 OPERATING
 INSTRUCTIONS

                OPTIMA 270

                                    SW 1.5

THE AIR WE BREATHE
CONTENTS

1. Installation of Optima Basic............................................................................................................................................3
2. Installation of Optima Touch............................................................................................................................................4
3. Programming the Optima 270 control unit................................................................................................................5
4. Control panel..........................................................................................................................................................................6
5. Start..........................................................................................................................................................................................8
6. Control unit menu.................................................................................................................................................................9
7. Control unit settings........................................................................................................................................................10
8. Further explanations of humidity and district heating control.......................................................................21
9. Maintenance........................................................................................................................................................................25
10. Troubleshooting..............................................................................................................................................................26

2 		
 1. INSTALLATION OF OPTIMA BASIC

   1.1 Installation

   The Optima Basic control panel is intended to be mounted
   on a flat wall.

   1.2 Assembly

   Find the place on the wall where you want to attach the
   control panel and mark the location of the screw holes.
   At least two screws must be used to secure the control
   panel to the wall. The type of wall will determine the
   method for drilling holes, the hole size and the correct
   screws for fixing the panel.

   When the control panel is securely mounted on the wall,
   take the Optima Basic panel, which comes with a pre-
   installed cable, and pass this cable through the opening in
   the casing, as shown in the picture.

   Secure the cable to the casing with a cable tie as shown to
   prevent the cable from being pulled out of the clamp in the
   display.

   Please note: If the pre-installed 1.8 metre Optima Basic
   cable is not long enough, it is possible to replace this with a
   4-core 0.25 mm2 twisted pair cable with a length of up to
   50 metres.

   Attach the control panel to the casing using four screws as
   shown in the picture.

   Complete the installation by carefully snapping the plastic
   cover onto the casing as shown in the picture.
   Please note: The control panel can installed flush with the
   wall using an integrated Euronorm box.

   To remove the control unit, click off the plastic cover and
   remove the screws.

   For further information about connecting the control panel
   to the Optima 270, refer to the electrical diagram in the
   installation manual.

 Important information

   Safety information

   This appliance can be used by children aged 8 and over and
   by people with reduced physical, sensory or mental
   capabilities or lack of experience and knowledge, as long as
   they are supervised or have been instructed in the safe use
   of the appliance and understand the hazards involved.
   Children must not play with the appliance. Children must
   not clean or maintain the appliance without supervision. We
   reserve the right to make design or technical changes.

		3
2. INSTALLATION OF OPTIMA TOUCH

2.1 Installation

The Optima Touch control panel is intended to be mounted
on a flat wall.

2.2 Assembly

Find the place on the wall where you want to attach the
control panel and mark the location of the screw holes. At
least four screws must be used to secure the bracket to the
wall. The type of wall will determine the method for drilling
holes, the hole size and the correct screws for fixing the
panel.
Once the bracket is securely mounted on the wall, take the
Optima Touch display, which comes with a pre-installed
cable, and carefully click the display onto the bracket. Make
sure the cable is carefully routed as shown in the picture
before mounting the display.
Please note: If the pre-installed 1.8 metre cable is not long
enough, it is possible to replace this with a 4-core 0.25
mm2 twisted pair cable with a length of up to 50 metres.
To remove the display, gently press the plastic clip (locking
mechanism) as shown in the picture.
For further information about connecting the control panel
to the Optima 270, refer to the electrical diagram in the
installation manual.

4 		
 3. PROGRAMMING THE OPTIMA 270
    CONTROL UNIT

    The control system is preset from the factory, which means
    that the unit can be put into operation without changing the
    operating settings. The factory setting is a default setting
    that can be adapted to the operating preferences of the
    home in question to ensure optimal utilisation and
    operation of the system.

    Depending on the product's configuration, it is possible to
    connect Optima displays directly to I/O connectors outside
    the product (connector labelled ‘display’) or directly on the
    printed circuit board.

    The I/O interface includes terminals for connecting both
    Modbus Master (e.g. CTS systems) and Modbus Slave
    devices (e.g. district heating or fire box PCB). To expose the
    connectors, carefully remove the dust shield sticker.

   3.1 System without display interface

    3.1.1. Connect an Optima Touch display to the Optima 270
    and adjust the settings as needed. Remove the Optima
    Touch control panel when programming is complete. The
    Genvex ventilation system will continue to operate
    according to the new parameters that have been set.

    3.1.2 Use the Genvex PC tool to adjust the Optima 270
    parameters. Connect a laptop to the IO interface via the
    Optima Basic or Touch display and use the PC as an
    interface for programming the Optima 270, or connect it
    directly to the micro-USB connector on the Optima 270
    circuit board.

   NB PC tools are only available to installers.

    Optima Basic and Touch displays can be retrofitted to this
    type of installation if required.

   3.2 Installation with Optima Basic display

    See details in 1.0.

   3.3 Installation with Optima Touch display

    3.3.1. Connect an Optima Touch control unit to the Optima
    270 and adjust the settings as needed.

    NOTE: The Optima 270 control unit parameters can be
    saved on the Optima Touch for one ventilation system and
    transferred to a similar system by using ‘EA1 Save’ and
    ‘EA2 load settings’ to save and load the settings,
    respectively.

		5
4. CONTROL PANEL                                               Button D:
                                                               • Press to increase the fan
Optima Basic user interface
                                                                 speed to level 3 for 30
  Button A:                                                      minutes (time can be set in
  • P ress to activate/deactivate                               menu A3).

     reheater (if connected)
  • Press and hold to enable/

     disable humidity control.

  Button B:
  • P ress and hold for 5 seconds

     to reset filter timer.
  • Press and hold for 10

     seconds to clear any errors
     and reboot the system.

  Indicators, LED lights                                          Button C:
  • When the LED light is on, the function is activated/on.       •	Press to change the fan speed.
  • When the LED light is off, the function is disabled/off.     •	If the LED lights are off, the
  • Flashing LED lights indicate that the function is active.
                                                                      fans are off.
For more information on red LED alarm codes, refer to
Troubleshooting in Section 6.                                  To enable to switch off the ventilation
                                                               system, set menu EC9 to ON.

6 		
Optima Touch user interface – main display

Press to change fan speed                       Press to change the  If the top bar is yellow = filter alarm
The actual speed will be shown by coloured      room temperature     (display stays illuminated):
blades indicating fan speed levels 1–4.         setpoint (affects    Change filter. Reset the filter alarm by
Standby is only displayed when the EC9 menu     the opening of       pressing the bar.
is set to ON. Please note that there will be a  summer bypass for    If the top bar is red = alarm:
delay of 3–4 minutes before the fans turn off.  room cooling, etc.)  See in alarm under the ‘I’ button.
                                                                     Grey bar = normal operation.

                                                                             Information bar
                                                                             showing date and
                                                                             time. Any errors
                                                                             will be displayed
                                                                             here.

                                                                             Tap to access
                                                                             status
                                                                             information, alerts
                                                                             and event log
                                                                             menu.

