Komfovent C5 User manual

C5.1
EN Electrical installation and Operation Manual

EN
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C5.1-20-05
2
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Improper handling of this type of waste could have a possible negative impact on the environment and human
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Content
1. ELECTRICAL INSTALLATION MANUAL..................................................................................................... 3
1.1. Air Handling Units Sections Connection..................................................................................................... 3
1.2. Electric Power Supply Connection............................................................................................................. 3
1.3. External Elements Connection................................................................................................................... 4
1.4. Temperature Sensors Installation............................................................................................................... 5
1.5. Requirements for the installation of the control panel................................................................................ 5
1.6. Control panel connection ........................................................................................................................... 5
2. OPERATION MANUAL................................................................................................................................... 6
2.1. Unit Control ................................................................................................................................................ 6
2.2. Control panel indication.............................................................................................................................. 6
2.3. Parameters overview ................................................................................................................................. 7
2.4. Operation modes selection ........................................................................................................................ 7
2.5. Menu .......................................................................................................................................................... 8
2.5.1. Overview.......................................................................................................................................... 8
2.5.1.1. Alarms................................................................................................................................. 8
2.5.1.2. Operation counters ............................................................................................................. 8
2.5.1.3. E󰀩ciency status.................................................................................................................. 8
2.5.1.4. Detailed information............................................................................................................ 8
2.5.2. Functions ......................................................................................................................................... 9
2.5.2.1. Air quality control ................................................................................................................ 9
2.5.2.2. Operation on demand ........................................................................................................ 9
2.5.2.3. Outdoor compensated ventilation .................................................................................... 10
2.5.2.4. Summer night cooling ...................................................................................................... 10
2.5.2.5. Minimum temperature control .......................................................................................... 10
2.5.2.6. Override function ..............................................................................................................11
2.5.2.7. Humidity control ................................................................................................................11
2.5.3. Scheduling ..................................................................................................................................... 12
2.5.3.1. Operation program ........................................................................................................... 12
2.5.4. Settings.......................................................................................................................................... 12
2.5.3.2. Holidays............................................................................................................................ 12
2.5.4.1. Air handling unit settings .................................................................................................. 13
2.5.4.2. Personalization ................................................................................................................. 14
2.6. Control of air handling units through a web browser................................................................................ 14
2.7. Additional control options ......................................................................................................................... 15
2.7.1. Combined water coil control .......................................................................................................... 15
2.7.2. Inverter direct evaporation cooler control ...................................................................................... 15
2.7.3. Multi-level control of direct evaporation cooler .............................................................................. 15
2.7.4. Reversal of direct evaporation coolers .......................................................................................... 16
2.8. Troubleshooting........................................................................................................................................ 16

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1. ELECTRICAL INSTALLATION MANUAL
Installation works can be performed only by the specialists that have required qualication. During installation
following requirements must be fullled.
It is recommended to lay control cables separately from power cables, or
use shielded cables. In such case it is necessary to earth cable shield-
ing!
Ak sa AHU používa vonku, všetky káble a vodiče, ktoré sú vedené mimo
jednotky, musia byť dodatočne chránené pred poškodením UV žiarením;
môže byť napríklad namontovaný vo vnútri káblového žľabu, vlnitej rúrky
alebo podobne.
1.1. Air Handling Units Sections Connection
After unit parts have been connected together (see unit installation instruction), unit sections connecting
cables and wires are connected.
Connector connection is performed strictly according to numeration giv-
en in wiring diagram, or adequate markings (see unit electric scheme).
When disconnecting unit sections, do not pull by connecting wires and
cables!
1.2. Electric Power Supply Connection
If the air handling unit voltage is ~230 V; 50 Hz it is necessar y to install the socket with grounding of correspond-
ing capacity (see electric diagram unit). If the voltage is ~400 V; 50 Hz, the cable of electrical power supply is
connected to the main switch, which is located on the unit’s outside wall. It is necessary to connect earthing!
Electrical power supply connection and other cable thicknesses are specied in the wiring diagram.
Air handling units designed for 400 V AC supply voltage must be con-
nected to the stationary installation by solid cable. All units must be
connected through circuit breaker with 300 mA current leakage protec-
tion (type B or B+).
Before connecting unit to the electrical power supply, it is necessary to
check whether earthing has been installed properly.

