Dometic SeaLand 8812 - Manual (Page 15)

5
Problem Possible Cause Service instructions
TROubLEShOOTing guiDE
1. Flush cycle operates correctly
but water in the bowl empties
slowly or not at all.
2. Macerator pump makes
unusually loud noise or
continually trips breaker.
3. Flush cycle is not activated
after pushing on flush button.
4. Insufficient or no water enters
the bowl.
5. Fresh water demand pump
turns on and off repeatedly
during toilet operation.
a. Discharge piping is pinched or
kinked.
b. Discharge piping is too high.
(Remember, all upward vertical
loops and should not exceed a
total of 9.8 feet (3 m) in height.)
c. The macerator pump or
discharge piping is blocked.
a. Foreign material in pump
chamber.
a. Holding tank is full and signal
from tank has shut down
electrical power to toilet.
b. Electrical power to toilet is shut
off or disrupted.
c. Flush Control Touchpad is
malfunctioning.
d. Circuit board in Electronic Control
Module is malfunctioning.
a. Water supply line is pinched or
kinked.
b. Screen in water valve is blocked.
c. Intake water filters are blocked
(in raw water system).
d. Water valve is malfunctioning.
a. Pump cut-out pressure is too low
(25 PSI or less).
b. Pump GPM output exceeds water
valve input.
c. Water valve screen is blocked.
d. Water valve is malfunctioning.
a. Check discharge piping.
b. Reroute discharge piping.
c. Close seacocks and clear
blockage.
a. Close seacocks and clear
foreign material.
a. Empty holding tank.
b. Check wiring and circuit
breakers (or fuses).
c. Replace touchpad.
d. Replace control module.
a. Check water supply line.
b. Clear blockage at water valve.
c. Clear water filters.
d. Replace water valve.
a. Install an in-line water
accumulator tank or upgrade
the water pump.
b. Install an in-line water
accumulator tank.
c. Clear blockage at water valve
screen.
d. Replace water valve.