Boost function: Press to         Press to lock the display for 5 seconds                  Press to go back
increase the fan speed to level  (time can be changed in menu D). The                     to the previous
3 for 30 minutes (time can be    external surfaces can be wiped gently with               menu.
set in menu A3).                 a cloth soaked in 70% isopropyl alcohol.
                                                                             Press to access the
                                                                             user and service menu.

		7
5. START

5.1 Optima Touch user interface – first use                 5.2 Optima Touch user interface – screen saver

The following information will be displayed during the      Depends on the screen saver settings in D – Display menu.
initial startup of the control unit for the Optima 270      The display will revert to the screen saver after 2 minutes.
ventilation, when the Optima Touch is connected to the      If D2 is set to 0, the screen saver will be permanently
control unit.                                               active. If a time is set in D2, the screen saver will change to
Wait approximately 1 minute for the initial boot sequence   a blank display after the set time.
to complete.
                                                            To access the main menu again, gently press the display for
Control unit software version: the actual software version  2 seconds until the display reactivates.
of the Optima 270 control unit.
                                                            Current time                             Current indoor and outdoor
Software version, display: the actual software version of   and date                                 temperature. Based on local
the display.                                                                                         measurements in the
                                                                                                     ventilation unit (outdoor air
Device-ID: ID of the control unit's secure communication                                             and extract air).
protocol for internet connection.

IP address: Only displayed if the ventilation unit is
connected to a router via RJ45 connection.

Internet connection status: Indicates whether the internet
connection is on or off. If the status indicates ‘off,’ no
connection can be made via the Genvex Connect app or
remote monitoring/remote servicing.

                                                                                       Screen saver
8 		
 6. CONTROL UNIT MENU

   6.1Structure, user and service menu in Optima
       Touch

    The structure of the user and service menu in the Optima
    Touch display is divided into the following sections:
    A – User: main user settings
    B – S cheduler: schedules for changing fan speeds and

        temperature settings
    C – Date/Time: date and time settings on info display and

        for time stamping events in the log
    D – Display: settings for display and access to parameters
    E – S ervice: service menu – please note that this menu

        should be used primarily by technicians familiar with the
        operation of the machine.

		9
7. CONTROL UNIT SETTINGS

Menu                  Description                                                                  Factory setting
A1 – Reheating                                                                                     (max./min. values)

A2 – H umidity       If a reheater is fitted in the system, you can choose whether the heater     A1: Off
      control         should be activated. If the setting is set to OFF, the heater will not turn  (On/Off)
                      on even when required. If the setting is set to ON, the heater will start
A3 – Boost time       as needed. This is regulated in accordance with the temperature set in
A4 –Timer levels 3   point 1 of the user menu.

      and 4 – On/Off  Humidity control is activated. This must be set to ON                        A2: Off
                      to be active.                                                                (On/Off)
A5 –Timer levels 3
      and 4 – hours   Set the desired time for temporarily increased fan speed, activated via A3: (30–1000 min)

B1 – F an scheduler  the boost button on the main display.                                        (1–120 min)

B2 – Temperature     When the ventilation system is set to fan speed levels 3 and 4, the          A4: Off
      scheduler       system will automatically revert to fan speed level 2 after the number       (On/Off)
                      of hours set in A5 when this setting is set to ON. If the setting is set
B3 – E nable         to OFF, the system will run at level 3 or 4 until the fan speed level is
      Scheduler       changed manually.

B4 –Alternative      If A4 is activated, you can specify how many hours the system should         A5: 3 hours
     Temp.            run at level 3 or 4 before it automatically reverts to level 2.              (1–9 hours)

C1 – Time             Four separate timers can be set to change the fan speed level each day.      B1: Not in use
C2 – Date             The scheduler can be adjusted separately for each day of the week if         Not in use/Fan speed
C3 – Daylight        necessary. To use the same values for all days of the week, the schedule     levels 1–4/Standby)
                      can be copied by pressing the ‘apply to all days’ button.
      Saving Time
                      Four separate timers per day can be set to adjust to a lowered nominal       B2: Not in use
                      temperature (e.g. for earlier opening of the bypass at night during the      Not in use/Reduced/
                      summer). The scheduler can be adjusted separately for each day of the        Normal)
                      week if necessary. To use the same values for all days of the week, the
                      schedule can be copied by pressing the ‘apply to all days’ button.

                      It is possible to activate/deactivate the fan schedule set in B1 and the     Fan scheduler: Off
                      temperature schedule set in B2.                                              (On/Off)
                                                                                                   Temperature
                                                                                                   scheduler: Off
                                                                                                   (On/Off)

                      Allows you to adjust the lowered temperature setpoint selected in B2.        B4: 0°C
                      The temperature selected here will be an offset from the temperature         (-10 to +10)
                      selected in the main menu ‘requested temperature’.

                      Setting the time (important for error handling)                              -

                      Setting the date (important for error handling)                              -

                      Automatic change between Daylight Saving Time/winter time                    C3: On
                                                                                                   (On / Off)

10 		
Menu                 Description                                                                 Factory setting
                                                                                                 (max./min. values)
D1 – Language        The language on the display can be changed.
                                                                                                 D1: English
D2 – S creen saver  Idle time before the screen saver is activated.                             (English/Dansk/
      time           0 = screen saver permanently on                                             Deutsch/Svenska)
                     Activate lock time by touching the lock symbol on the main display.
D3 – D isplay lock                                                                              D2: 10 min.
      time                                                                                       (0–600 min)

D4 – Password                                                                                    D3: 5 sec.
                                                                                                 (0–120 sec.)

                     Main menu, password:                                                        -

                     Select password to lock access to main menu. If a password has been

                     selected, the user will be prompted to enter the password the next

                     time they try to access the main menu. To disable the password prompt,

                     enter ‘0000’ as the password.

                     Service menu, password:
                     Select password to lock access to the service menu. If a password has
                     been selected, the user will be prompted to enter the password the
                     next time they try to access the main menu. To disable the password
                     prompt, enter ‘0000’ as the password.

D5 – Firmware        Firmware for the Optima 270 control unit and display can be updated -
      update         using a micro SD card inserted into the SD card reader of the Optima
                     Touch. To update the control unit and display, press ‘start update’ when
EA – Save/Load       the SD card containing the latest firmware has been inserted into the
      settings       card reader.

EB – F an speed     EA1 – Save settings                                                         -
      levels
                     Saves the settings from the Optima 270 control unit to the display.

                     EA2 – Load settings

                     Loads settings stored in EA1 and transfers data to a new Optima 270

                     PCB.

                     EB1 – Level 1 Supply air                                                    EB1: 30%
                     Level 1 is the lowest speed, and is usually used when no one is home.       (0–100%)
                     Both fans can be configured independently of each other with all levels,
                     so that the air flow is the same in the supply air and in the extract air,
                     thus resulting in optimal operation.
                     Specialised air measurement equipment must be used to adjust the
                     system, which can be done without making use of the main control
                     damper.
                     It is not recommended to configure the air flows without the help of an
                     expert. Incorrect configuration can lead to higher energy consumption
                     or an unpleasant indoor climate.
                     Setting option: between 0 and 100%.