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1.3. External Elements Connection
The air handling unit is designed with external connection terminals which are located on the controller box,
inside the air handling unit. All external control elements are connected to the terminals.
1
2
1. Control panel connection
2. „Ethernet“ computer network or internet connection
1.3 a Picture. Controller with connection terminals
Total power of all external elements with 24 V supply may not exceed
15 W.
37 38 39 40 41 42 43 44 45 46 47 48
13 14 15 16 17 18 19 20 21 22
~24V
~24V
~24V
GND
0..10V
0..10V
0..10V
NO
NO
NO
NO
NO
C
C
FG1 DX
Indication
control
Cold water
Hot water
Cooling water
Heating water
pump
230V AC, 1A
pump 230V AC, 1A
mixing valve
mixing valve
actuator
actuator
Humidifier
Run
Alarm
Common
Common
Cooling control
TG3 TG2 TG1 S1S2
IN5 L
L
N
N
N
N
N
23 24
25 26 27 28 29 30 31 32 33 34 35 36
~24V
~24V
~24V
~24V
0..10V
0..10V
0..10V
0..10V
C
NTC
B5
B9 B8 B7 B6
MODBUS
RS485
connection
OVR control
Common
Return water
Supply air
temperature sensor
temperature sensor
Fire system
External stop
Control input
External control
B1
NTC
A
GND
IN4
IN3
IN2
IN1
B
N
N
N
N
12345678910 11 12
Water pump /
coil alarm
C
DX3 / Heating
DX2 / Cooling
DX1/ Start
Air damper
actuator
Supply air
pressure sensor
Exhaust air
pressure sensor
Air quality sensor
Humidity sensor
1.3 b Picture. External control elements connection

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1.4. Temperature Sensors Installation
The supply air temperature sensor B1 (1.4 a Picture) is mounted in the air duct in a projected place for it; after
cooler section (if provided). The minimal distance from the duct connection of the unit up to the sensor should
be not less than double diameter of the circular connection or a diagonal of rectangular connection.
The water temperature sensor B5 (1.4 b Picture) is mounted on the water pipe by screwing it into the pro-
vided hole. The sensor must be thermo insulated!
Supply air temperature sensor B1 Water temperature sensor B5
1.4 a Picture 1.4 b Picture
B
D
≥ 2D
+–
B1
1.5. Requirements for the installation of the control panel
1. The control console should be installed in a room where the following conditions are ensured:
1.1. ambient temperature: 0 ºC ... 40 ºC;
1.2. relative humidity range: 20 % ... 80 %;
1.3. protection against dripping of water (IP X0).
2. Control panel connection is provided through a hole in the back or bottom side.
3. The panel can be mounted on a ush mounting box or in any other place just screwing two holes on the
fastening surface.
Do not use any other type or size screws but those that are packed to-
gether for control panel mounting. Wrong screws may damage electron-
ics board.
1.6. Control panel connection
The control panel is connected to the controller box (see Picture 1.3 a). The length of the cable for connecting
the panel with the unit may not exceed 150 m.
Yellow (A) () White
(+) RedGreen (B)
Yellow(A)
(+) Red
Green (B)
()White Yellow (A) () White
(+) RedGreen (B)
Yellow(A)
(+) Red
Green (B)
()White
1.6 Picture. Control panel connection
Control panel connection and other cable thicknesses are specied in
the wiring diagram!
Remove protective screen tape, before mounting front cover on the con-
trol panel!

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Air humidier operation
Summer night cooling
mode
Weekly operation mode
Holiday operation mode
„Override“ mode
Alarm signal
Fan operation
Air ow increasing
by activated function
(see chapter Functions)
Air ow decreasing
by activated function
(see chapter Functions)
Energy recovery
operation
Air heater operation
Air cooler operation
2.1 Picture. Control panel
2.2. Control panel indication
Supply air
temperature
Extract air
temperature
Supply air volume
Extract air volume
Supply air humidity
Extract air humidity
Extract (room)
air quality
Explanation of the displayed symbols
2. OPERATION MANUAL
2.1. Unit Control
Air handling units control system ensures control of the physical pro-
cesses that are taking place inside the air handling unit.
Control system consists of:
• main controller module;
• circuit breakers and main switch;
• control panel, which can be installed in the convenient place for the
user;
• pressure and temperature sensors.
Control panel (2.1 Picture) is designed for remote air handling unit
control, setting and display of controller parameters.
ECONOMY 1
21,9 °C
21,3 °C
Temperature
16:30
Selection of
operation modes
Menu
Indication of unit operation
modes and functions
Main parameters
overview window
Switching between
overview windows
Time

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2.3. Parameters overview
The main parameters of the unit are indicated in four main windows of the panel: temperatures indication, air
ow, air quality (humidity) and energy saving.
All other unit parameters are presented in the menu “Overview” (see 9 page).
ECONOMY 1
16:30
90%
18 kW
Energy saving
Reset settings
ECONOMY 1
Supply air ow
1250 m3/h
Extract air ow
1250 m3/h
Setpoint
20 °C
Operation modes
COMFORT 1
COMFORT 2
ECONOMY 1
ECONOMY 1
SPECIAL
OFF
ECONOMY 1
60% RH
800 ppm
Air quality
16:30
ECONOMY 1
12500 m3/h
13100 m3/h
Air ow
16:30
ECONOMY 1
21,9 °C
21,3 °C
Temperature
16:30
ECONOMY 1
21,9 °C
21,3 °C
Temperature
16:30
2.4. Operation modes selection
Six operation modes are possible, one of them user can select directly from control panel main window:
• Two Comfort and two Economy modes, for each of them the user can set air ow and temperature.
• Special mode allows the user not only to set air ow and temperature, but also to select blocking or using
heating, cooling and other functions.
• OFF mode completely turns o󰀨 the unit.
When AHU is stopped, by pressing modes button, it is possible to start the unit on the last active ventilation
mode.
When starting CF type AHU for the rst time, it will be needed to perform heat exchanger calibration, which
is used for frost prevention function (See 2.5.1.3).
Temperature
ON?
OFF
Temperature
Start CF exchanger
calibration?
STARTING

