrew
for tightness.
b. Check pump bearing for wear.
Replace if needed.
c. Disassemble air pump assem-
bly and inspect inside of pump
body for foreign objects.
d. Replace motor assembly.
e. Tighten the four (4) screws
securing the motor to the
mounting bracket.
a. Check input power for low
voltage.
b. Tighten or reconnect wires.
c. Wire size too small – check
electrical diagram for proper
wire size for voltage of pump
used.
d. Check motor and replace if
necessary.
e. Disassemble air pump and
empty out water.
a. Lock the toilet pedal open
(see “Holding Tank Pump-out
Operation”, page 10).
a. Replace pump diaphragm.
a. Replace hose where necessary.
ToilET MoDEl iDEnTiFicaTion
The model identification label is located on the
base of the toilet. It shows the model number and
serial number of the product. A similar label is also
located on the vacuum holding tank.
oRDERinG PaRTs
Dometic is ready to assist you in the event
service is required. Before calling, please have the
following information available:
1. Toilet model number.
2. Part number, description, color (if
applicable), and quantity. Refer to
separate parts list for details.