                     EB2 – Level 2 Supply air                                                    EB2: 50%
                     Level 2 is the system's recommended speed for an optimal indoor             (0–100%)
                     climate.
                     It should be adjusted to the home's ventilation requirements.
                     Setting option: between 0 and 100%.

                     EB3 – Level 3 Supply air is typically configured for a high level of        EB3: 75%
                     activity in the house.                                                      (0–100%)

		11
Menu              Description                                                                Factory setting (max./
                                                                                             min. values)
EB – F an speed  EB4 – Level 4 Supply air is typically configured at 100% airflow for
      levels      rapid air exchange throughout the house.                                   EB4: 100%
                  Remember that a higher air exchange rate increases energy                  (0–100%)
                  consumption.

                  EB5 – Level 1 Extract air                                                  EB5: 30%

                  The fan speed is regulated to match the amount of supply air at level 1. (0–100%)

                  EB6 – Level 2 Extract air                                                  EB6: 50%

                  The fan speed is regulated to match the amount of supply air at level 2. (0–100%)

                  EB7 – Level 3 Extract air                                                  EB7: 75%

                  The fan speed is regulated to match the amount of supply air at level 3. (0–100%)

                  EB8 – Level 4 Extract air                                                  EB8: 100%

                  The fan speed is regulated to match the amount of supply air at level 4. (0–100%)

                  EB9 – Fan mode                                                             EB9: %
                  Use % if no built-in airflow sensors are connected. Fan speed inputs       (%/m3/h)
                  EB1 to EB9 will be based on the % of maximum capacity.
                  Select m3/h as the setting for constant air flow control.

                  Note that this requires built-in airflow sensors in the system.
                  Be aware that using this function without airflow sensors will lead to
                  incorrect volume flows in the system.

                  Please note that the fans will automatically adapt to an increased
                  drop in pressure (e.g. clogged filters) to maintain a constant air flow –
                  in this case, increased fan power consumption can be expected.
                  When selecting m3/h, EB1 to EB9 will automatically allow direct
                  setting of the desired air volume in m3/h. Please note that m3/h
                  setpoints must match the capacity of the ventilation system. When
                  using m3/h regulation, 1% corresponds to 10 m3/h (in general for all
                  parameter settings related to fan operation).

                  EB10 – RPM alarm                                                           EB10: On
                  Off = Fan RPM feedback is not actively used.                               (On/Off)
                  On = If RPM feedback from the fans reaches 0 RPM and the fan is
                  expected to run, the ventilation system will shut down and display an
                  alarm.

                  EB11 – Reset RPM alarm                                                     EB11: Off
                  Enable this feature to reset the RPM alarm when the issue has been         (On/Off)
                  resolved.

EC – Regulator    EC1 – Frost protection                                                     EC1: Fan Reduc.
                  Off = No active frost protection.                                          (Off/Fan Reduc./Rotor
                                                                                             Reduc./Fan+Rotor)

12 		
Menu            Description                                                               Factory setting (max./
EC – Regulator                                                                            min. values)

                Fan Reduc. = The fan speed for supply air is gradually reduced to
                keep the temperature sensor in the exhaust (T4) at the EC2 setpoint.
                Rotor Reduc. = Rotary heat exchanger speed is gradually reduced to
                keep the exhaust temperature sensor (T4) at the EC2 setpoint. The
                de-icing process starts automatically, depending on the measured
                indoor humidity and outdoor air temperature. Minimum rotor speed
                in de-icing mode = 1 RPM.

                Fan+Rotor = Rotary heat exchanger speed is gradually reduced to
                keep the exhaust temperature sensor (T4) at the EC2 setpoint. The
                de-icing process starts automatically, depending on the measured
                indoor humidity and outdoor air temperature. Minimum rotor speed
                in de-icing mode = 1 RPM. If the EC2 setpoint is not reached in time,
                reducing the supply air fan speed will help to achieve this.

                EC2 – Frost reduction                                                     EC2: +3
                Adjustable setpoint for frost protection strategy EC1                     (-10 to +10)

                EC3 – Regulation method                                                   EC3: T7 Extract air
                T1 Supply air = Airborne climate control is based on the supply air       (T1 Supply air/T7 Extract
                sensor.                                                                   air)
                T7 Extract air = Airborne climate control is based on the
                temperature sensor for the extract air sensor.

                EC4 – 0-10V output mode                                                   EC4: Rotor
                Bypass = 0–10 volt output L11 can be adjusted to control the 0–10         (Water valve/Rotor/
                volt bypass motor.                                                        Bypass)
                Rotor = 0–10 volt output L11 can be adjusted to control the rotary
                heat exchanger.
                Water valve = 0–10 volt output L11 can be adjusted to control a
                water-based reheater.

                EC5 – Auxiliary relay H17                                                 EC5: 0
                Setpoint Function                                                         (0–6)
                0 The relay is off.
                1 The relay is on when the system is running. This can be used to e.g.

                  open and close outdoor air and exhaust air dampers.
                2 The relay is switched on when extra heat is required, or when

                  the circulation pump must run when heating with water reheat is
                  required.
                3 The relay is on when the ‘Change filter’ alert is active. This can be
                  used to activate an external alert.
                4 The relay is on when cooling is required.
                5 The relay is switched on if one of the following two conditions is
                  met:
                  •The outdoor temperature, sensor T9, is lower than the set value in
                   EC8 (frost protection temperature, typically set to 5°C).
                  •The outdoor temperature, sensor T9, is >15°C and the room
                   temperature is > setpoint +1°C.

		13
Menu            Description                                                                 Factory setting (max./
EC – Regulator                                                                              min. values)

                6 The relay will be on when terminal L1 is shorted/activated (e.g.
                   by connecting a kitchen cooker hood to the ventilation unit). This
                   function can be used to activate a damper, which reduces the airflow
                   to the rest of the house and focuses the extract air through the hood.

                EC6 – Regulation water                                                      EC6: 20 sec.
                If a water reheater with motor valve is installed in the system, it may     (1 sec. to 250 sec.)
                be necessary to change the regulation time. The shorter the regulation
                time, the faster the motor valve will regulate.

                EC7 – Water frost protect                                                   EC7: Off
                If a water reheater with motor valve is installed in the system, a frost    (On/Off)
                protection sensor must be installed on the water reheater and the
                setpoint must be set to ON.
                If no frost protection sensor is installed, the setpoint must be set to
                OFF.

                EC8 – Water frost temp.                                                     EC8: 5°C
                If frost protection in EC7 is set to ON, the frost protection temperature   (0–10°C)
                must be set to the temperature at which the system should stop, and
                the motor valve must open fully for hot water flow.