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2.5. Menu
Menu of panel consists of the four points:
Functions Settings
Overview Scheduling
Menu
ECONOMY 1
21,9 °C
21,3 °C
Temperature
16:30
Alarms
Operation counters
Eciency status
Detailed information
Overview
2.5.1. Overview
Main air handling unit parameters are presented in
the main windows (Chapter 2.3). All other informa-
tion, relating to the operation of the unit, malfunctions
and e󰀩ciency status is detailed in overview menu.
Functions Settings
Overview Scheduling
Menu
2.5.1.1. Alarms
This menu displays the notication of existing faults.
After failure elimination (see chapter 2.8), mes-
sages are deleted by selecting “Delete”. By click-
ing on „History“ can be viewed up to 50 registered
alarms.
2.5.1.2. Operation counters
This menu displays operation time of the fans, the
consumed energy of the heater and how much en-
ergy was recovered by the heat exchanger.
2.5.1.3. E󰀩ciency status
Menu for the heat exchanger e󰀩ciency and energy
recovery monitoring in real time.
Also in this menu it is possible to start CF ex-
changer calibration, if it was not performed during
rst start of AHU. If calibration was successful and
“Calibrated” is shown – there is no need to start cali-
bration again. During calibration AHU will operate for
about 10 minutes on di󰀨erent ventilation intensities
while measuring internal pressure. Thus do not open
AHU doors, do not regulate duct system and do not
change any settings during CF calibration. If you wish
to stop calibration – turn o󰀨 the unit from the control
panel.
2.5.1.4. Detailed information
All temperature sensor readings, functioning of sepa-
rate air handling unit elements and other detailed in-
formation is available in this menu.
Operation counters
Air heater
121 kWh
Supply fan
873 h
Exhaust fan
875 h
Recovered energy
1440 kWh
21A
Electric heater overheating
3B
VAV calibration fail
Alarms
Delete History
Detailed information
Supply air ow
350 m3/h
1 / 3
Supply air temperature
21,9 °C
Extract air temperature
22,1 °C
Outdoor air temperature
16,6 °C
Water temperature
25,3 °C
Calibrated
CF exchanger calibration
Efficiency status
83%
Energy saving
90%
Energy recovery
4,1 kW
Heat exchanger efficiency

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2.5.2. Functions
In this menu item, the user can activate and set ad-
ditional unit functions.
blank box: function is not activated
gray box: function is activated, but currently not operating
blue box: currently operating function
Functions
1 / 2
Air quality
control
Operation on
demand
Outdoor compen-
sated ventilation
Summer night
cooling
Minimum tempera-
ture control
Functions Settings
Overview Scheduling
Menu
Reset settings
Enable
Setpoint 1
1000 ppm
Setpoint 2
880 ppm
Mode 1
COMFORT 1
Mode 2
COMFORT 2
Air quality control
Reset settings
Enable
Setpoint
1000 ppm
Operation on demand
2.5.2.1. Air quality control
Air quality control is designed according to:
• CO2sensor1 [0...2000 ppm];
• air quality sensor VOCq [0...100 %];
• air pollution sensor VOCp [0...100 %];
• relative humidity sensor [0...100 %];
• temperature sensor [0...50 ºC].
Depending on the type of the selected sensor, the value of the air quality
function to be maintained is set, and the air handling unit intensity will be adjusted
according to that value. Ventilation intensity will be increased automatically in the
case of deviation from the set value and decreased again when it is approached.
For example, if the unit is designed with the CO2maintenance function and is
equipped with a CO2sensor, after setting value 800 ppm, this set CO2level will
be maintained by adjusting ventilation intensity, i.e. ventilation intensity will be
increased if the CO2level grows and will be decreased when it returns to the
previous condition.
The function of air quality operates only if no other below function is
active at the same time:
• summer night cooling;
• min. temperature control;
• outdoor compensated ventilation.
2.5.2.2. Operation on demand
The air handling unit start-up function is designed to start the unit which currently
o󰀨, when one of the selected parameters has exceeded the critical limit.
The function provided for the start-up of the unit according to:
• room CO2 sensor;
• room air quality sensor VOCq;
• room air pollution sensor VOCp;
• room relative humidity sensor;
• room temperature sensor.
Operation on demand (start-up / shut-down) is performed by the same
sensor which is used in the control of the “Air quality function”.
A room sensor with the analogue output (0...10 V DC) should be de-
signed for this function.
1 Factory setting.

