Troubleshooting - Dometic MasterFlush 7120 Operation Manual

8

Troubleshooting

Problem
1. Flush function works, but water
in 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.
10
Dometic MasterFlush Series Toilet / ORBIT Base
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 4 feet (1.2 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.
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.
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.
a. Check water supply line.
b. Clear blockage at water valve.
c. Clear water filters.
d. Replace water valve.