Komfovent C6.1 User manual

C6.1
EN Electrical installation and Operation Manual
C6.2

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WEEE Directive (2002/96/EC) and your national law. This product should be handed over to a designated
collection point, or to an authorised collection site for recycling waste electrical and electronic equipment (EEE).
Improper handling of this type of waste could have a possible negative impact on the environment and human
health due to potentially hazardous substances that are generally associated with EEE. At the same time, your
cooperation in the correct disposal of this product will contribute to the effective usage of natural resources. For
more information about where you can drop off your waste equipment for recycling, please contact your local city
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Content
1. ELECTRICAL INSTALLATION INSTRUCTIONS......................................................................................... 4
1.1. Power supply connection ........................................................................................................................... 4
1.2. Control panel installation............................................................................................................................ 4
1.3. Connection of external elements ............................................................................................................... 5
1.4. Temperature sensor installation ................................................................................................................. 6
2. OPERATING MANUAL................................................................................................................................... 6
2.1. Unit control with the control panel.............................................................................................................. 6
2.2. Unit operation via a web browser............................................................................................................... 7
2.3. Unit control with a smartphone................................................................................................................... 8
2.4. Control Panel C6.1..................................................................................................................................... 8
2.4.1. Displayed symbols on the panel ...................................................................................................... 9
2.4.2. Review of the parameters................................................................................................................ 9
2.4.3. Operation mode selection.............................................................................................................. 10
2.4.4. ECO mode ......................................................................................................................................11
2.4.5. AUTO mode ....................................................................................................................................11
2.4.6. Menu.............................................................................................................................................. 12
2.4.6.1. Overview........................................................................................................................... 12
2.4.6.2. Scheduling........................................................................................................................ 13
2.4.6.3. Air quality .......................................................................................................................... 14
2.4.6.4. Settings............................................................................................................................. 15
2.4.6.5. Advanced settings ............................................................................................................ 15
2.5. Control Panel C6.2................................................................................................................................... 17
2.5.1. Operating mode selection.............................................................................................................. 17
2.5.2. „ECO“............................................................................................................................................. 18
2.5.3. AUTO mode ................................................................................................................................... 18
2.5.4. Warning indicator ........................................................................................................................... 18
2.5.5. Reset button .................................................................................................................................. 18
2.5.6. Turning the unit on/off .................................................................................................................... 18
2.5.7. Keypad lock ................................................................................................................................... 18
2.6. Troubleshooting........................................................................................................................................ 18

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1. ELECTRICAL INSTALLATION INSTRUCTIONS
The installation can only be performed by qualied personnel. It is necessary to follow the requirements below
during the installation.
It is recommended to lay the control cables separately from the power
cables, at a minimum distance of 20 cm.
The connector connection is performed strictly according to the wiring
diagram numbering, or with adequate markings (see the principal wiring
diagram of the unit).
When removing the unit parts, do not pull on the connecting wires and
cables!
Before performing any work inside the equipment, make sure that the air
handling is switched off and disconnected from the mains power supply.
1.1. Power supply connection
The unit is designed for a supply voltage of 230 V AC, or 50 Hz; therefore, you must install a socket with an
earthing of the corresponding capacity next to it (see the wiring diagram). The power cable type is indicated in
the wiring diagram.
The unit must be connected to the stationary installation using a 16 A
circuit breaker with 300 mA current leakage protection (type B or B+).
The air handling unit is designed to connect only to a neat outlet, with
protective grounding meeting all the electrical safety requirements.
1.2. Control panel installation
1. The control panel must be installed in the premises under the following conditions:
• at an ambient temperature of 0 °C... 40 °C;
• relative humidity ranging from 20%... 80 %;
• protection from accidentally vertically falling water drops (IP X2).
2. Control panel connection through the hole in the back or in the bottom.
3. The control panel can be mounted on a ush mounting box or in any other place, simply by screwing it to
the surface through the two holes on the fastening surface.
4. The control panel is connected to the controller box. The length of installation cable for the control panel
may not exceed 150 m. The cable type is specied in the principal wiring diagram.
Control panel connection
Yellow (A) () White
(+) RedGreen (B)
Yellow (A)
(+) Red
Green (B)
() White Yellow (A) () White
(+) RedGreen (B)
Yellow (A)
(+) Red
Green (B)
() White
The cable thicknesses for the panel connection and others are specied
in the wiring diagram!