                EC9 – System stop                                                           EC9: Off
                Allows you to choose whether it is possible to stop the system by           (On/Off)
                selecting ‘standby’ under the settings for fan speed. If the setpoint is
                set to OFF, the system cannot be turned off.
                If ‘On’ is then selected, ‘standby’ will be displayed in the fan speed
                selector on the main display.

                EC10 – Right/left model                                                     EC10: Right
                Right = The ventilation system designed as a right-facing model (only       (Right/Left/Rotor
                for counter-flow heat exchanger units and right-facing rotor version).      Left)
                Left = The ventilation system designed as a left-facing model (only for
                counter-flow heat exchanger units).
                Rotor left = The ventilation system designed as a left-facing model
                (applies only to units with a rotary heat exchanger).

                Note that this setting should only be changed by the installer, as there
                is a risk of disrupting the machine's functions if an incorrect setting is
                used.

                EC11 – Factory reset                                                        EC11: Off
                Reset -Fans = Resets all control unit values (except fan speeds) to         (Off/Reset -Fans/
                factory settings.                                                           Reset all)
                Reset all = Resets all control unit values to factory settings.

                EC12 – Model Type                                                           EC12: 0
                0 = Basic setup                                                             (0/1)
                1 = T3=T1 ; T7=T4

                Setpoint 1 is used for ventilation systems with a double integrated
                temperature sensor in the heat exchanger to ensure an accurate
                temperature is indicated during active bypass

14 		
Menu            Description                                                                     Factory setting
EC – Regulator                                                                                  (max./min. values)

ED – Electric   EC13 – Output H3 selection                                                      EC13: Preheat
      heating   H3 Operating modes                                                              (Preheat/Reheat/
                Preheat = R1 released for operation as preheater (activated via EC1)            Always on)
                Reheat = R1 released for operation as reheater (activated via A1)
                Always on = R1 is switched on as operating relay, independent of EC1 and A1

                ED1 – preheat                                                                   ED1: Off
                                                                                                (off/T3 outdoor air/
                Off = preheater disabled                                                        t4 Exhaust)

                T3 outdoor air = Electric preheater controlled by the temperature sensor for
                outdoor air (T3).

                T4 Exhaust = Electric preheater controlled by the temperature sensor in the
                exhaust (T4).

                ED2 – Preheating temperature                                                    ED2: +3°C
                Temperature setpoint, frost protection preheater – see menu                     (-15 to +10°C)
                EC1 for reference temperature sensor

                ED3 – Preheat PI P                                                              ED3: 5
                P band for PI control unit for the electrical modulating preheater. The         (1–255)
                P band controls the amplification of the control unit after a deviation from
                the setpoint (accelerator).

                ED4 – Preheat PI I                                                              ED4: 200
                I band for PI control unit for the electrically modulating reheater. This       (1–255)
                function controls how quickly the control unit adapts to a deviation from the
                setpoint (brake).

                ED5 – Preheat reg.                                                              ED5: 40 sec.
                The preheat cycle function works as follows: E.g. necessary output 50%          (10–120 sec.)
                and cycle = 60 sec. means that the regulator turns on the preheater for 30
                seconds and turns it off for 30 seconds.
                Please note: Please refer to your country-specific restrictions when
                customising this feature. The modulating preheater function refers to the
                value set in setpoint EC1.
                The preheater will aim to maintain a stable outdoor air temperature
                according to this setpoint. When the modulating preheater is used, the
                existing outdoor air temperature sensor (T3) built into the ventilation unit
                can be used as a reference. No additional temperature sensor is required.

                ED6 – Reheat offset                                                             ED6: –2°C
                Offsetting of reheater with reference to the setpoint for the requested         (-10 to +10°C)
                temperature. E.g. requested temperature = 20°C Offset value = 2, the
                reheater will aim to maintain a supply air temperature of 18°C.

                ED7 – Reheat PI P                                                               ED7: 5
                P band for PI control unit for the electrically modulating reheater. The P      (1–255)
                band controls the amplification of the control unit after a deviation from the
                setpoint (accelerator).

                ED8 – Reheat PI I                                                               ED8: 200
                I band for PI control unit for the electrically modulating preheater. The       (1–255)
                function controls how fast the control unit adapts to a deviation from the
                setpoint (brake).

		15
Menu           Description                                                                Factory setting (max./
ED – Electric                                                                             min. values)

      heating  ED9 – Reheat Reg                                                           ED9: 40 sec.
               The reheater function works as follows: E.g. necessary output 50% and      (10–120 sec.)
EE – Bypass    cycle = 60 sec. means that the control unit turns on the reheater for 30
               seconds and turns it off for 30 seconds.
               Please note: Please refer to your country-specific restrictions when
               customising this feature. The modulating reheater function refers to the
               value adjusted in the selected temperature and selected sensor for the
               control (see EC3).

               To allow the reheater to work, set the setpoint A1 to On. The reheater
               will aim to maintain a stable temperature in the supply air according to
               this setpoint. When using the modulating reheater, it is necessary to
               replace the supply air temperature sensor (T1) in the ventilation unit
               with a new temperature sensor installed upstream of the reheater.

               ED10 – Regulation elec. time                                               ED10: 3 min.
               If an on/off reheater is installed on output H3, the regulation time may   (1–30 min)
               need to be adjusted. The regulation time indicates the minimum pause
               between on/off cycles of the heating surface.                              EE1: 3°C
                                                                                          (1–10°C)
               EE1 – Bypass open offset
               The temperature at which the bypass should be 100% open can be
               set here. A temperature difference can be set here, which means that
               if you want the bypass to be 100% open at e.g. 23°C and if the set
               temperature is 20°C, this menu item must be set to 3°C.

               The bypass will open provided that:
               1.The extract air temperature T7 is higher than the outdoor air

                 temperature T3.
               2.The outdoor air temperature is above the set temperature in menu

                 EE2 (desired temp – EE2) = 21 – 4 = 17°C outdoor air.

               Units with modulating bypass
               If the temperature rises to 0.5°C above the desired temperature, the
               bypass damper will start to open. The bypass is 100% open when
               the temperature reaches the ‘requested temperature’ setpoint + the
               temperature difference set in this menu item. To ensure an even opening
               of the bypass, the temperature at which the bypass opens completely
               must be set to approx. 3°C above the desired temperature.

               Units with on/off bypass
               The bypass opens when the temperature reaches the desired
               temperature + the temperature difference set in this menu item.

               EE2 – Turn off bypass                                                      EE2: 4°C
               To prevent the bypass damper from opening at low outside air
               temperature and blowing cold, unheated air into the home, use this         (0–20°C)
               function to configure the minimum outdoor air temperature at which
               the damper should be closed. The value is an expression of the largest
               difference that must exist between the desired temperature and the
               lowest outdoor air temperature (offset).

               Setting options: Between 0 and 20°C.
               If 0°C is selected, the function will be deactivated and there will be no
               limit for the lowest outdoor temperature.

16 		
Menu             Description                                                               Factory setting (max./
EE – Bypass                                                                                min. values)

EF – Filter      EE3 – Forced speed                                                        EE3: 0%
                 In this menu, the desired forced, stepped fan speeds can be selected      (0–100%)
EG – H umidity  when the bypass opens for night cooling and when the setpoint in EE4 is
      control    exceeded.

