Troubleshooting - Dometic MASTERFLUSH MF7100 Instructions De Montage Et De Service

Troubleshooting

I Use nontoxic antifreeze designated for potable
water systems. (See boat or vehicle owner's
manual.)

Caution
Never use automotive-type antifreeze in freshwater
systems.
PRESSURIZED FRESH WATER SYSTEM
1. Drain potable water tank and empty holding tank.
2. Add freshwater antifreeze to potable water tank.
3. Flush potable water antifreeze and water mixture
through toilet(s) and into entire system, including
the waste holding tank, diverter valve connections,
discharge pumps, etc. Turn off power to toilet.
Each installation is different, so amounts may vary. User
discretion is required to assure adequate protection.
SEA WATER SYSTEM
Parts required:
• Hose that fits raw water pump, about 3 ft. (1 m) long
• one container
1. Close intake and discharge seacocks. See Hazard of
Flooding risks in this manual.
2. Turn off power to toilet.
3. Disconnect and drain intake hose and in-line filters.
4. Connect hose to raw water pump intake.
5. Place hose connected to pump intake into bucket
with antifreeze in it.
6. Turn on power to toilet and flush until antifreeze is
removed from toilet.
7. Disconnect power to toilet and reconnect all intake
and drain hoses.
10
7 Troubleshooting
Problem Possible Cause
1. Flush function works, a. Discharge piping is
but water in bowl pinched or kinked.
empties slowly or not
b. Discharge piping is
at all.
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.
2. Macerator pump a. Foreign material in
makes unusually loud pump chamber.
noise or continually
trips breaker.
3. Flush cycle is not a. Holding tank is full
activated after and signal from
pushing on flush tank has shut down
switch. electrical power to
toilet.
b. Electrical power to
toilet is shut off or
disrupted.
c. Flush switch is
malfunctioning.
4. Insufficient or no a. Water supply line is
water enters the pinched or kinked.
bowl.
b. Screen in water valve
is blocked.
c. Intake water filters are
blocked
(in sea water system).
d. Water valve is
malfunctioning.
Macerator 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.
a. Check water
supply line.
b. Clear blockage at
water valve.
c. Clear water filters.
d. Replace water
valve.
EN