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1.3. Connection of external elements
The air handling unit has external connection terminals in the control box, inside the air handling unit. They are
used to connect all the external control elements.
1 2 3
1. Ethernet connection of computer network or Internet
2. Controller panel connection
3. Connection of external elements
Fig. 1.3 a. Controller with the connection terminals
Fig. 1.3 b Connection diagram for external elements
The total power of all the external elements, powered from a 24 V volt-
age, must not exceed 30 W.

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1.4. Temperature sensor installation
The air supply temperature sensor B1 (Fig. 1.4a) must be installed in the air supply duct after cooler section (if
not, then after heater). The minimal distance from the duct connection of the unit up to the sensor be not less
than two circular connection diameters. The water temperature sensor B5 (Fig. 1.4 b.) is mounted on the return
water pipe, by screwing it into the provided hole. The sensor must be thermally insulated!
Supply air temperature sensor B1 Water temperature sensor B5
Fig. 1.4 a Fig. 1.4 b
B
D
≥ 5D
+–
B1
2. OPERATING MANUAL
2.1. Unit control with the control panel
The air handling unit can be operated by one of the following panels (Fig. 2.1).
C6.1 – panel with a touch screen for parameters of air handling unit setting and indication. The panel has inte-
grated thermometer and hygrometer for indoor climate monitoring.
C6.2 – panel with touch-sensitive buttons is intended for main air handling unit parameters setting.
C6.1 C6.2
Fig. 2.1. Choice of control panels

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2.2. Unit operation via a web browser
Not only the control panel, but also a computer can be used to monitor the operation of unit and its components,
as well as changing the settings and activating additional functions. You only have to connect the unit separate
with the network cable, to a computer, local network or Internet.
Procedure for the direct connection to the computer:
1. Plug one end of the cable into the network socket in the controller (see Fig. 1.3 a.), and the other into the
computer.
2. On the computer, in the manual setting box of the computer’s network card, enter the IP address, e.g.,
192.168.0.200 and a subnet mask: 255.255.0.0.
3. Run the Internet browser on the computer and disable the use of all Proxy servers in the settings.
4. In the web browser address bar, enter the default IP address of the air handling unit, 192.168.0.60; but this
can be changed at any time in the panel (in the Advanced Settings menu), and on-line via a web browser
(see the login interface settings).
Tip: Before using, it is recommended to update your web browser to the newest version.
5. If the connection was successful, a window will open where you will have to enter a user name and login
password:
Tip: The user’s login name is “user”. The initial password is also “user”, but the user can later change this to
any other password (see the user interface settings).
Should you forget a changed password, it can be reset to the initial
“user”. To do this, you must restore the factory settings for the air han-
dling unit.

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2.3. Unit control with a smartphone
After connecting the air handling unit to a computer network or the Internet, it can be controlled with your
smart phone with an iOS or Android operating system. Download and install the mobile app and, depending on
whether the air handling unit will be available in the internal or external computer network, enter the appropriate
settings (described in more detail in the “Mobile applet installation instructions”).
To download the applet, scan the necessary link, or just search for it in the GooglePlay or iTunes stores.
Tip: The applet user interface and the control capabilities are fully consistent with the C6.1 control.
2.4. Control Panel C6.1
Fig. 2.4. C6.1 panel main window
Time
Button for activation
of ECO operating
mode
Menu
Indication of
equipment modes/
functions
Indication of actual
operating mode
Button for activation
of AUTO operating
mode

