Ariterm LILLA FRO User manual

INSTALLATION and
OPERATING INSTRUCTIONS
PELLET STOVE LILLA FRÖ
ARITERM-SP-PX26868-A.1

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PELLET STOVE ARITERM LILLA FRÖ
ARITERM SWEDEN AB Installation Instructions - 2013.10.10 - 3/20
ARITERM-SP-PX26868-A.1
Unpacking
- Remove the wood packaging.
- Detach the side panels and install the feet as follows:
1. Loosen the screw on the top of the side panel.
2. Lift the side panel straight up.
3. Unhook the side panel by carefully prying with a screwdriver...
4. …and at the same time pull the panel out/forwards.
5. Also unhook the panel at the lower edge by pulling the panel
out/forwards.
6. Detach the side panel from the back panel by lifting it straight
back and slacken off the two wooden screws that hold the
stove to the pallet.
- Repeat 1 – 6 on the other side.
7. Lean the stove to the side, so the two adjustable feet can be
threaded in, as illustrated. Screw them in until they just reach
through the plate. Lock in place with counter nuts on the
underneath.
- Repeat on the other side.
- Lift the stove down off the pallet. Take hold of the stove’s
bottom plate. Do not lift by the back plate or the magazine.
Connect the control panel’s control cable, if this is not already
in place. Reinstall the side panels in reverse order according
to 6 - 1.
- Place the stove in its final location and connect it to the flue.
Adjust the height using the feet, if necessary.

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Care and maintenance summary
We recommend that you follow the care and maintenance instructions in order to obtain the best
possible results from your stove.
• The stove needs air in order to function, never close the supply air vent to the house.
(This is not an issue for those who chose a solution with Ariterm Arrow; this ensures that the
stove has air).
• Your engineer has adjusted the amount of fuel used in the stove’s starting dose. Use the menu
system to change the starting dose and output, see section 1.6 in the manual.
• We recommend removing the ash daily during the firing season, or each time pellets are filled.
Remove ash through the door using the handle supplied. Lift out the burner from the burner
housing and remove any ash from the ash box (unburned pellets must not be emptied into
the ash box, there is a risk of them starting to smoulder).
• After a period of use, the glass in the door becomes coated with soot and eventually becomes
opaque. Therefore, it should be cleaned on the inside using kitchen roll moistened with normal
tap water. We recommend that this is done every time the pellet hopper is refilled.
Wait until the glass has cooled before you start cleaning!
• Vacuum the ash from the ash box once between visits from the chimney sweep, which is
normally twice a year. The ash hatch is located behind the filler hatch and it can be lifted straight
up after the plastic knob has been screwed loose.
• The stove’s tubes are swept automatically using the sweeping unit (patent pending) every time
the hatch is opened, and they normally do not need any further sweeping.
• Vacuum the interior of the stove once a year to prevent the stove’ s fans from becoming jammed
by the soot that gets into the stove. To access the fan first pull out the plug then remove one of
the stove sides.
• If you have installed Ariterm Arrow, ash must be removed from it at least once every firing season.
NOTE! When you start your stove for the first time there may be a slight smell of paint, this is
because the paint on the stove body must cure fully before one can obtain odour free operation.

