10
8  Troubleshooting
Problem Possible Cause Service Instruction
1. Flush cycle operates correctly 
but water in the bowl empties 
slowly or not at all.
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. Check discharge piping.
b. Reroute discharge piping.
c. Close seacocks and clear 
blockage.
2. Macerator pump makes  
unusually loud noise or  
continually trips breaker.
a. Foreign material in pump 
chamber.
a. Close seacocks and clear foreign 
material.
3. Flush cycle is not activated after 
pushing on ush switch.
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. Empty holding tank.
b. Check wiring and circuit 
breakers (or fuses). 
c. Replace ush switch. 
d. Replace control module.
4. Insufcient or no water enters 
the bowl.
a. Water supply line is pinched or 
kinked.
b. Screen in water valve is blocked.
c. Intake water lters are blocked 
(in raw water system).
d. Water valve is malfunctioning.
a. Check water supply line.
b. Clear blockage at water valve.
c. Clear water lters.
d. Replace water valve.
5. Insufcient water ow during 
bidet operation.
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.
a. Disconnect water lines from 
mixer valve and clean screens. 
b. Unthread aerator nozzle and 
clean.
c. Replace mixer valve assembly.
Troubleshooting  SeaLand MasterFlush Toilet