                 EE4 – Forced temp.                                                        EE4: 3°C

                 Offset value setpoint for enabling forced fan speed, e.g. when bypass is (0–5°C)

                 open for night cooling (fan speed increased by the value set in EE3).

                 Requested temperature 20°C
                 EE1 = 3°C
                 Bypass opens at 23.1°C.
                 EE4 = 3°C
                 Increase in fan speed at 26.1°C

                 EE5 – Bypass Time min on                                                  EE5: 5 min.
                 Bypass will be open to at least the set value.                            (0–60 min)

                 EF1 – Filter reset                                                        EF1: Reset filter
                 Select this option to reset the filter timer to 0 days.
                 The current counter value will show days since the last filter reset.

                 EF2 – Filter timer                                                        EF2: 3 months
                 Setpoint for adjusting the number of months until the filter alert is     (0–12 months)
                 activated.
                 0 months = filter timer disabled

                 EF3 – Filter/stop                                                         EF3: Off
                 To ensure that the filters are changed when the filter change alert       (On/Off)
                 is active, the setpoint can be set to ON. The system will then stop
                 automatically after 14 days if the filters have not been replaced in the
                 meantime. If this precaution is not required, the setpoint can be set to
                 OFF and the system will continue to run.

                 EG1-Humidity max Temp.                                                    EG1: 15°C
                 Setting the end point for outdoor temperature compensation (T3),          (0–25°C)
                 see the X-axis on the graph. If 0 is selected – outdoor temperature
                 compensation is deactivated and the set value under EG2 is maintained
                 as a constant setpoint.

                 EG2 – Humidity max. value                                                 EG2: 60%
                 Sets the endpoint for outdoor temperature compensation, see the           (35–85%)
                 Y-axis on the graph (desired max. humidity value).

                 EG3 – Humidity fan speed                                                  EG3: 15%
                 Determines how much the fan speed can vary relative to                    (5–30%)
                 the desired fan speed.
                 Examples: Setpoint, fan speed level 2 (EB2 / EB6) = ± 15%.
                 Please note: If EB9 is set to constant volume flow control (m3/h), then
                 the EG3 setting will correspond to setpoint x 10 = influence in m3/h
                 e.g. EG3=5 corresponds to the permitted variation in the air volume of
                 up to 5 x 10 = 50 m3/h

		17
Menu             Description                                                                        Factory setting (max./
EG – H umidity                                                                                     min. values)

       control   EG4 – Humidity reg. frequency                                                      EG4: 10 min.
                 Setting the desired frequency for how often the fan speed can be                   (1–60 min)
EH – Rotor       changed.
                 The function is defined as 1% per unit of time.
                 When humidity control is activated, the current humidity is continuously
                 measured via the integrated humidity sensor in the ventilation system,
                 located in the extract air duct.

                 EH1 – Rotor speed (rpm)                                                            EH1: 3 RPM
                 The setpoint for the minimum speed of the rotary heat exchanger                    (0–25 RPM)
                 (revolutions per minute).
                 Be aware that a reduction in the RPM value may reduce the heat
                 recovery rate but increase the control range for moisture recovery.
                 These values should be adjusted by an installer.

                 EH2 – Rotor stop °C                                                                EH2: 2°C

                 Offset setpoint for temperature where heat recovery with a rotary heat (0–10°C)

                 exchanger is stopped.

                 E.g.
                 setpoint: temperature 20°C
                 EH2 = 2
                 Rotary heat exchanger stops when outdoor air temperature T3 is 20-2 =
                 18°C.
                 This feature will save energy for the rotor motor when there is limited
                 opportunity to recover energy.

                 EH3 – Max deicing min.                                                             EH3: (30–1000 min)
                 Setpoint in minutes for the maximum time that can be spent de-icing                (1–120 min)
                 the rotary heat exchanger. If the time limit is exceeded, the rotary heat
                 exchanger will return to normal operation.

                              EH4 – Deicing pause                                                   EH4: 4 hours
                              Setpoint in hours corresponding to the minimum time interval between  (1–8 hours)
                              de-icing cycles.
                                                                                                    EI1: Off
EI – Demand control EI1 – CO2 control                                                               (On/Off)
                              On = Activates external sensors for demand control (if available).
                              Off = No external sensors available for demand control.

                 EI2 – CO2 setpoint                                                                 EI2: 800 PPM
                 Setpoint for the desired CO2 level in PPM.                                         (400–2000 PPM)
                 If the CO2 level rises above the setpoint, the fan will increase the speed
                 incrementally to keep the CO2 level at the setpoint.

                 EI3 – CO2 level 4 time                                                             EI3: (30–1000 min)
                 Setpoint in minutes for the time between incremental increases/                    (0–1000 min)
                 decreases in fan speed according to CO2 level (see setpoint EI2)

                 EI4 – Number of Rf CO2 sensors                                                     EI4: 0
                 Select the number of wireless CO2 sensors connected.                               (0–4)
                 Make sure the dip switches in the CO2 sensors are set correctly
                 according to the separate documentation.

18 		
Menu               Description                                                                Factory setting (max./
EJ – Fire control                                                                             min. values)
                   EJ1 – Number of fire dampers
                   Setpoint for the number of fire dampers connected to the system that       EJ1: 0
                   should be monitored.                                                       (0–4)
                   0 = Fire control system inactive
                   1–4 = Number of dampers connected

                   EJ2 – Fire test/Reset                                                      EJ2: Off
                   Off = Automatic mode, damper will be tested once per month according       (Off/Test/Reset)
                   to the schedule.
                   Test = Test system now. This function starts a forced function test of
                   the fire damper and the result is shown on the display (NB: There will be
                   a delay of up to 240 seconds from the start of the test to completion).
                   Reset = Reset fire alarm. In case of any errors during the damper test
                   or in the damper/smoke detector or a lack of feedback, the ventilation
                   system will shut down and the display will show an alarm symbol.
                   Restarting the device requires a fire auto reset.

                   EJ3 – Fire test, date                                                      EJ3: 1
                   Schedule when the automatic monthly test of fire/smoke dampers is          (1–31 days)
                   performed.

                   EJ4 – Fire test hour                                                       EJ4: 0
                   Schedule when the automatic fire/smoke damper test is performed.           (0–23 hours)

EK – D istrict heating PLEASE NOTE:

control            If no external outdoor temperature sensor is connected to the control

                   unit, the built-in outdoor air temperature sensor in the ventilation

                   system is used as a reference in calculating temperature setpoints for

                   weather compensation.

                   EK1 – District heating mode                                                EK1: Off
                                                                                              (Off/Floor/Heater)
                   Off = No external heating circuit connected.
                   Floor = Floor circuit connected.
                   Heater = Heater circuit connected.