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2.5.2.3. Outdoor compensated ventilation
The ventilation compensation function adjusts the air volume depending on the
existing outdoor temperature. It is possible to enter four temperature points, with
two of them dening winter conditions and the other two dening summer condi-
tions. When compensation start and end points for both winter and summer sea-
sons are entered (it is also possible to enter only one of them, example only winter
compensation; in this case, the start and the end points of summer compensation
should be the same), the current ventilation intensity will be decreased in propor-
tion according to the outdoor temperature until it reaches the minimum possible
ventilation level of 20 %.
The ventilation compensation function does not operate when sum-
mer night cooling function is active. Reset settings
Enable
Winter stop
-15 °C
Summer start
25 °C
Winter start
5 °C
Summer stop
35 °C
Outdoor compensated ...
F1 – user-selected air ow (actual)
F2 – minimum air ow 20 %
W1 – winter compensation start point
W2 – winter compensation end point
S1 – summer compensation start point
S2 – summer compensation end point
2.5.2.4. Summer night cooling
Summer night cooling function is intended for energy saving during the summer
season: by utilizing the outside chill of night hours, it is possible to cool down
heated rooms, i.e. to remove excessive heat that accumulated in the room during
day hours.
Summer night cooling function can start at night (from 00:00 h to 06:00 h a.m.)
at any time, even when the air handling unit is not working and is in standby mode.
User can set indoor temperature, at which this function starts and stops.
When this function is active, the current ventilation level is switched to the
maximum ventilation intensity (100 %) and ventilation is performed only by means
of fans, i.e. at that time neither the air cooling nor the energy recovery functions
operate.
Summer night cooling function has an operating priority over the fol-
lowing functions: outdoor compensated ventilation and the air quality
function.
Reset settings
Enable
Start when indoor
25 °C
Stop when indoor
20 °C
Summer night cooling
Outdoor
temperature,
C
Ventilation
intensity,
%
Reset settings
Enable
Setpoint
15 °C
Minimum temperature ...
2.5.2.5. Minimum temperature control
In winter time the minimum temperature control function forcibly reduces the sup-
ply and extract air ow set by the user when the heater capacity available in the
unit is insu󰀩cient and/or heat recovery does not ensure minimally possible tem-
perature supply to the room. The user can set a separate supply air temperature
value so that when that value is not achieved, the intensity of the ventilation unit
starts to be reduced automatically. The air ow may be reduced to the minimally
possible ventilation intensity of 20 %.
During the summer, when the air handling unit provided with cooler, this func-
tion according to the same user-set value limits the cooling capacity, thus ensuring
the minimum possible temperature supply to the room.
In ventilation intensity control, this function has top priority over “Out-
door compensated ventilation” and “VAV” functions.

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2.5.2.6. Override function
Override (OVR) control of the unit can be performed by the external contact
(see Picture 1.3 b) or device (timer, switch, thermostat, etc.). The received signal
from the outside activates the OVR function, which ignores the current operation
modes of the unit and performs one of the selected actions listed below:
• switches o󰀨 the air handling unit;
• switches over the unit to operation according to the mode “Comfort1”;
• switches over the unit to operation according to the mode “Comfort2”;
• switches over the unit to operation according to the mode “Economy1”;
• switches over the unit to operation according to the mode “Economy2”;
• switches over the unit to operation according to the mode “Special”;
• switches over the unit to operation according to the weekly schedule. Reset settings
Enable
Override
If on
Mode
ECONOMY 1
Override function
2.5.2.7. Humidity control
Humidity control function is designed for maintenance of air humidity determined
by the user. For proper operation of the function one or two additional humid-
ity sensors shall be connected, depending on where humidity will be maintained.
There are two modes for maintenance of humidity:
• Supply air. The determined humidity of supply air is maintained, using the
supply air duct humidity sensor (B9).
• Room air. The determined humidity of indoor air is maintained, using the room
air or exhaust air duct humidity sensor (B8). The supply air humidity limit is set
using the duct humidity sensor or hydrostat (B9).
One of the below methods can be chosen for maintenance of the determined
humidity:
• Humidication of air. There is a control signal of 0...10 V, directly reecting
the capacity of the humidier from 0 to 100 %. If humidication is required, the control is transferred through
the output TG3 of the controller.
• Dehumidication of air. There is a control signal of 0...10 V, directly reecting the capacity of the dehu-
midier from 0 to 100 %. If dehumidication is required, the control is transferred through the output TG3
of the controller.
• Dehumidication of air: cooling-heating. Dehumidication is performed using the coolers and heaters
available in the air handling unit. If there are several coolers and heaters, then it shall be pre-determined
which of them will be used in the dehumidication process.
• Humidication and dehumidication of air. For humidication of air the control signal of 0...10 V is used
through the output TG3 of the controller, and the dehumidication of air is performed using the coolers and
heaters available in the unit.
If the maintenance of the room air humidity is provided for, then the hu-
midity function will prevail over the air quality and recirculation functions,
i.e. when humidication or dehumidication is required, these functions
will be blocked.
Humidity control function must be ordered in advance.
Reset settings
Enable
Setpoint 1
55% RH
Mode 1
COMFORT 1
Setpoint 2
30% RH
Mode 2
ECONOMY 2
Humidity control
The OVR function provides for three operation modes selectable depending on the needs of the user:
1. The mode “When on” – the function will respond to the external control contact only when the air handling
unit is on.
2. The mode “When o󰀨” – the function will respond to the external control contact only when the air handling
unit is o󰀨.
3. The mode “Always” – the function will respond to the external control contact irrespective of the operating
condition of the unit.
The OVR function has the top priority and, therefore, ignores all previ-
ous modes. The function remains active as long as the external control
contact is in the closed position.