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Table of Contents
Product description
1.1 General ..................................... 5
1.2 Components.................................. 6
1.3 Technical data................................. 7
1.4 Control panel ................................7-8
1.5 Safety system ................................. 9
1.6 Control system, settings ......................... 9
1.6.1 Control duration.............................. 10
Installation
2.1 Positioning .................................. 11
2.2 Chimney.................................... 11
2.3 Ventilation .................................. 11
2.4 Ariterm Arrow ............................... 11
2.5 Electrical connection........................... 12
2.6 Documentation............................... 12
Operation and maintenance
3.1 Fuel ....................................... 13
3.2 Ash removal ................................. 13
3.3 Glass ...................................... 13
3.4 Sweeping ................................... 14
3.5 Hot air fan .................................. 14
3.6 Operating stoppage ........................... 14
3.6.1 Fault tracing and remedy ....................... 15
Dismantling
4.1 Burner ..................................... 17
4.2 Firing element................................ 17
4.3 Combustion fan .............................. 17
4.4 Flame detector ............................... 17
4.5 Hot air fan .................................. 18
4.6 Control circuit board........................... 18
4.7 Fuses ...................................... 18
4.8 Temperature sensors and safety switches ........... 18
Warranty
Warranty parts ............................... 18
Declaration of conformity ....................... 19
1 Product description
1.1 General
The Lilla Frö stove has been developed to work as a primary heat source. The stove’s high
level of efficiency, in combination with automatic operation, means that the stove replaces up
to 80 % of the heating in a normal family house with electricity as heating source. The stove
is designed for firing with wood pellets and requires an electrical power supply. In event of a
power cut, the stove requires a reserve power source from an uninterruptible power supply
(UPS) or a petrol driven generator in order to function.
The integrated convection fan distributes the hot air around the house, for best effect the
stove should be centrally located on the lower floor of the house. The room temperature is
easily set from the control panel. During thermostat operation the stove automatically ignites
and extinguishes the stove when the set temperature is reached.
It is filled with pellets by opening the hatch under the stove’s top panel. The spacious hopper
means that the stove only needs to be refilled a maximum of twice a day. The filler hatches
and door are equipped with safety switches. Two safety thermostats are mounted together
with the switches in a safety coil to prevent overheating and back-fire.
Lilla Frö can be installed without a traditional chimney if your home does not have one.
The solution that makes this possible is called Ariterm Arrow, which is a patent-pending, fan
controlled, flue gas duct that goes straight out through the wall.
The stove must not be used as an incinerator and must only be fired using wood pellets
acc. to EN 14961.
NOTE! The stove’s surfaces on and around the glass become extremely hot.

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Fig. 1
1.2 Components
The top panel (1) is opened by lifting the front edge. Under this are the ash hatch (2)
and the filler hatch (17) for the pellet hopper.
The front (5) is opened to reach the door (7). The door is unlocked with the enclosed
handle and it opens forwards, towards the floor. The burner housing (8) is located in the
hearth and is accessible when the door has been opened. It is installed with four screws
on the rear of the stove body. The burner (9) sits loose in the burner housing. The firing
element (10) is located in the burner housing behind the burner.
The firing element gives off the heat required to ignite the fuel. The flame sensor (11) is
beside the ignition unit and indicates whether there is flame in the burner. The ash box
(12) is inserted in the bottom of the hearth, under the burner housing. It can be removed
when the door has been opened.
The combustion fan (13) is placed on the rear of the burner housing and provides the
burner with air for combustion. If the stove is connected to the flue Drag, the fan is
replaced by a hose, which is connected to the wall lead-in. The control circuit board (15)
is placed inside the stove and it is powered by an electronic transformer that supplies
12V-voltage to the electronics and control and sensors. The hot air fan (16) is located
inside the stove and sucks air from the rear of the stove, which is then heated up in the
combustion chamber and smoke tubes (4) and expelled through holes, partly in the back
plate and partly in the front.
The pellet hopper (17) is filled through the filler hatch (18). The hatch is locked with a
knob. The pellet feeder (19) sits in the bottom of the pellet hopper and it consists of a
slowly rotating screw. The patented design means that pellets cannot stick in the feeder.
Safety thermostats (20) are mounted on the pellet hopper’s right side (trip at 85˚C) and
the ash box (trips at 204˚C).
The stove must not be modified and only spare parts recommended by the
manufacturer may be used.