                   EK2 – Outdoor compensation at -12°C                                        EK2: 45°C
                   Setpoint for supply temperature at -12°C outdoor temperature.              (20–90°C)

                   EK3 – Outdoor compensation at 20°C                                         EK3: 20°C
                   Setpoint for outdoor temperature when the supply temperature is            (15–25°C)
                   20°C.
                   An outdoor air temperature that exceeds the setpoint in EK3 will close
                   the heating circuit (summer stop).

                   EK4 – Offset of compensation curve                                         EK4: 2°C
                   Setpoint in °C at which the heat compensation curve set in EK5 will        (-10 to +10°C)
                   have the greatest influence.

                   EK5 – Compensation curve                                                   EK5: 2°C
                   The heating curve can be increased in increments of 0–5°C with a           (0–5°C)
                   maximum influence according to the value set in EK4.

		19
Menu                    Description                                                                Factory setting (max./
                                                                                                   min. values)
EK – District heating  EK6 – Max. supply temperature
      control           The supply temperature will be limited to a maximum of 45°C if floor is    EK6: 45°C
                        chosen in EK1.                                                             (20–65°C)
                        The supply temperature will be limited to 90°C if heater heating is
                        selected in EK1.

                        EK7 – Valve time (sec.)                                                    EK7: 150 sec.
                        Time from 3-point control valve fully closed to fully open (depends on     (1–255 sec.)
                        actuator and valve stem configuration). For more information refer to
                        the valve supplier's manual.

                        EK8 – Max. return temperature                                              EK8: 50°C
                        If the maximum return temperature exceeds the temperature setpoint,        (25–70°C)
                        the valve will close incrementally until the return temperature reaches
                        the setpoint.

                        EK9 – Neutral zone                                                         EK9: 1°C
                        Hysteresis for temperature control via PID.                                (0–10°C)

                        EK10 – Heat PI P                                                           EK10: 20
                        PI control unit P-band.                                                    (0–255)
                        By increasing this value, the control unit will aim to reach the setpoint
                        temperature faster (with the risk of exceeding the setpoint).

                        EK11 – Heat PI I (x 10)                                                    EK11: 50
                        PI control unit I-band.                                                    (0–255)
                        By increasing this value, the control unit will aim to reduce overshoot/
                        offset of temperatures (with the risk of slowing down the control unit).

EL – Modbus             EK12 – Heat reg. time                                                      EK12: 5 sec.
                        The regulation time of the PI control unit.                                (1–120 sec.)
                        Increasing this value will slow the control unit down, increasing the
                        interval between recalculation of the valve position.                      EL1: 1
                                                                                                   (1–247)
                        EL1 – Modbus address
                        Modbus slave address for the device.

                        EL2 – Modbus baud rate                                                     EL2: 9600 baud
                        Choose either 9600 or 19200 baud, depending on the type of                 (9600/19200 baud)
                        application.
                                                                                                   EL3: Even
                        EL3 – Modbus parity                                                        (None/Even/Odd)
                        Select even or odd depending on the type of application.
                                                                                                   EL4: 1
                        EL4 – Modbus modify                                                        (0/1/2)
                        0 = writing to modbus setpoints not allowed
EM – M anual           1 = writing to modbus setpoints limited
       Override         2 = writing to modbus setpoints full access
                        Enter password to open relay test program (for installers only).
OEM
                        Enter password to open the OEM program (for installers only).

20 		
8. FURTHER EXPLANATIONS OF HUMIDITY
AND DISTRICT HEATING CONTROL

8.1 Explanation of humidity control                                                                                                   Example 1:
                                                                                                                                      At an outdoor air temperature of 10°C,
                      90                                                                                                              the RH control aims for 53% humidity, as
                                                                                                                                      measured in the extract air.
                      80                                   EG1Setting range EG1
                                                                                                                                      Example 2:
                                                                   and EG2                                                            At an outdoor air temperature of 20°C,
                                                                                                                                      the RH control aims for 60% humidity, as
                      70                                                                                                              measured in the extract air.

                    EG2 60                                                                                                            EG1 and EG2 are used to change the
                                                                                                                                      characteristics of the humidity control
                             50                                                                                                       values by shifting the compensation curve
RH %                                                                                                                                  (indicated by the green line on the graph).
                                                                                                                              EG240
                                                                                                                                   Note: If EG1=0°C, outdoor temperature
                      30                                                                                                           compensation is deactivated and the system will
                                                                                                                                   regulate according to a constant humidity level in
                      20                                                                                                           accordance with EG2.

                      10                                                                                                           Remember to adapt EG2 to a suitable humidity
                                                                                                                                   level so that there is no risk of damp surfaces in
-15  -10        -5    0          0  5       10                  15          20      25  30                                         the home in winter.

                                    Udeluft temperatur ᵒC       EG1

Level 4 = 100%

Level 3 = 75%                          65%                                                                                         Example:
Level 2 = 50%                                                                                                                      Setpoint = ± 15% (EG3)
Level 1 = 30%                       ±15%                   EG3                                                                     With a desired fan speed of 2, set to 50%,
                                                                                                                                   speed may
                                       35%                                                                                         range from 35% to 65%.

                                                                                                                                   Humidity control is only available at fan
                                                                                                                                   speed level 2 and will be automatically
                                                                                                                                   disabled at any other fan speed level.

                                                                                                                                   Speed regulation is ±1% every 10 minutes.
                                                                                                                                   (Factory setting, EG4).

8.2 Explanation of district heating control                          EK5 set = 5°C                                                 The district heating control system
                                                                     EK5 set = 4°C                                                 automatically adjusts the heating system's
             Setpoint, supply line temp.                             EK5 set = 3°C                                                 supply temperature according to the
                                                                     EK5 set = 2°C                                                 outdoor air temperature.
         EK6 Max. supply line temp.                                  EK5 set = 1°C
                             (45°C Floor)                            EK5 set = 0°C                                                 The characteristics of the heating curve
                                                                                                                                   can be adjusted via EK2 and EK3.
         EK6 Max. supply line temp.
                          (65°C Heater)                                                                                            EK2 adjusts the desired supply
                                                                                                                                   temperature at an outdoor temperature of
                20°C                                                                                                               -12°C.

                                                                                                                                   EK3 adjusts the desired outdoor
                                                                                                                                   temperature when the supply temperature
                                                                                                                                   is 20°C.

                                                                                                                                   In order to increase the heating capacity of
                                                                                                                                   the heating system at a specific outdoor
                                                                                                                                   temperature, EK4 and EK5 can be used
                                                                                                                                   to shift the characteristics of the heating
                                                                                                                                   curve.

                                    -12°C                  2°C                  20°C                                               Outdoor air temp.