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2.5.3. Scheduling
Menu for planning of the air handling unit operation
according to the weekly program and the annual cal-
endar.
Scheduling
Operation program
Holidays
Functions Settings
Overview Scheduling
Menu
2.5.3.1. Operation program
User can set up to twenty operation programs for the
unit. For each program possible to adjust the mode
of operation, day of the week and the time interval.
2.5.3.2. Holidays
Holiday schedule species the time period during
which the unit operates under selected mode. Pos-
sible to set up to ten holidays.
Program 2
Operation mode
COMFORT 1
Weekdays
Mo/Tu/We/Th/Fr/Sa/Su
Start time
00:00
Stop time
24:00
Delete program
Holidays 2
Operation mode
STANDBY
From
12/14
Till
12/26
Delete holiday
Holidays
Holidays 1
Add new holidayAdd new program
Enable
Program 1
Operation program
2.5.4. Settings
This menu is for air handling unit and the user param-
eter setting.
Air handling unit
Personalization
Settings
Functions Settings
Overview Scheduling
Menu

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2.5.4.1. Air handling unit settings
Temperature control
The air handling unit provides for several temperature control modes:
• Supply. The unit supplies air according to the temperature preset by the user.
• Extract. Unit automatically supplies air of such temperature to maintain preset
exhaust air temperature.
• Room. Operation is similar to the mode “exhaust” but temperature is main-
tained by the sensor mounted in the room (B8).
• Balance. Supply air temperature maintenance value will be determined auto-
matically from the existing exhaust air temperature, i. e., what temperature air will
be removed from the premises, the same temperature air will be supplied back.
When “Balance” is selected, the temperature setpoint disappears.
Air volume control
Supply and exhaust air volumes control modes have been provided in the unit:
• CAV – constant air volume control mode. The unit will supply and extract a constant air ow which is preset
by the user, irrespective of any changes occurring in the ventilation system;
• VAV – variable air volume control mode. The unit will supply and extract an air ow with regard to the
ventilation needs in di󰀨erent rooms. In case of frequently changing ventilation demands this air volumes
maintenance mode signally reduces unit exploitation costs.
It is possible to use a simplied VAV control function, “single-ow VAV control”. It means that the perfor-
mance of this function requires only a single air ow pressure sensor, which is installed in a variable air duct
system (e. g. in supply air). This variable system is called the master ventilation system, according to which
control is performed, while the other air ow (in this case, discharged air) operates as the slave ventilation
system and always follows the master one. If the supply air requirement in the ventilation system which is
assigned as the master system decreases, the intensity of discharged air in the slave system is reduced
correspondingly by the same percentage.
If the variable air volume control function is mode is selected, the initial
calibration of the control mode must be performed; otherwise, the unit
will not operate if the VAV mode is selected.
Variable air volume control mode calibration:
1. Before start of calibration the air distribution and exhaust devices in ventilation system should be adjusted,
all valves for variable air ow in a way enabling air supply to all ventilated premises should be opened.
2. After switch on of the unit the VAV mode should be selected and calibration procedure should be conrmed.
After the end of the calibration, depending on the conguration of pressure sensors, VAV mode status will
change to Supply, Extract, Double.
3. After calibration the air handling unit further will operate in the previous mode.
• DCV– direct 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 1000 m3/h, setpoint in the
panel – 800 m3/h, and the B6 input value – 7 V, the unit will supply constant air volume of 560 m3/h, i. e.,
70 % of the set value. The same applies to the exhaust air only by B7 input.
Reset settings
Air handling unit
Temperature control
Flow control
Time/Date
Connectivity

EN
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C5.1-20-05
14
Personalization
Language
English
Flow units
m3/h
Screen saver
On
Panel lock
O
Touch sound
Click
2.6. Control of air handling units through a web browser
You may not only monitor the operation of air handling units and the functionality of their individual components,
change settings and activate extra functions by means of control panel but also by your computer. All you need
is to connect the unit to the computer, local area network or the Internet using a network cable.
Standard CAT 5 network cable
Time / Date
Time and date is required for air handling unit operation planning.
Also it is possible to activate automatic daylight saving time.
Enable
Daylight saving time
Time/Date
Time
09:40
Day/Month
25/05
Year
2019
Daylight saving time
On
Connectivity
• IP address and subnet mask. Setting is required when air handling unit is connected to PC network or
Internet.
• Controller ID. Number that identies the controller, when several air handling units are connected to com-
mon network and controlled by one control panel.
• RS-485. Settings of external RS-485 interface (1, 2, 3 terminals, picture 1.3 b).
2.5.4.2. Personalization
In this item for the user are presented menu language, measurement units and
other control panel settings.