877 ± 5
Ø76
430
1029
520
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1.3 Technical data
Heating output HI / LO........................................ approx. 5 / 3 kW
Pellet hopper .......................................... 30 litres (approx. 20 kg*)
Efficiency level HI / LO........................................ approx. 92 / 94%
CO HI / LO .................................................approx. 300 / 300 ppm
Smoke temperature HI / LO....................................... <180 / 120˚C
Flue gas fan HI / LO..................................................... 3.2 / 2.4 g/s
Temperature range thermostat............................approx. 10 - 30˚C
Weight .................................................................................75 kg
Electrical connection .................................................. 230 V 50 Hz
Electrical output (firing)....................................................... 450 W
Electrical output (operation).................................................. 20 W
Fuel ....................................wood pellets Ø6 or 8 mm, EN 14961.
* Depending on fuel density.
Fig. 3
1.4 Control panel
The control panel has a display and adjustment dial (see fig. 3):
- The display shows the operating mode and the current temperature.
Explanatory text scrolls through the display every 5 seconds.
- The adjustment dial is used by pressing or turning.
- Turn it to scroll through the menu or change the value when adjusting.
- Pushing once makes a selection in the menu.
- To ignore the change wait 4 seconds and the value is reset.
Example:
Power the stove. Pressing once causes the panel to ask “Start?”.
Pressing again means that you confirm the question and the stove starts.
If you turn one increment clockwise instead you jump in the main menu and
come to “Stop T”, “Usermenu” and “Back”.
Stop T: You set the desired stop temperature here.
Usermenu: The other time and temperature settings are adjusted here.
To make more advanced settings one must have
code “SetCode”.
The stove is started by pressing the control panel dial and confirming.
“Start?” by pressing again. Take care not to start the stove when there
are flammable objects above or immediately adjacent!
To shut off, press the control panel dial and confirm “Stop?” by pressing once.
Other menu steps are shown in section 1.6.

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Installing the control panel
1. Install the wall mounting with 2 screws.
2. Hook one corner of the panel onto the wall mounting.
3. Press the other corner of the panel onto the wall mounting.
Removing the control panel
1. Slide the panel straight up.
2. Lift the panel straight out from the wall
1
2
3
1
2
Connecting the control panel
Connect the control panel in the modular
connection on the side of the control
circuit board (image).

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1.5 Safety system
The K6 stove is equipped with five independent safety systems.
1. The feeder releases pellets into a chute, which means that the fuel cannot burn back and
spread the fire into the hopper.
2. The pellet hopper is equipped with a tight fitting filler hatch. The hatch must be closed and
locked during use, as soon as the hatch is opened the fuel feed is interrupted and a warning
text is shown on the display.
3. Two thermostats are located as shown in section 1.2 Components (fig 1). If the maximum
permitted temperature is exceeded the feeder stops, the stove switches itself off and the
display shows “Operational stoppage”. The alarm must be confirmed by pressing a button.
Do not forget to rectify the cause of the operational stoppage.
4. A flame sensor is located in the burner (fig 1).If the flame goes out or pellets
are fed in faster than they can be burnt and no flame is indicated for approx 3.5 minutes,
the stove switches itself off, and an exclamation mark illuminates while “operational stop-
page” scrolls through the display.
5. The door is equipped with a safety switch. The door must be closed during operation,
if it is opened the fuel feed is interrupted.
The safety switches are tested by unlocking the filler hatch during use or start-up.
The pellet feeder should then stop.
1.6 Control system settings
The settings are made in the control panel in a menu system. Before entering the menu
the panel is in display mode. Enter the menu by pressing the dial.
If the menu is inactive for a long time the panel returns to display mode. The menu system
consists of a main menu and several sub-menus “Usermenu” and “Settings”.
Turn the dial to scroll through the menu. To jump out of the menu, hold the button in
for 4 seconds. The menu appears as follows:
Main menu
Start? (Stop?) - Confirm by pressing once to start (stop).
Stop T - Press to select and adjust desired stop temperature.
Usermenu - Press for Usermenu.
Back - Press for display.
Usermenu
Settings
SetCode (021)
Settings - Press for Settings.
Service - Menu for authorised service technicians.
View - Press for Display menu
(See levels, operating time, programme version etc.)
OnTimer - Limited operating time.
TimeStrt - Start at desired time.
TimeStop - Stop at desired time.
NghtDrop - Possibility of lowering temperature below
specific time period during the day (1).
DayDrop - Possibility of lowering temperature below
specific time period during the day (2).
Assist.H - Set the lower temperature that is required
when maintenance heating is activated.
Clockset - Set date and time.
Back - Press for main menu.
Service - Menu for authorised service technicians.
Ign.dose - Adjust and test the pellet amount at ignition.
FeedHI - Adjust the pellet amount at high output.
TstHdose - Test the pellet amount at high output.
LoPowOn - Activate low output.
FeedLO - Adjust the pellet amount at low output.
TstLdose - Test the pellet amount at low output.
TempDiff - Adjust the number of degrees between start and stop.
AudioOff - Sound off or on.
Language - Select language.
ResOnLog - Operational time measurement is reset here.
Res#Ign - The counter for number of firings is reset here.
Default? - All the values are reset to factory settings here.
Back - Press for Usermenu.
Flame
Indicated
Firing element
Activated
Feeder motor
Activated
Combustion fan
Activated
Fault function
Indicated
Stove
in operation