                                    EC2                    EK4                   EK3

		21
8.3 Schedule for setpoints

Main menu/submenu           Factory settings  Optima 270                     Form for user settings
A – User                                           Setting range
A1 – Reheating                      Off
A2 – Humidity control               Off                On/Off
A3 – Boost time              (30–1000 min)             On/Off
A4 – Timer levels 3 and 4           Off              1–120 min.
A5 – Timer levels 3 and 4         3 hours              On/Off
                                                     1–9 hours

B – Scheduler               Not in use            Not in use/Levels 1–4
B1 – Fan scheduler          Not in use        Not in use/Reduced/Normal
B2 – Temperature scheduler
B3 – Enable Scheduler           Off                         On/Off
B4 – Alternative Temp.         0.0°C                  -10°C to +10°C

C – Date/Time

C1 – Time

C2 – Date

C3 – Daylight Saving Time   On                On/Off

D – Display                 English           English/Dansk/Deutsch/Svenska
D1 – Language               10 min.                         0–600 min.
D2 – Screen saver time       5 sec.                         0–120 sec.
D3 – Display lock time       0000                           0000-9999
D4 – Password
D5 – Firmware update

EA – Save/Load settings
EA1 – Save settings
EA2 – Load settings

EB – Fan speed levels       30%               0–100%
EB1 – Level 1 Supply air    50%               0–100%
EB2 – Level 2 Supply air    75%               0–100%
EB3 – Level 3 Supply air    100%              0–100%
EB4 – Level 4 Supply air    30%               0–100%
EB5 – Level 1 Extract air   50%               0–100%
EB6 – Level 2 Extract air   75%               0–100%
EB7 – Level 3 Extract air   100%              0–100%
EB8 – Level 4 Extract air                     %/m3/h
EB9 – Fan mode                %               On/Off
EB10 – RPM alarm              On              On/Off
EB11 – Reset RPM alarm       Off

22 		
Main menu/submenu              Factory settings  Optima 270                         Form for user settings
EC – Regulator                                        Setting range
EC1 – Frost protection
                                Fan Reduc.       Off/T3 Outdoor air/T4 Exhaust/Fan
EC2 – Frost reduction                              Reduc./Rotor Reduc./Fan+Rotor
EC3 – Regulation method              +3°C                      -10°C to +10°C
EC4 – 0-10V output mode        T7 Extract air         T1 Supply air/T7 Extract air
EC5 – Auxiliary relay H17                              Water valve/Rotor/Bypass
EC6 – Regulation water              Rotor                             0–6
EC7 – Water frost protect              0                         1–250 sec.
EC8 – Water frost temp.                                             On/Off
EC9 – System stop                  20 sec.                          0–10°C
EC10 – Right/Left model              Off                            On/Off
EC11 – Factory Reset                 5°C                  Right/Left/Rotor Left
EC12 – Model Type                    Off               Off/Reset – Fan/Reset all
EC13 – Output H3 selection          Right                          0–9999
                                     Off              Preheat/Reheat/Always on
                                       0

                                  Preheat

ED – Electric heating            Off             Off/T3 outdoor air/T4 exhaust
ED1 – Preheat                   +3°C                       -15°C to +10°C
ED2 – Preheating temperature                                     1–255
ED3 – Preheat PI P                5                              1–255
ED4 – Preheat PI I               200                         10–120 sec.
ED5 – Preheat reg.             40 sec.                     -10°C to +10°C
ED6 – Reheat offset             -2°C                             1–255
ED7 – Reheat PI P                                                1–255
ED8 – Reheat PI I                 5                          10–120 sec.
ED9 – Reheat Reg                 200                           1–30 min.
ED10 – Regulation elec. time   40 sec.
                               3 min.

EE – Bypass                     3°C               1–10°C
EE1 – Bypass open offset        4°C               0–20°C
EE2 – Turn off bypass           0%               0–100%
EE3 – Forced speed              3°C                0–5°C
EE4 – Forced temp.             5 min.            0–60 min.
EE5 – Bypass Time min on

EF – Filter                    3 months          0–12 months
EF1 – Filter reset                Off                On/Off
EF2 – Filter timer
EF3 – Filter/stop

EG – Humidity control           15°C              0–25°C
EG1-Humidity max Temp.          60%              35–85%
EG2 – Humidity max. value       15%               5–30%
EG3 – Humidity fan speed       10 min.           1–60 min.
EG4 – Humidity reg. frequency

		23
Main menu/submenu               Factory settings  Optima 270              Form for user settings
EH – Rotor                                                Setting range
EH1 – Rotor speed (rpm)               3 RPM
EH2 – Rotor stop °C                     2°C                  0–25 RPM
EH3 – Max deicing min.                                         0–10°C
EH4 – Deicing pause              (30–1000 min)
                                      4 hours               1–120 min.
                                                             1–8 hours
EI – Demand control                    Off
EI1 – CO2 control                  800 PPM                     On/Off
EI2 – CO2 setpoint              (30–1000 min)            400–2000 PPM
EI3 – CO2 level 4 time
EI4 – Number of Rf CO2 sensors           0                 0–1000 min.
                                                                 0–4
EJ – Fire control
                                                              0–4 pcs
EJ1 – Number of fire dampers    0                        Off/Test/Reset

EJ2 – Fire Test/Reset           Off                          1–31 days
                                                            0–23 hours
EJ3 – Fire test, date           1
                                                        Off/Floor/Heater
EJ4 – Fire test hour            0                             20–90°C
                                                              15–25°C
EK – District heating control      Off
EK1 – District heating mode       45°C                    -10°C to +10°C
EK2 – Outdoor temp comp. -12°C    20°C                          0–5°C
EK3 – Outdoor temp comp. 20°C      2°C
EK4 – Comp. curve offset           2°C                        20–65°C
EK5 – Compensation curve          45°C                      1–255 sec.
EK6 – Max flow temp.            150 sec.                      25–70°C
EK7 – Valve time (sec.)           50°C
EK8 – Max. return temp.            1°C                         0–10°C
EK9 – Neutral zone                                             0–255
EK10 – Heat PI P                   20                          0–255
EK11 – Heat PI I (x10)             50                       1–120 sec.
EK12 – Heat Reg. time            5 sec.
                                                               1–247
EL – Modbus                           20               9600/19200 baud
EL1 – Modbus address            19200 baud
EL2 – Modbus baud rate                                   None/Even/Odd
EL3 – Modbus parity                 Even                        0, 1, 2
EL4 – Modbus modify                    1

EM – Manual Override

OEM

24 		
9. MAINTENANCE

9.1 Replacing the filters                                       Fans
                                                                Inspect the two fans for dirt every year. If they are dirty,
When the filter alert is displayed, the filters must be         they can be cleaned with a brush, bottle cleaner, etc. Valves
replaced.                                                       for supply air and extract air: The valves can be cleaned by
Stop the system using the switch for the unit or with the       wiping them with a dry cloth. Be careful not to rotate the
switch on the terminal block. Open the front cover/filter       valves so that the air volume changes.
drawers and remove the filters. The filter timer resets once
the filters have been replaced. The time interval for           9.2 Dismantling/taking the system out of
cleaning/replacing the filters can be adjusted in the           operation
operating menu.
Based on normal environmental conditions with clean air, it     It is generally recommended to maintain a constant flow of
is recommended to change the filter every six months to         air through the ventilation system to prevent condensation
ensure optimal working conditions.                              in the ducts.