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C5.1-20-05 15
How to connect the unit directly to your computer:
1. Plug one end of the network cable into the controller port on the unit (see Picture 1.3 a) and the other end
to the computer.
2. Go to the properties of your network card and enter IP address, e.g. 192.168.0.200, and subnet mask
255.255.0.0.
3. Open the web browser on your computer and disable all proxy servers in the settings.
4. In the address bar of your web browser enter the IP address associated with the air handling unit; the default
IP address is 192.168.0.50. You can change it at any time on the control panel or from web browser (see
connection settings).
Note: It is recommended to download the latest version of your web browser before use.
5. If the connection is successful, a window prompting to enter your user name and password appears:
Note: the user name is “user”. The default password is also “user”; after logging in, the user can later change
the password to any other of his/her choice (see user interface settings).
If the user has forgotten the modied password, it can be set to the de-
fault. To do this, user should to restore the factory settings of the air
handling unit.
2.7. Additional control options
2.7.1. Combined water coil control
For the air handling unit with the combined water coil (Combi-coil – heater and cooler in one) the control of the
mixing valve actuator is provided both under the air heating and cooling modes. The actuator is connected to
the control terminals of the heating circuit and operates only under the heating mode by default. However upon
transfer of the feedback signal conrming that there is cold water within the circulation system to the control ter-
minals (IN4) of the external control (e. g., by connecting additional device: thermostat, switch, etc.), the air cool-
ing function will be activated, and the mixing valve actuator (TG1) will be controlled under the air cooling mode.
2.7.2. Inverter direct evaporation cooler control
By default all units are provided with inverter type DX cooler control, which allows stepless control of the com-
pressor. For the inverter unit power control, there is a modulated signal (TG2), as well as signals: cooler start
(DX1), cooling demand DX2, heating demand DX3 (see Pic. 1.3 b).
There are three di󰀨erent control methods:
1. Universal control, suitable for most cooler units1.
2. Control adapted to Panasonic cooler units.
3 Control adapted to Daikin cooler units.
2.7.3. Multi-level control of direct evaporation cooler
For air cooling in the air handling unit there is provided 3 control contacts (connection is shown in Picture 1.3 b).
Depending on how much will be cooling steps and how it will be divided on steps, it is recommended to select
theoptimal control method. If the capacity of all steps is the same, then only three control steps are possible.
If cooling capacities of steps are close to ratio 1-2-4 (the capacity of each of the following steps is double the
previous), then cooler control will be realized with seven cooling steps.
Example: To the terminals DX1 is connected 1kW cooler, to DX2 – 2kW and to terminals DX3 connected
cooler with 4kW capacity. Control will be in steps:
1: 1 kW; 2: 2 kW; 3: 1 kW + 2 kW; 4: 4 kW; 5: 1 kW + 4 kW; 6: 2 kW + 4 kW; 7: 1 kW + 2 kW + 4 kW.
1 Factory setting.

