Troubleshooting - Dometic 8900 Series Operation Manual

Troubleshooting

8 Troubleshooting
Problem
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 switch .
4 . Insufficient or no water enters
the bowl .
5 . Insufficient water flow during
bidet operation .
10
Possible Cause
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 switch is malfunctioning .
d . Circuit board in 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 . Clogged inlet screen at hot or
cold connection at toilet/bidet
mixer valve .
b . Clogged aerator in bidet nozzle
inside toilet bowl .
c . Toilet/bidet mixer valve assembly
is not functioning properly .
SeaLand MasterFlush Toilet
Service Instruction
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 flush switch .
d . Replace control module .
a . Check water supply line .
b . Clear blockage at water valve .
c . Clear water filters .
d . Replace water valve .
a . Disconnect water lines from
mixer valve and clean screens .
b . Unthread aerator nozzle and
clean .
c . Replace mixer valve assembly .