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Otherwise the electronics manage all processes as follows:
• Start
1.6.1 control process
Time Events Comments
0 secs • Firing element on.
•The firing element symbol illuminates.
120 secs • The motor symbol illuminates.
• The feeder starts.
220 - 330 secs • The feeder stops (Starter dose).
• The combustion fans starts puls-
ing and stops twice.
• The motor symbol goes out.
The time depends on the set pellet
amount at ignition.
Pellet level should be approx. 5
mm above the firing element hole.
The flame symbol is displayed as
long as the flame sensor indicates
a flame.
Approx 6 min • Hot air fan on.
• If the flame sensor indicates
flame, the firing element is shut
off, the flame symbol illuminates
and the firing element symbol
goes out.
Approx 8 min • The feeder on at low output.
• Maximum time for firing element.
Runs from 1.8 - 6 seconds every
10th second.
Approx 10 min • Operating phase. The thermostat regulates the
output according to the set values.
• High output operation
After "Start". • High output scrolls through the
display.
• The feed runs from 3-10 seconds
every 10th second.
• Combustion fan Fan HI
The time depends on the set fuel
amount at high output.
Every 10 seconds. • Set temperature and room
temperature are compared.
If the room temperature exceeds the
set temperature, the stove switches to
low output. Not if ”Stop T” is ”On”.
• The flame sensor is checked If no flame can be detected the
exclamation mark illuminates and
the stove goes into ”Operational
stoppage” mode.
After "Start". • Low output scrolls through the
display.
• The feed runs from 1.8-6 seconds
every 10th second.
• Combustion fan Fan LO
The time depends on the set
pellet amount at low output.
Every 10 seconds. • Set temperature and room
temperature are compared.
If the room temperature exceeds
the set temperature by more than
2˚C the stove goes to stop and then
standby mode.
Standby scrolls through the display.
• The flame sensor is checked If no flame can be detected the
exclamation mark illuminates and
the stove goes into ”Operational
stoppage” mode.
0 secs • The feeder stops
• Combustion fan runs at max.
• The hot air fan runs
To blow ash out of the burner
crucible
4 min • Combustion fan stops
• The hot air fan stops
• Stop
Time Events Comments
• Low output operation (deactivated from the factory)

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2 Installation
2.1 Positioning
The installation must meet all applicable European standards, local and national
requirements.
The stove should be located in a central position on the lower floor of the house to facili-
tate heat spread. Consideration must be made of how the chimney is arranged, contact the
dealer. Try to avoid placing it in a corner, but if it cannot be avoided observe the minimum
distances to the walls according to fig. 7.
The Building regulations contain a number of regulations to prevent fires.
Generally speaking, the regulations are applied if the following is being observed:
• The stove must be placed at least 100 mm from the wall.
• The underlay must be made of non-flammable material, and extend at least 300 mm to
the front and 100 mm to the side of the stove. If the hearth surface is made of steel it
must be at least 0.7 mm thick.
• Flammable material must not be exposed to temperatures exceeding 80˚C.
Otherwise the stove must have at least 1 m free space on one side in order to allow service.
The weight of the stove is so low that no extra demands are made on the joists etc.
2.2 Chimney
The regulations regarding chimneys can be found in the Building regulations.
The most important regulations are:
• The highest surface temperature of the flue including insulation and surrounding shaft
may be 100˚C when the stove is running at full output. The surface temperature of
adjacent building parts may not exceed 80˚C.
• Minimum diameter (round duct) or side (rectangular duct) should be 80 mm.
• The smoke ducts must be made of non-flammable material of sufficient durability and
with sufficient resistance to temperature variations, climate effects, corrosive smoke
gases and slag and use of sweeping tools etc.
• It must be possible to clean the flue. If fallen ash cannot be removed via the stove’s
cleaning hatch another cleaning hatch must be arranged. The cleaning hatch must not
be located in a room other than the one in which the stove is located.
• Connection to the chimney must be via a steel flue pipe of at least 2 mm thickness,
or minimum 1 mm thickness if stainless steel. The joint is sealed with hard packed
glass fibre or elastic sealing compound that can tolerate at least 250˚C.
• All parts of the chimney situated outdoors must be insulated.
• The stove must NOT be connected to divided chimneys or flue gas ducts.
The smoke gases contain water vapour that can condense to water if the temperature is
sufficiently low (approx 55˚C) which can cause damage both to the chimney and stove.
If the temperature approx. 1 m below the chimney top is below 60˚C one should install
an insert, speak to your engineer or chimney sweep.
In the event of a chimney fire, pull out the plug and call the emergency services.
2.3 Ventilation
There must be at least one air supply ventilator in the room where the stove is located.
If there are other exhaust fans increase the number of supply ventilators until the fans no
longer affect the pressure ratio. We also recommend that a chimney fan is installed.
2.4 Ariterm Arrow
Information about installation with Ariterm Arrow instead of a traditional chimney is available
in a separate manual. See Arrow Wall fan Installation and Operation instructions.
Fig. 7