EN
UAB KOMFOVENT we reserve the right to make changes without prior notice
C5.1-20-05
16
The function of step rotation is provided, when capacities of coolers are
the same.
The number of direct evaporation cooling units must be provided in ad-
vance.
2.7.4. Reversal of direct evaporation coolers
There is a reverse option of direct evaporation coolers, i.e. when the cooler is switched to the heating mode. In
such case, there must be only max 3 cooling control steps. There are control terminals DX3 for connection of
the cooler reversing signal “Heating” (Pic. 1.3 b.).
The option of reversal of direct evaporation cooling units must be pro-
vided in advance.
2.8. Troubleshooting
If the unit fails to operate:
• Make sure that the unit is connected to the power supply network.
• Check whether the main switch (if designed) is turned on.
• Check all fuses of the automatics. If necessary, replace blown-out fuses with new ones having the same
electrical parameters (the sizes of the fuses are indicated on the schematic electrical diagram).
• Check whether there is any failure message on the control panel. If there is indication, it needs to be elimi-
nated rst. In order to eliminate the failure, follow the table.
• If nothing is indicated on the control panel, check whether cable connecting control panel with the unit is
not damaged.
2.8 Table. Alarms indicated on the control panel, their possible causes and elimination methods
Code Message Possible cause Elimination
14B Service time
If unit continuous operation (without
breaks) was 12 months, then periodic
inspection message appears.
After disconnecting the unit from power
supply, it is necessary to carry out peri-
odic inspection of the unit, i.e. to check
the condition of the heat exchanger,
the heater and fans.
1B, 19A Low supply air ow Too high resistance of the ventilation
system.
Check pressure pipes, air dampers, air
lters and make sure that the ventila-
tion system is not blocked.
2B, 20A Low extract air ow Too high resistance of the ventilation
system.
Check pressure pipes, air dampers, air
lters and make sure that the ventilation
system is not blocked.
3B VAV calibration fail Pressure sensors are not connected
or broken.
Check connections of the sensor or
replace the sensor.
4B Change outdoor air lter The fresh air lter is blocked. Shut down the unit and replace the
lter.
5B Change extract air lter The extract air lter is blocked. Shut down the unit and replace the
lter.
6B-11B Electric heater o󰀨 The heater is disconnected due to too
low air volume.
As soon as the heater cools down,
protection resets automatically. It is
recommended to increase the ventila-
tion intensity level.
113B,114B CF exchanger not
calibrated
CF exchanger calibration not perfor-
med or failed
Make sure that all doors are closed,
there is no obstructions in the ducts
and AHU can reached airow setpoint
of COMFORT 1 mode. Repeat cali-
bration manually (see 2.5.1.3.).
127B Service mode Temporary mode, which can be acti-
vated by the service personnel.
The service mode is switched o󰀨 by
simply deleting the alert message.

UAB KOMFOVENT we reserve the right to make changes without prior notice
C5.1-20-05 17
Code Message Possible cause Elimination
1A, 2A Supply air temperature
sensor failure
The supply air temperature sensor is
not connected or broken.
Check connections of the sensor or
replace the sensor.
3A, 4A Extract air temperature
sensor failure
The discharged air temperature sensor
is not connected or broken.
Check connections of the sensor or
replace the sensor.
5A, 6A Outdoor air temperature
sensor failure
The external air temperature sensor is
not connected or broken.
Check connections of the sensor or
replace the sensor.
7A, 8A Exhaust air temperature
sensor failure
The exhaust air temperature sensor is
not connected or blocked.
Check connections of the sensor or
replace the sensor.
9A, 10A Water temperature sen-
sor failure
The water temperature sensor is not
connected or broken.
Check connections of the sensor or
replace the sensor.
11A Return water tempera-
ture low
Return water temperature of the heater
dropped below the permissible limit.
Check the status and operation of the
circulation pump, heating system and
mixing valve actuator.
12A Internal re alarm Fire danger in the ventilation system. Check the ventilation system. Find the
source of the heat.
13A External re alarm
A re signal has been received from
the re signalization system of the
building.
Delete alarm message and restart the
unit when the re signal disappears.
14A External stop
A signal from an external device
(switch, timer, or sensor) has been
received.
As soon as the auxiliary device is
switched o󰀨, the unit will operate in the
previous mode.
15A Heat exchanger failure Blocked or not rotating rotor, by-pass
damper failure.
Check the rotor drive, replace the
belt or check the by-pass channel
operation.
16A Heat exchanger icing Icing may form under a low outdoor
temperature and high room humidity.
Check the operation of the rotation
heat exchanger drive or the air bypass
damper of the plate heat exchanger.
17A Low supply air tem-
perature
The heating equipment fails to operate
or its capacity is insu󰀩cient. Check the heating equipment.
18A High supply air tem-
perature
The heating equipment is not control-
lable (mixing valve or contactor is
blocked).
Check the heating equipment.
21A-23A Electric heater overheat The emergency overheating protection
of the electrical heater has actuated.
Protection can be reset only by press-
ing the RESET press-button on the
heater.
24A, 25A Evaporator air tempera-
ture sensor failure
The evaporator air temperature sensor
is not connected or broken.
Check connections of the sensor or
replace the sensor.
46A CF exchanger not
calibrated
CF calibration failed and there is a risk
of exchanger freezing
Make sure that all doors are closed,
there is no obstructions in the ducts
and AHU can reached airow setpoint
of COMFORT 1 mode. Repeat
calibration manually (see 2.5.1.3.).
15B Evaporator icing
The evaporator is iced over due to
excessively high humidity content
in the exhaust air and low outdoor
temperatures.
Check the operation of the evaporator
defrost system.
12B High pressure on
compressor
Compressor system operated in an
overload mode as a result of too high
temperature in the condensing unit.
Indentify the cause and eliminate it.
13B Low pressure on com-
pressor
Compressor system is leaky or the
amount of refrigerant is insu󰀩cient. Indentify the cause and eliminate it.