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2.4.1. Displayed symbols on the panel12
Fan operation
Energy recovery operation
Air heater operation
Air cooler operation1
There is a heating demand, but it is
being blocked by the ECO mode2
There is a cooling demand, but it is
being blocked by the ECO modes2
ECO mode on2.
Air ow reduction.
ECO mode on2. Free cooling
operation.
ECO mode on2. Free heating
operation.
Alarm signal
(see the troubleshooting section)
Supply air
Exhaust air
Outside air temperature
Air lters
Instant heat recovery of the air
handling unit
Instant power consumption of the
air handling unit
2.4.2. Review of the parameters
Main unit parameters: air ow, temperature and lter clogging are displayed in the second window, and the
energy parameters – energy recovery and power consumption – are displayed in the third panel window.
Tip: For window scrolls, swipe your nger on the screen to the appropriate side.
All other air handling unit parameters are presented in the “Overview” menu item (see Section 2.4.6.1.).
1 The air handling unit has the air cooling function, but it requires the following additional components which should be ordered
in advance: DCW duct coil (for water cooling) or DCF duct coil with outdoor DX unit (for DX cooling).
2 For more about the ECO mode, read Section 2.4.4.

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2.4.3. Operation mode selection
There is provided four usual operation and four special operation modes. User can choose one of them from
the main panel window by clicking on the center button.
NORMALAWAY
INTENSIVE BOOST
HOLIDAYSOVERRIDE
KICHEN FIREPLACE
Operation modes
Usual operation modes
Away. The recommended choice when you are not at home or when there are fewer people
inside the premises than usual. The ventilation intensity will be 20%.
Normal. Recommended when there is the usual number of people inside the premises. The
ventilation intensity will be 50%.
Intensive. The recommended choice when there are more people inside the premises than
usual. The ventilation intensity will be 70%.
Boost. The recommended choice when it is necessary to quickly ventilate the premises. The
ventilation will run at its maximum intensity.
Special operation modes
Kitchen. Recommended during cooking, when running the kitchen hood. This mode increases
the efciency of the hood, as the air handling unit will increase the air ow to the premises by up
to 80%, and the discharge is reduced to a minimum intensity of 20%.
Fireplace. The recommended choice when lighting a replace. This mode improves the suction
of the smoke through the chimney, causing a small overpressure in the room, because the unit
supplies fresh air at a 60% intensity and removes the air from the premises at a 50% intensity.
Override. This mode activates the air handling unit at the set intensity of 80%, despite the other
mode settings. This mode has the highest priority over the other modes, and will run even after
the air handling unit has been turned off.
Holidays. The recommended choice when leaving home for a longer period of time. The prem-
ises will be ventilated periodically in 30 min. cycles (several times a day) at the minimum intensity.
Any special operating modes can be activated in the panel and by using a mobile phone or computer. When
you select a special mode, you will need to enter the duration of its operation, after which the air handling unit
will return to the previous mode. KITCHEN, FIREPLACE and OVERRIDE modes are set for time range from
1 to 300 min. In HOLIDAY mode, the time interval can be set from 1 day to 90 days, or a specic date can be
selected.
The KITCHEN, FIREPLACE and OVERRIDE special modes can be ac-
tivated by the external control contacts (Fig. 1.3 b). Modes activation by
the contacts has a priority.