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Fig. 8
2.5 Electrical connection
The back of the stove is equipped with a
1.5 m long cable with plug, which must be
connected to a 230 V 50 Hz mains supply.
The internal wiring diagram
is shown in fig. 8.
NOTE! If the connection cable is damaged
it must be replaced by one of the same
type, contact the dealer.
2.6 Documentation
The stove must be installed, inspected and
commissioned by an authorised engineer.
At installation, the following data must be
collected and gathered under the section
Warranty and Installation proof.
• Manufacturing number
• Installation date
• Vacuum in chimney (cold)
• Vacuum in chimney (hot)
• Outdoor temperature
• Smoke gas temp at max operation
• Carbon dioxide content (CO2)
• Distance to combustible material
230 VAC
J3
J4
J1
J8 J5
J10
RS485
J6
J9
PE
Tacho sensor
(option)
Remote
(option)
orange
orange
brown
blue
yellow/green
grey
230 VAC
+V (20VDC)
-V (0VDC)
L
N
Power Supply
M
brown
brown
grey
black
blue
blue
white
blue
Convector fan
Safety switches
FUSES
2 x 3,15 AT
Connector
black
black
black
black
black
black
red
black
red
black
red
black
orange
white
Combustion fan
Ignition element
Light sensor
Ignition unit
red
white
black
red
brown
blue
Control panel
red
black
PWM Out
(option)
black
gray
brown
black
black
orange
Feeder motor
white
white
white
white