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UAB KOMFOVENT we reserve the right to make changes without prior notice
C5.1-20-05
18
Code Message Possible cause Elimination
16B-18B, 28A-30A Compressor failure
No power supply.
Check supply voltage on the circuit
breaker and/or make sure whether
it is on.
Supply voltage mismatches.
Check that the supply voltage is on all
three phases, if necessary, swap the
two phase conductor positions.
Compressor motor failure. Check the compressor motor and
replace it if necessary.
Compressor drive failure. Check the operation of the compressor
drive and replace it if necessary.
99A Supply fan drive failure A fault signal has been received from
the supply fan drive.
Check the supply fan drive and its
messages.
100A Supply fan drive
overload The supply fan drive is overloaded. Check the condition of the supply fan drive and its cooling.
101A Supply fan motor failure The supply fan is broken. Check the supply fan and replace it if
necessary.
102A, 103A Supply fan motor
overload The supply fan is overloaded.
Check the condition of the supply fan
and make sure that the resistance of
the ventilation system is not exceeded.
104A Exhaust fan drive failure A fault signal has been received from
exhaust fan drive.
Check the exhaust fan drive and its
messages.
105A Exhaust fan drive
overload The exhaust fan drive is overloaded. Check the condition of the exhaust fan drive and its cooling.
106A Exhaust fan motor
failure The exhaust fan is broken. Check the exhaust fan and replace it if necessary.
107A, 108A Exhaust fan motor
overload The exhaust fan is overloaded.
Check the condition of the exhaust fan
and make sure that the resistance of
the ventilation system is not exceeded.
109A Rotor drive failure A fault signal has been received from
the rotor drive.
Check the rotor drive and its mes-
sages.
110A Rotor drive overload The rotor drive is overloaded. Check the condition of the rotor drive
and its cooling.
111A Rotor motor failure The rotor motor is broken. Check the rotor motor and replace it if
necessary.
112A, 113A Rotor motor overload The rotor motor is overloaded.
Check the condition of the rotor motor
and make sure that the rotor is not
blocked.
114A-124A Communication error
No communication with the internal
components of the air handling unit
(controller extension modules, fre-
quency converters, fans, etc.) or one /
several of them are broken.
Check internal connections and func-
tioning of separate components.
125A, 127A Controller failure Main controller module fault. Replace the main controller.

UAB KOMFOVENT we reserve the right to make changes without prior notice
C5.1-20-05 19
The emergency protection of the electrical heater against overheating
can be reset with the RESET button only if the cause of the overheating
of the heater has been claried and eliminated.
If the unit is shut down and a failure text message is shown on the control
panel, the fault must be eliminated!
Before performing any jobs inside the unit make sure that the unit is
stopped and disconnected from the electrical power supply.
After failure has been eliminated and power supply connected the error messages should be deleted. How-
ever if the failure has not been eliminated, unit either starts operating and after some time it stops again, or it
does not operate and failure message is indicated.

C5.1-20-05
UAB KOMFOVENT
TECHNINĖS PRIEŽIŪROS SKYRIUS /
SERVICE AND SUPPORT
Tel. [phone]
[email protected]
ООО «КОМФОВЕНТ»
Россия, Москва
ул. Выборгская д. 16,
стр. 1, 2 этаж, 206 офис
Тел. [phone]
[email protected]
www.komfovent.ru
ООО «КОМФОВЕНТ»
390017 г. Рязань
Ряжское шоссе, 20 литера Е, пом Н6
Тел.: [phone]
[email protected]
www.komfovent.ru
ИООО «Комфовент»
Республика Беларусь, 220125 г. Минск,
ул. Уручская 21 – 423
Тел. [phone]
[email protected]
www.komfovent.by
Komfovent AB
Ögärdesvägen 12B
433 30 Partille, Sverige
Tel. [phone]
[email protected]
www.komfovent.se
Komfovent Oy
Muuntotie 1 C1
FI-01 510 VANTAA
Tel. [phone]
info_@komfovent.com
www.komfovent.com
Komfovent GmbH
Konrad-Zuse-Str. 2a, 42551 Velbert,
Deutschland
Tel. [phone]
[email protected]
www.komfovent.de
SIA Komfovent
Bukaišu iela 1,
LV-1004 Riga
Tel. [phone]
[email protected]
www.komfovent.lv
www.komfovent.com
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
CLIMAIR GmbH www.climair.ch
DK Øland A/S www.oeland.dk
EE BVT Partners www.bvtpartners.ee
FR AERIA www.aeria-france.fr
GB ELTA FANS www.eltafans.com
HR Microclima www.microclima.hr
HU
AIRVENT Légtechnikai Zrt. www.airvent.hu
Gevent Magyarország Kft. www.gevent.hu
Merkapt www.merkapt.hu
IR Fantech Ventilation Ltd www.fantech.ie
IS
Blikk & Tækniþjónustan ehf www.bogt.is
Hitataekni ehf www.hitataekni.is
IT Icaria srl www.icariavmc.it
NL
Ventilair group www.ventilairgroup.com
DECIPOL-Vortvent 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 Nordisk Ventilator AB www.nordiskventilator.se
SI Agregat d.o.o www.agregat.si
SK TZB produkt, s.r.o. www.tzbprodukt.sk