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2.4.4. ECO mode
ECO – an energy-saving mode to minimize the power consumption of the air
handling unit. The ECO mode has three-fold operation effects:
• Blocking the electric heater operation in the air handling unit, and blocking of
all external air heating/cooling elements.
• Activation of the Free cooling function, which at some point blocks the heat
recovery process, if the outdoor coolness has to be used in an energy-ef-
cient way. Cooling with the outdoor air automatically starts if the room air
temperature is above a set value, and the outdoor air temperature at that time
is lower than that in the room but not below the set min. value. Similarly, in
the case of the opposite temperature conditions. Free heating is carried out.
• As the temperature control with heat recovery alone will not be ensured at all
times, in the case of an extreme conditions, when the supply air temperature
is below the specied minimum value (in winter) or exceeds the maximum
value (in summer), the unit will try to maintain the temperature by decreasing
the ventilation intensity. If the temperature does not reach the required min./
max. limits over a long period of time, the air volume can be reduced to the lowest possible value (20%).
The ECO mode settings are preset at the factory, but the operation mode can be modied. This requires
push and hold for ve seconds the ECO button in the initial start-up window. In the window that opens, you can
change the default settings.
2.4.5. AUTO mode
AUTO – an automatic operation mode when the unit is operating and changing the ventilation intensity based
on the chosen (pre-set) weekly operating schedule.
However, if at least one air quality sensor is connected to the air handling
unit, the AUTO key will activate the automatic air quality control function.
Then, the ventilation intensity is adjusted, not according to the schedule, but
according to the current air pollution in the room.
See more details in Section 2.4.6.3.
The parameters for all eight modes are preset at the factory, but each of them can be modied individually.
This requires selecting the desired mode and touching the icon for ve seconds. In the window that opens, you
can change the air ow, temperature and deactivate the electric heater in the unit:
Reset settings
Supply ow
250 m3/h
Extract ow
250 m3/h
Electric heater
On
Air temperature
20°C
NORMAL
Heater blocking
On
Cooler blocking
On
Min. supply temperature
15°C
Free cooling
On
ECO mode
Max. supply temperature
25°C
Reset settings

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2.4.6. Menu
The settings menu consists of four points, where
you can view the relevant user information,
choose the operating schedule, change the set-
tings or turn off the unit.
If to the air handling unit is connected the air
quality or humidity sensor, then the “Scheduling”
menu item will disappear and instead of it, you
will see “Air Quality”. See more details in Sec-
tion 2.4.6.3.
Detailed information
Eciency & consumption
Alarms
Energy counters
Overview
2.4.6.1. Overview
The user can view the main air handling unit settings in the start-up windows
(see Section 2.4.2.). However, all other information related to the operation
of the unit, as well as to malfunctions and efciency states, is provided in a
detailed review of the menu item.
Detailed information
Supply ow
350 m3/h
1 / 3
Supply air temperature
21,9 °C
Extract air temperature
22,1 °C
Air temperature
16,6 °C
Water temperature
25,3 °C
Detailed information. All temperature sensor readings, functioning of sepa-
rate air handling unit elements and other detailed information is available in
this menu
Menu
Overview
Scheduling
Settings
TURN OFF
or
Menu
Overview
Air quality
Settings
TURN OFF
Efciency and consumption. The menu is used for monitoring the heat ex-
changer efciency, energy savings, heat recovery and power consumption in
real time.
Eciency & consumption
Power consumption
1050 W
Specic power (SPI)
0,32
Heat exchanger eciency
83%
Energy saving
90%
Heat recovery
4011 W
Heating power
850 W