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3 Operation and maintenance
The K6 stove is designed for a long service life, motors and other moving parts are of a very
high quality. All bearings are lifetime lubricated and the only preventative maintenance that is
normally required is sweeping and cleaning.
3.1 Fuel
The K6 stove functions best with Ø6 or 8 mm wood pellets, max length 40 mm. The pellets
are supplied in plastic sacks that can be stacked on pallets or other suitable surfaces. Avoid
exposing the sacks to moisture or mechanical stresses (vibrations or blows). Careless handling
of pellets can easily reduce the fuel to sawdust. The sawdust is fed into the burner with the
pellets but can cause poor combustion. Fill the hopper with pellets slowly and without too
great a drop. The feeder completely empties the hopper and therefore does not normally
require cleaning.
The hopper is filled by opening the hatch above the pellet magazine.
Unlock by turning the locking knob a 1/4 turn clockwise. The hopper can be filled while the
stove is running, but because the feeder switches off when the hatches are opened, you only
have a few minutes before the hatch must be locked again. If the hatch is open for longer,
the flame is likely to get so low that the stove will switch itself off, after which it must be
restarted again after the switch is set to the “OFF” position.
The stove is started by moving the switch to the “ON” or “THERMOSTAT” positions.
Take care not to start the stove with flammable objects on top of, or in the immediate vicinity
of, the stove! Shut off is carried out by moving the switch to the “OFF” position.
The stove must not be covered.
3.2 Ash removal
The amount of ash that build up in the burner varies depending partially on how the stove
is fired (number of starts and stops, division between full and half speed), and partially on
the quality of the pellets. The ash content varies between different pellets, but can also differ
between different batches from the same factory. This can only be established through trial
and error, but generally the ash layer in the bottom should be a maximum of a centimetre
deep. We recommend removing the ash daily during the firing season, or each time pellets
are filled.
Remove ash through the door using the handle supplied. Lift out the burner from the burner
housing and remove any ash from the ash box (unburned pellets must not be emptied into
the ash box, there is a risk of them starting to smoulder). Certain pellets generate a hard cake
of cinders, this may need to be broken up using a screwdriver or removed using one’s hands.
Ash from the stove must be stored in a container made of non-flammable material, for
example a metal bucket, until it has cooled sufficiently that it can be held in one’s hand.
It can then be thrown away, bear in mind that wood ash contains nutrients that can be
beneficial to gardens.
3.3 The glass
During firing the stove door can get so hot that it can cause burn injuries if touched.
After a period of operation the glass in the door becomes coated with ash dust and
eventually becomes opaque. It should, therefore, be wiped off from the inside using
kitchen roll moistened with normal tap water, we recommend that this is done each
time the pellets store is filled. No cleaning agent is usually necessary.
When cleaning the black and stainless steel outer panels, only use water and, where neces-
sary, washing-up liquid.

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3.4 Sweeping
The chimney must be swept twice a year. The flue and its connection and the area
underneath the cleaning hatch must be cleaned at least once between the chimney
sweep’s visits.
1. Open the top panel.
2. Unscrew the knob that locks the ash box.
3. Lift the ash box vertically by both knobs.
4. Vacuum clean the ash from the ash box.
5. Vacuum the horizontal flue all the way to the chimney.
The hole is 50 mm in diameter, sufficiently large for a normal vacuum cleaner hose.
If the flue Drag is installed, the sweeping can be done from the outside.
6. Make sure that the ash hatch is firmly in place after cleaning and tighten the
knob properly.
The chimney must be checked for blockages if unused for a prolonged period.
3.5 Hot air fan
Vacuum cleaning of the fans with a brush nozzle should be carried out a couple of times
annually after removing the side hatch.
Do not forget to pull the plug out before the side hatch is removed.
1. Open the top panel.
2. Loosen the screw on the top of the side panel.
3. Snap the back of the side panel from the stove’s back plate by prizing back the top and
bottom corners of the side panel.
4. Unhook the panel, out - forwards.
NOTE! When vacuuming the hot air fan, be careful not to damage the long and
vulnerable fan blades.
The fan bearings can start to whistle after operating for some time in a dusty environment.
Rectify this with a drop of oil on both bearings.
3.6 Operating stoppage
If the stove does not start, check first where the fault is located using the fault-tracing
diagram below. If you consider that you have the necessary expertise, rectify the fault as
suggested. If not, or if the fault cannot be located, contact your dealer.
After an unsuccessful start attempt or operating stoppage, the burner crucible
must always be emptied! If there are unburned pellets in the crucible it must not
be emptied into the ash box.

