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FAQ
– How do I know if the compost is too dry?
The forming of hard lumps indicates that it is too dry. Another indication is that toilet paper remains on top instead
of becoming wet and getting mixed in to the compost.
– What to do if the compost becomes too dry?
Use the setting (15e and 25e) to reduce the heat to a lower level and spray a couple of litres of water on the
compost, at the same time it may be useful to break up the compost through the seat opening using the rake. If the
compost is consistently too dry, despite the setting being at step 1, then you can also install a timer that turns the
power off at night.
– How do I know if the compost is too wet?
When the compost is no longer able to absorb liquid, and it stays on top of the compost.
– What to do if the compost becomes too wet?
First check that power is connected to the toilet, so that the fan and heater works.The fan motor is working if you
are able to hear it and the heating you can check by holding your hand on the back of the toilet. Then check:
– The ventilation pipe has been installed according to the instructions and that it is insulated.
– The room temperature should be at least 18°C when toilet is beeing used..
– The toilet has been overloaded. Reduce the load.
– There is enough airflow through the wall vent.
Getting the compost drier
1. Mix a few litres of MullToa Special Humus into the moist compost until all the liquid has been absorbed.
2. If there is liquid in the level tube, turn the overloaded. Reduce. Do not turn it down to a lower
setting until the liquid regains its normal level.
3. If there is liquid in the level tube on the left side as viewed from the front, the tray has overflowed. Increase
(15e and 25e) the setting and wait a couple of days before emptying.
4. If the compost does not become drier, the excess liquid will need to be emptied. Loosen the level tube (26)
at the top and connect a garden hose. Note: Do not open the front cover.
5. If the toilet is full, empty the tray. It might be necessary to repeat this until the volume is back to normal.
– What to do if the tray is stuck
If the tray is stuck in place, due to compost between the tray and the grate having dried, release the tray by
pulling the humus rake back and forth between the tray and the grate.
– Emptying
For more frequent use, for example in the event of permanent use, the more often the tray has to be emptied.
If the toilet has not been used for the last 2 months, the contents in the tray can be used as fertilizer immediately.
But, when emptying the tray in the middle of the season, the contents needs to compost further for about
2 months. Remove the full tray and replace it with an additional tray (which can be bought from us). Put the
full tray in a plastic bag.
– What should not be put in to the toilet?
The disposal of items such as sanitary towels, tampons, cigarette butts, burning or glowing objects should
not be put into the toilet.
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– What do I do if the mixer motor does not work?
The mixer motor is protected in two different ways in order to prevent damange on mechanical parts.
– The motor runs normally, but the mixing arms do not move!
There is a shear pin mounted on the motor shaft. When the resistance is too high, the shear pin breaks and must
be replaced.
– The motor starts and stops and after a while it starts again by itself, but the mixing arms are still not moving!
The electrical motor has an overheating protection, which activates if the resistance is too high. It will turn itself off.
But it will try again after a while and it will repeat this until the high resistance in the compost has been resolved. It
usually is enough by mixing the compost using the rake and adding a few litres of water. See “What do I do if the
compost becomes too dry” page 8
– What do I do if the shear-pin breaks?
The shear pin can easily be replaced. The shearpin is not covered by warranty. An extra sprint is fixed next to the
mixermotor on 25e / 55ai / 65ai. On 15e is an extra sprint fixed on the back of the toilet.
– When do I need to call a qualified electrician?
MullToa is approved for installation in bathrooms. If the main cord is damaged it must be replaced by the
manufacturer or its service people, or another qualified person, to prevent injury. This manual should be
is placed near the toilet.
– Where do I get parts?
Contact your national dealer. Always have the serial number and model at and what year
it was bought. This information can be found on a sticker on back of the toilet.
– What to do if there is a bad odour in the toilet room?
A properly installed and maintained MullToa is completely odour-free. If you do experience a bad odour in the
toilet room, it is an indication that something is wrong. Make sure you have carefully followed the installation and
maintenance instructions (using the quick-guide below) and you will probably be able to
determine the cause of the problem.
– Check
1. That the MullToa is getting enough air through a vent in the outer wall.
2. Make sure the front cover is put on properly.
3. Avoid draughts by not having both windows and vents open at once, or bathroom fan running.
4. That the pipes fit the toilet properly.
5. That the pipe joints are sealed completely tight.
6. That any pipe bends you have are not over 45°, no have more than two bends.
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