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Energy counters. This menu shows how much en-
ergy is recovered by the heat exchanger, as well as
the energy consumed by the heater and the entire
unit. It also shows the average daily value of the spe-
cic power of the air handling unit (SPI).
Recovered energy, kWh
Day / Month / Total
24 / 720 / 2160
Consumed energy, kWh
Day / Month / Total
11 / 353 / 960
Specic power (SPI) per day
0,38
Heating energy, kWh
Day / Month / Total
9,6 / 288 / 777
Energy counters
Alarms. This menu displays messages about exist-
ing faults. After the removal of the fault (see Chapter
2.6), these messages can be deleted by selecting
Delete. By pressing the “History” button, you can
view up to 50 faults in the recorded history.
Alarms
F6
Electric heater overheat
F4
Low supply air temperature
Delete History
2.4.6.2. Scheduling
The menu item is used for planning the air handling unit operations, according to a weekly program.
The user can select one of the four schedules using the arrows at the bottom:
Scheduling
04 8 12 16 20 24
Pr
An
Tr
Kt
Pt
Št
Sk
STAY AT HOME
• STAY AT HOME
Recommended when there are always people in the residential premises
and ventilation is always needed.
• WORKING WEEK
Recommended when people are at work during the daytime, i.e. they are
at home only in the morning and evening, and on weekends.
• OFFICE
Recommended if the unit is installed in an ofce, and the ventilation is
required only during the day and only on weekdays.
• CUSTOM
Schedule available for an individual user’s programming. The program is
not set by default.
The schedules are preset at the factory, but each of them can be modied
individually, or the user can create his own schedule. To do this, select the
preferred schedule and touch the schedule in the centre of the screen for ve
seconds.
All of the above schedules can have up to four different operation pro-
grams. Each program can be made of ve events.
To start the program, or the event, click “+” – and to cancel it click “X”.
To view the programs (if there are several of them), click on the gures in
the bottom of the application bar: 1, 2, 3 or 4.
After adding a new event, rst choose the days of the week in the program,
then continue to set the operation modes: AWAY, NORMAL, INTENSIVE or
BOOST and the operation start and end times.
STAY AT HOME
1 2 3
Mo Tu We Th Fr Sa Su
08:00 16:00
16:00 17:00
17:00 20:00
To disable the air handling unit, you can set the STANDBY mode, or when setting the program’s events just
make a break at the times when the unit must not operate.
In order for the air handling unit to operate according to the selected weekly
schedule, press the AUTO button on the main window (Fig. 2.4).

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Factory set schedules
STAY AT HOME
Program No. Days of the week Event start time Event end time Mode
1 Mo - Su
00:00 08:00 AWAY
08:00 22:00 NORMAL
22:00 24:00 AWAY
WORKING WEEK
Program No. Days of the week Event start time Event end time Mode
1 Mo - Fr
00:00 06:00 AWAY
06:00 08:00 NORMAL
08:00 16:00 STANDBY
16:00 22:00 NORMAL
22:00 24:00 AWAY
2 Sa
00:00 09:00 AWAY
09:00 16:00 NORMAL
16:00 20:00 INTENSIVE
20:00 23:00 NORMAL
23:00 24:00 AWAY
3 Su
00:00 09:00 AWAY
09:00 22:00 NORMAL
22:00 24:00 AWAY
OFFICE
Program No. Days of the week Event start time Event end time Mode
1 Mo - Fr
07:00 08:00 AWAY
08:00 12:00 NORMAL
12:00 17:00 INTENSIVE
17:00 18:00 AWAY
2.4.6.3. Air quality
When the external air quality or humidity sensors are connected to the control
terminals, automatically activates the air quality control, and the “Scheduling”
menu item is replaced by “Air Quality”.
Operation of air handling unit according to the air quality sensors ensures
the maximum comfort with the minimum consumption, i.e. the user does not
need to plan the schedule because the ventilation intensity is adjusted auto-
matically, depending on indoor air pollution.
To activate the air quality mode, click the AUTO button on the
main control panel window (Fig. 2.4).