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The stove does not
start, green LED does
not light.
• The cable is not connected.
• No voltage at the socket.
• Stove fuse blown.
• The cable between the control
panel and the control circuit
board is not correctly con-
nected.
• The stove is in the cooling
phase.
Connect to earthed 230 V socket.
Check the fuse.
Change the fuse
Remove one side hatch and check
that the cable is connected to the
card device. Check the same thing
on the rear of the control panel.
Wait until the fans have stopped.
Fault Cause Action
The stove does not
start, ”Standby” is
shown in the display.
• Room temperature exceeds the
set value by more than 2˚C.
Set the desired room temperature
according to section 1.6.
Pellets do not come out
of the feeder.
• The hopper is empty.
• One of the MCBs is not
switched on.
• One of the safety thermostats
has deployed.
• Pellets have jammed in the
feeder.
• The feeder does not rotate.
Fill up the pellets.
Ensure that the filler hatch is closed
and locked properly. A slight clicking
noise should be heard when the safety
switch is activated.
Check the fuel volume, and that the
hot air fan functions. Wait until the
stove has cooled. Reset by pressing
the control panel.
Feel inside the chute, in case pellets
have jammed there. Empty the
hopper. Loosen the panel above
the feeder screw and remove any
blocked pellets.
Open the filler hatch, press down
the safety switch to the right of
the filling hole. If the feeder screw
does not move (1 turn/min), check
whether there is a voltage on the
motor’s terminal block, on the hop-
per’s right side under the insulation.
Pellets do not ignite (no
smoke)
• The firing element does not
work.
• Bad connection.
• Starting dose too small.
Replace firing element.
Check wiring and connections.
Adjust the fuel volume.
Fault Cause Action
The stove stops shortly
after starting (excla-
mation mark in the
display)
• Starting dose too small.
• One of the safety thermostats
has deployed.
Adjust the fuel volume.
Remove the burner and check that
the flame sensor is in the correct
position and that the lens is clean.
Clean flue, convection tubes, fans
and ensure that the air intake of the
stove is not blocked.
Water is penetrating
the chimney joints or
is seen in the form of
grey/white smoke.
• Too low output.
• Too low smoke temperature for
the chimney.
Increase the fuel volume.
The smoke temperature in the
chimney 1 m below the top must
be at least 60˚C.
After an unsuccessful start attempt or operating
stoppage, the burner crucible must always be
emptied!
3.6.1 Fault tracing and remedy

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Error codes
Cause Action Cause Action
Error code Error code
ErrorHI:
The flame sensor has
not detected a flame
during high output.
• Incorrectly adjusted fuel and/or
air amount.
("FeedHI" or "Fan HI")
• The hopper is empty.
• Pellets have jammed in the
feeder.
• The feeder auger does not
rotate.
See Menu.
Fill up the pellets.
Remove pellets from the chute.
Ensure that there are no foreign
objects in the chute.
Check that there are no foreign
objects stuck in the feeder auger.
Check switches and wiring to the
motor.
Replace motor.
ErrorLO:
The flame sensor has
not detected a flame
during low output.
• Incorrectly adjusted fuel and/or
air amount.
("FeedLO" or "Fan LO")
• The hopper is empty.
• Pellets have jammed in the
feeder.
• The feeder auger does not
rotate.
See Menu.
Fill up the pellets.
Remove pellets from the chute.
Ensure that there are no foreign
objects in the chute.
Check that there are no foreign
objects stuck in the feeder auger.
Check switches and wiring to the
motor.
Replace motor.
Powfail. • Power failure. Check the electrical connection.
Errign:
The firing element
is not drawing any
power.
• Poor contact to firing element.
• Defective firing element.
Check wiring and connections.
Replace firing element.
ErrSafe:
The flame sensor has
not detected a flame
when the safety coil
has been broken.
• One of the safety thermostats
has deployed.
• One of the hatch switches is
not switched on.
Check the fuel volume, and that
the hot air fan functions. Clean the
convection tubes. Reset by pressing
on the panel.
Ensure that the hatch and door is
properly closed. A weak clicking
noise must be heard when closed.
ErrStart:
The flame sensor has
not detected a flame
during the start-up
phase.
• The hopper is empty.
• Pellets have jammed in the
feeder.
• The feeder auger does not
rotate.
• Incorrectly adjusted starting
dose. (”lgn.dose”)
Fill up the pellets.
Remove pellets from the chute.
Ensure that there are no foreign
objects in the chute.
Check that there are no foreign
objects stuck in the feeder auger.
Check switches and wiring to the
motor.
Replace motor.
See Menu.