Vacuuming or using compressed air on the filters is not         If the system is to be taken out of operation, the ducts must
recommended.                                                    be removed to avoid condensation in the system and in the
                                                                ducts.
Recommended filters to use: Original Genvex filters,
Coarse/G4 = Standard filter (typically used on the extract      If the ventilation system is taken out of operation for
air side); ePM10/F5 = Fine filter; ePM1/F7 = Pollen filter      shorter periods of time – it is recommended to close all
(typically used on the outdoor air side).                       supply air and extract air valves.

Please note that the recommended annual service of the
ventilation system's internal components should be carried
out by an installer as listed below.

Condensate drain
When changing the filter in August/September, before the
outdoor temperature drops to 5°C, check that the
condensate drain is not blocked by dirt and ensure that
there is water in the trap. Pour 1 litre of water into the
condensate tray and make sure it drains away without any
issue. A condensate drain that does not function properly
can lead to water damage in the home.

Heat exchanger
Check the heat exchanger every year. If it is dirty, remove it
and: – Aluminium exchanger: Wash in lukewarm soapy water
and rinse using a showerhead if necessary. – Plastic
exchanger: Do not clean with solvents – only use clean
water and carefully remove dust from suction surfaces with
a regular vacuum cleaner.

		25
10. TROUBLESHOOTING

10.1Safety thermostat in electric heater                       Cold supply air
      (optional)                                                Possible error
                                                                • Clogged heat exchanger.
If there is an error in an electric heater, the safety          • Defective extractor fan.
thermostat will be disconnected. The heater is equipped         • Clogged exhaust filter.
with overheating protection that automatically cuts the         • 	Electrical reheater disconnected by superheating
power off if the temperature exceeds 50°C.
                                                                  thermostat (only units with electrical reheater installed).
If the temperature drops, the heater automatically              • 	Air in the heating pipes, defective thermostat/motor
reconnects. As an additional safety feature, there is a
built-in thermal fuse that switches off if the temperature        valve, wrong setting in the control panel.
exceeds 100°C. Subsequent connections must be made
manually.                                                       Fan unintentionally runs at full speed
                                                                Check that EB9 is not set to m3/h when no flow sensors are
Does not apply to PTC electric heaters.                         installed. Make sure EB9 is set to %.
                                                                If flow sensors are installed in the product, check that the
The system is not running. Device stopped                       duct system is not blocked and that the pressure drop is
Possible error                                                  sufficiently low (the ventilation unit is not able to reach the
• Fuse in the main board is blown, no power to 			              setpoint).

  the device.                                                   10.2 Error codes
• One of the fuses on the unit's circuit board has blown.
• Loose wire, no power to unit.                                 Error messages will be displayed in plain text on the Optima
• Loose wire between the unit and the control panel.            Touch display. When using only the I/O connector PCB and
• Defective or incorrectly set weekly program.                  Optima Basic display, LED 2 will flash red with the error
• 	Filter timer has turned off the system.                     messages.

Condensation runs out of the unit                               Refer to the table below to identify errors.
Possible error:
• Condensate drain blocked by dirt.                             LED 1: Online
• 	The condensate drain is not sufficiently protected          Green light on = internet connection ok
                                                                Green light off = no internet connection
  against freezing at low outdoor temperatures.
   •	If EB10 = On, the fans must be checked to ensure they     LED 2: Alarm
                                                                 1 flash		 =		 Stop controller – check the guard if fitted and
       are operating. If the fans are expected to run and the
       RPM counter = 0, the ventilation unit will shut down     			 the condensate drain
       and display an alert.                                    2 flashes =		 Temperature sensor and humidity sensor errors
   • Leaky junction – possibly cracked by frost                 3 flashes =		 Filter alarm
                                                                4 flashes =		 Fan failure – check the fan, the RPM feedback
No supply air                                                   				 signal is 0
Possible error                                                  5 flashes =		 Water frost error
• Defective supply air fan                                      6 flashes =		 Fire error/on test
• Clogged supply air filter                                     7 flashes =		 Fire error – Damper 1
• 	Outdoor air grill clogged by dirt and leaves during autumn  8 flashes =		 Fire error – Damper 2
                                                                9 flashes =		 Fire error – Box 1
  or snow and ice in winter.                                    10 flashes =		 Fire error – Damper 3
• The fuse on the circuit board has blown.                      11 flashes =		 Fire error – Damper 4
• 	The unit is in defrost mode (supply air fan stops).         12 flashes =		 Fire failure – Box 2
                                                                13 flashes =		 Rotor alarm – indicates high exhaust 		
No extract air                                                  				 temperature and inefficient heat recovery. 		
Possible error                                                  				 Check the drive belt and air balance.
• Defective extractor fan.
• Clogged exhaust filter.
• The fuse on the printed circuit board has blown.

26 		
   Rotary heat exchanger, operating status
   While the rotary heat exchanger is in operation, the
   following operating modes can be read on the control unit
   in the Info/Operation status menu:
   Rotor status = 0 (Rotary heat exchanger not activated in
   menu EC4)
   Rotor status = 1 (Rotor stopped due to temperature
   conditions, indoor/outdoor temperatures too close to each
   other)
   Rotor status = 2 (Rotor running for heat recovery)
   Rotor status = 3 (Rotor running due to active cooling
   recovery mode, indoor temperature is colder than outdoor
   temperature or cooling active with limitation of minimum
   supply air temperature)
   Rotor status = 4 (Defrosting mode, rotor speed reduced
   due to defrosting of rotary heat exchanger)

		27
THE AIR WE BREATHE                                    All
                                                   Genvex
    As of January 1, 2025, METRO THERM          systems are
    has merged with KVM-Genvex A/S into a        rated with
    single entity under the shared name         energy label
    METRO THERM A/S.
                                                  A
    The three well-known brands – METRO
    THERM, Genvex and KVM-Conheat – will
    continue as before, as is also the case
    for our production and administration
    sites, which will continue unchanged at
    our facilities in Helsinge and Haderslev.

    The merger is a natural progression of
    our strong collaboration and a strategic
    decision to strengthen our position as
    one of Northern Europe’s leading sup-
    pliers of heating, hot water, and ventila-
    tion solutions.

Genvex –The original Danish Ventilation System                            08:607-2602

Genvex is a genuine Danish original. We invented the ventilation
system more than 40 years ago, and we are still ahead of the pack
when it comes to development and production of the strongest and
most durable ventilation system.

Our unit is working in thousands of homes providing fresh clean air –
free of pollen, dust and harmful particles. This helps to strengthen
the health of the house and to make the indoor environment healthy
and comfortable for lots of families. At the same time, our system is
an important element when it comes to saving energy in homes and
in society as a whole – in fact you can recover up to 95% of the heat
energy with a Genvex system.

Please visit www.genvex.com to see a list of our distributors

METRO THERM A/S • Tel.: +45 48 77 00 00 • sos@genvex.dk • www.genvex.com