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Air quality
800 ppm
Air humidity
80%
Electric heater
On
Air temperature
20C
Air quality
Reset settings
In the “Air Quality” settings menu item, the user can set the maintained air
quality or humidity value, as well as the maintained temperature, and can de-
activate the electric heater in the unit, if necessary.
2.4.6.4. Settings
This menu item is used for the user interface basic settings. You can use it
to change the menu language, measurement units, time and the other panel
settings.
Language
English
Flow units
m3/h
Panel lock
None
Screen saver
On
Settings
Atstatyti nustatymus
Touch sound
Click
Time/Date
2.4.6.5. Advanced settings
Additional air handling unit settings are provided in a deeper menu screen. To
open the advanced settings window, press the “Settings” menu button for ve
seconds.
Temperature control. The air handling unit has several temperature main-
tenance methods:
• Supply. The unit provides the air at the user-dened temperature.
• Extract. The unit automatically supplies the air at a temperature so that the
set temperature of the extract air is maintained.
• Room. The unit control the ambient temperature, according to the tempera-
ture sensor in the panel.
• Balance. The temperature control value of the supply air is automatically set
on the basis of the current extract air temperature, i.e. what the air will be
removed from the premises, and the same will be returned back.
After selecting the “Balance” mode, the temperature setting will disappear.
Flow control. Supply and exhaust air ow control modes:
• CAV – constant air ow control mode. The unit supplies and exhausts a constant air volume set by the user,
regardless of the pollution condition of the air lters and the ventilation system changes.
When activating the air handling unit for the rst time, the air ow state-
ments may differ from the real ow until the end of the air ow calibration
process. The adaptation process may take up to one hour before all the
parameters become stable.
• VAV – variable air volume control mode. The unit will supply and exhaust the air volume depending on the
ventilation needs in different rooms, i.e., the constant pressure in the system will be maintained by the vari-
able air volumes. After selecting the VAV ow control, the user will have to set the pressure maintained by
the ventilation system for each of the four modes.
Temperature control
Flow control
Control sequence
Air quality control
Advanced settings
Reset settings
Connectivity

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This function requires additional VAV sensors, which must be ordered sepa-
rately. The connection of the sensor is shown in Fig. 1.3b.
If you select the VAV ow regime, the automatic air quality support will be
disabled. The AUTO button will activate the weekly operation schedule.
• DCV – Directly Controlled Volume). The air handling unit will operate similarly as in the CAV mode, but air
volumes will be maintained directly in accordance with the values of the B6 and B7 analog input signals
of controller. After giving the signal 0... 10 V to the appropriate input, it will be converted according to the
current determined air volume. For example, if the maximum air ow of the unit is 500 m3/h, setpoint in the
panel – 250 m3/h, and the B6 input value – 7 V, the unit will supply constant air volume of 175 m3/h, i. e.,
70 % of the set value. The same applies to the exhaust air only by B7 input.
With special modes (KITCHEN, FIREPLACE, OVERRIDE and HOLIDAYS)
the unit will always operate only in the CAV mode, regardless of the selected
ow control.
Air quality control. Air quality control is activated by default. In order for the
unit to operate in the AUTO mode not according to the air quality, but according
to the weekly schedule, this function can be deactivated.
Air quality control is provided with the several sensors. Their types are con-
gured as follows:
CO2 – Carbon dioxide concentration sensor [0...2000 ppm];
VOC – Air quality sensor [0... 100%];
RH – relative humidity sensor [0... 100%].
The air quality control will automatically regulate ventilation intensity in the
range of 20...70%. If necessary, the range may be adjusted.
If the minimum ventilation intensity is set to 0%, the air handling unit will be
allowed to turn off when the air quality in the room meets the required value.
However, the unit will turn on for a short time periodically every 2 hours (this is
congurable), to check the air quality in a room. If after checking, the air pollu-
tion does not exceed the set value, the air handling unit is switched off. How-
ever, if after checking the air quality is poor, the air handling unit will continue its
operation until the room is ventilated.
Control sequence. In the “Control sequence” advanced settings you can set
up to 3 levels of control, which will control the supply air temperature, i.e. rst
starts Stage 1, if it is not enough then Stage 2, and then Stage 3. Only the de-
fault Stage 1 control is activated in the factory for an electric heater – but you
can activate additional heaters/coolers, to coordinate their operating sequences
with each other or to completely turn them off.
To activate the additional hot water duct heater, you will need to select the
“external coil” and set its type to “hot water”. Selecting the “cold water” type
of external coil will activate the water cooling control. The external coil control
signal is output through the TG1 terminals (Fig. 1.3 b).
After activating the water heater, you must additionally con-
nect the water temperature sensor B5 to the controller ter-
minals.
Selecting “External DX unit” as a controllable feature will activate the control
of external outdoor DX unit. The control signal is output through the controller
terminals DX (Fig. 1.3 b).
2 Stage
External coil
External coil type
Hot water
3 Stage
External DX unit
Control sequence
1 Stage
Electric heater
Sensor 1
CO2
Min. intensivity
20%
Sensor 2
RH
Air quality control
Check period
2h
Max. intensivity
70%
Status
On