Joonis 10a
Joonis 10b
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ARITERM-SP-PX26868-A.1
4 Dismantling
4.1 Burner
1. Open the door and remove the ash box.
2. Remove the four screws holding the burner flange to the stove wall (fig 10).
3. Pull the burner straight out until the cables connecting the burner to the control circuit
board are visible. Squeeze the locking catches together and pull the two connectors
apart. The burner can now be removed.
4. Reinstall in reverse order.
4.2 Firing element
1. Remove the burner as above.
2. Remove the four screws (1) holding the upper part of the ignition bracket.
The firing element is now free.
3. Disconnect the firing element’s cables from the triac control and the terminal block.
4. Loosen the screw (3) that secures the firing sleeve. Remove the firing sleeve from
the element. Pull out the cables from the lead-ins.
5. Reinstall in reverse order.
4.3 Combustion fan
1 Remove the burner and the ignition console according to the Firing element section.
2. Remove the red and the blue cable from the terminal block on the side of the bracket.
3. Remove the screws (2) holding the fan to the bracket.
4. Reinstall in reverse order.
4.4 Flame detector
1. Remove the burner and the ignition console according to the Firing element section.
2. Remove the cables from the terminal block in the side of the bracket.
3. Remove the flame sensor, but first note how it sits at the side of the bracket.
4. Reinstall in reverse order. The flame sensor must stick in approximately 5 - 10 mm
through the burner flange.

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4.5 Hot air fan
Work is best carried out with both side hatches removed, but they can also be accessed
from one side or the other.
1. Remove the plug from the wall socket.
2. Open the top panel.
3. Loosen the screw on the top of the side panel.
4. Snap the back of the side panel from the stove’s back plate by prizing back the top
and bottom corners of the side panel.
5. Unhook the panel, out - forwards.
6. Carefully pull the connector barrels from the fan motor.
7. Loosen from the back the two screws that fasten the fan bracket to the back plate
and coax the fan out.
4.6 Control circuit board
1. Remove the plug from the wall socket.
2. Remove one of the side hatches according to the Hot air fan section.
3. Loosen the edge contacts on the control circuit board’s long sides by pulling them
straight out.
4. Disconnect the cable for the control panel located in a connector on the right edge of
the control circuit board. Press in the hook on the underside of the connector and pull
the cable straight out to the side.
5. Release the three panel screws on the rear of the stove and remove the control
circuit board.
4.7 Fuses
1. There are two fuses on the stove’s input connector. Both are 3.15A slow.
2. When replacing the fuses pull the connector cover straight out to access the
fuses (Fig. 11).
4.8 Temperature sensor and fused switch
This work must be carried out by an authorised engineer.
5 Warranty
For warranty issues Ariterm Sweden AB refers to our local Distributor.
Fig. 11

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The Clean Air Act 1993 and Smoke Control Areas
Under the Clean Air Act local authorities may declare the whole or part of the district of
theauthority to be a smoke control area. It is an offence to emit smoke from a chimney of
a building, from a furnace or from any fixed boiler if located in a designated smoke control
area. It is also an offence to acquire an “unauthorised fuel” for use within a smoke control
area unless it is used in an “exempt” appliance (“exempted” from the controls which
generally apply in the smoke control area).
The Secretary of State for Environment, Food and Rural Affairs has powers under the Act to
authorise smokeless fuels or exempt appliances for use in smoke control areas in England.
In Scotland and Wales this power rests with Ministers in the devolved administrations for
those countries. Separate legislation, the Clean Air (Northern Ireland) Order 1981, applies in
Northern Ireland. Therefore it is a requirement that fuels burnt or obtained for use in smoke
control areas have been “authorised” in Regulations and that appliances used to burn solid
fuel in those areas (other than “authorised” fuels) have been exempted by an Order made
and signed by the Secretary of State or Minister in the devolved administrations.
Further information on the requirements of the Clean Air Act can be found here :
http://smokecontrol.defra.gov.uk/
Your local authority is responsible for implementing the Clean Air Act 1993 including
designation and supervision of smoke control areas and you can contact them for details
of Clean Air Act requirements
The Ariterm Lilla Fro pellet stove has been recommended as suitable for use in smoke
control areas when burning wood pellets.

PELLET STOVE ARITERM LILLA FRÖ
ARITERM SWEDEN AB Installation Instructions - 2013.10.10 - 20/20
ARITERM-SP-PX26868-A.1
Ariterm Sweden AB
Flottiljvägen 15, SE-392 41 Kalmar
www.ariterm.se
If these instructions are not followed at installation, operation
and maintenance, Ariterm Sweden AB’s applicable warranties are not binding.
Ariterm reserves the right to make changes to components and specifications
without prior notice.