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Subnet mask
255.255.255.0
Connectivity
IP address
192.168.0.60
2.5. Control Panel C6.2
2.5.1
2.5.3
2.5.6
2.5.2
2.5.4
2.5.5
Fig. 2.5. C6.2 panel view
2.5.1. Operating mode selection
In the control panel C6.2, the user can choose only one of the usual operation modes:
Away. The recommended choice when you are not at home or when there are fewer people
inside the premises than usual. The ventilation intensity will be 20%.
Normal. Recommended when there is the usual number of people inside the premises. The
ventilation intensity will be 50%.
Intensive. The recommended choice when there are more people inside the premises than
usual. The ventilation intensity will be 70%.
Boost. The recommended choice when it is necessary to quickly ventilate the premises. The
ventilation will run at its maximum intensity.
The operation mode parameters are preset at the factory. For the modication of each of the mode pa-
rameters, if you have to change the temperatures or the air ows, you must have a connection to a computer
network or the Internet (see Sections 2.2, 2.3). Then the modications can be performed with a smart phone
or computer.
For more about the choice of modes, read Section 2.4.3.
Connectivity. Upon connecting the unit via a web browser, you must congure
the computer’s network settings: IP address and subnet mask.

C6-17-01
EN
UAB AMALVA we reserve the right to make changes without prior notice
18
2.5.2. „ECO“
An energy-saving mode to minimize the power consumption of the air handling unit. See more details in Sec-
tion 2.4.4..
2.5.3. AUTO mode
AUTO – automatic operation mode when the unit is operating and changing ventilation intensity based on the
chosen (pre-set) weekly operating schedule (for more details, see Section 2.4.6.2). If you connect air quality
sensors to the unit, then by pressing AUTO, the ventilation is automatically adjusted according to the current
air pollution in the room (see Section 2.4.6.3.).
2.5.4. Warning indicator
The indicator informs the user about dirty air lters or ventilation unit malfunctions.
2.5.5. Reset button
After the failure elimination or replacing the air lters, press the reset button and hold it for 5 seconds to remove
the fault message. If the fault message cannot be removed and the unit is not working, then follow the instruc-
tions in the troubleshooting tables (Section 2.6.).
2.5.6. Turning the unit on/off
Pressing the OFF button turns off the air handling unit. To activate the unit, press the same on/off button, or
choose one of the modes directly.
2.5.7. Keypad lock
By pressing the keys simultaneously and holding them for 5 sec., the keypad is locked and all keys will
become inactive. To unlock the keypad, perform a similar procedure.
2.6. Troubleshooting
If the unit is not working:
• Make sure that the unit is connected to the power supply network.
• Check all the automation fuses. If necessary, replace burned out fuses with new fuses that have the same
electrical parameters (the fuse types are listed in the principal wiring diagram).
• Make sure there is no fault message or indication in the control panel. If there is a problem, you must rst
remove the fault. To remove the fault, follow the instructions in the troubleshooting tables.
• If nothing is shown on the control panel, check for damage to the cable that connects the remote panel to
the unit.

C6-17-01
UAB AMALVA we reserve the right to make changes without prior notice 19
Table 2.6.1. Alarms displayed in the C6.1 control panel, their possible causes and elimination methods
Code Notication Possible cause Elimination
F1 Low supply air ow Too high resistance of the ventila-
tion system
Check the air valves, air lters or
ventilation system for clogging.
F2 Low extract air ow
F3 Return water temperature low
The temperature of the return water
in the water heater has dropped
below the acceptable limits
Check the condition of the circula-
tion pump on the heating system,
and the mixing valve actuator.
F4 Low supply air temperature Unlisted or uncontrollable heating
unit or insufcient power Check the heating unit
F5 High supply air temperature
F6 Electric heater overheat The heater has overheated due to a
too low air ow
After the heater has cooled down,
restore the protection by pressing
the RESET button
F7 Heat exchanger failure Blocked or not rotating rotor, by-
pass damper failure
Check the drive condition of the
rotary or the plate heat exchanger.
F8 Heat exchanger icing
Icing may occur in low outdoor
temperatures and in high room
humidity
Check the operation and protection
system of the initial electric heater.
F9 Internal re alarm Risk of re in the ventilation system Check the ventilation system. Find
the source of the heat.
F10 External re alarm Fire alarm from the building’s re
protection system
Once the re alarm signal disap-
pears, the unit needs to be restarted
immediately from the control panel.
F11 – F22 Temperature sensor(s) failure(s) Disconnected or faulty temperature
sensor(s)
It is necessary to check the sen-
sor connections or to change the
sensor.
F23 – F27 Controller failure Inner main controller failure Replace the main controller.
W1 Clogged air lters It is time to replace the air handling
unit air lters
Change the lters after turning off
the unit.
W2 Service mode A temporary mode, which can be
activated by the service personnel
The service mode is switched off by
simply deleting the alert message.
Table 2.6.2. Alarms displayed in the C6.2 control panel, their possible causes and elimination methods
Indication Operation Possible cause Elimination
Red light warning indicator The unit is operating Dirty air lters Change the lters after turning
off the unit.
Flashing red warning indicator The unit is operating A temporary mode, which can be
activated by the service personnel
The service mode is switched
off by simply deleting the alert
message.
Flashing red warning indicator The unit is not operating Critical failure(s) for which the unit
is stopped
More details about the fault
can be viewed online using the
computer or a smart phone.
All panel indicators are ashing N/A
Damaged or incorrectly connected
connection cable between the
remote control panel and the unit
Check the control panel con-
nection
Reset the emergency electric heater overheating protection system us-
ing the RESET button, only after clarifying the cause of the overheating
and eliminating it.
Before performing any work inside the equipment, make sure that the
machine is switched off and disconnected from the mains power supply.
Once the failure has been eliminated, activate the power supply and
erase the error message. However, if a fault is not eliminated, the device
will either start again and then stop, or will not start and the error mes-
sage will continue to be displayed.

C6-17-01
UAB AMALVA
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PARTNERS
AT J. PICHLER Gesellschaft m. b. H. www.pichlerluft.at
BE
Ventilair group www.ventilairgroup.com
ACB Airconditioning www.acbairco.be
CZ REKUVENT s.r.o. www.rekuvent.cz
CH
WESCO AG www.wesco.ch
SUDCLIMATAIR SA www.sudclimatair.ch
KAPAG Kälte-Wärme AG www.kapag.ch
DK
UNIQ COMFORT ApS www.uniqcomfort.dk
AIR2TRUST www.air2trust.com
EE BVT Partners www.bvtpartners.ee
FI MKM-Trade Oy www.mkm-trade.
FR AERIA www.aeria-france.fr
GB
Supply Air Ltd www.supplyair.co.uk
ELTA FANS www.eltafans.com
IR Fantech Ventiliation Ltd www.fantech.ie
IS Hitataekni ehf www.hitataekni.is
NL
Ventilair group www.ventilairgroup.com
Vortvent B.V. www.vortvent.nl
NO
Ventistål AS www.ventistal.no
Thermo Control AS www.thermocontrol.no
PL Ventia Sp. z o.o. www.ventia.pl
SE Caverion Sverige AB www.caverion.se
SI Agregat d.o.o www.agregat.si
SK TZB produkt, s.r.o. www.tzbprodukt.sk