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Genvex Combi 185 L User Manual

Combi 185 LS Optima 310

Made by: Genvex
Type: User Manual
Category: Heat Pump
Pages: 16
Size: 0.6 MB

 

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Version 3.04 - 0208

GB

User Manual

Combi 185 L - LS - S

Optima 310

-Heat Pump and Domestic Hot Water

 


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2

 

Optima 310

Table of contents

Page

1. 

Users Guide

1.1  Use ............................................................................3
1.2 

Altering of the operation data ....................................

3

 

1.3  Operating menu

 ........................................................

4

1.4  Week program ..........................................................9
1.5  Defrost program ........................................................9
1.5  Special functions .....................................................10
1.7  Factory default scheme ...........................................10

2. 

Function

2.1  Controller Optima 310..............................................11
2.2  Extra capacity .........................................................11 
2.3  Operation safety

 ......................................................

11 

2.4  Warnings .................................................................11

3. 

Maintaining

3.1  Connecting to computer ..........................................12
3.2  Servicing

 .................................................................

12 

3.3  Water circuit and tank

 .............................................

12 

3.4  Demounting

 .............................................................

13

4. Faultfinding

4.1  High pressure switch ...............................................14

4.2  Safety breaker for el heater ....................................

14

4.3  Heat pump will not run ............................................1

4

4.4  Air error ...................................................................

14

Subject to Technical Modifications

 


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Optima 310

1. Users guide

Optima 310 AC/EC

 

All Genvex combined domestic ventilation- and water 
heat pumps and domestic hot water of the types Combi 
185, 185S, 185L and 185LS are supplied with optima 
310 controller with a factory setup, which enables the 
immediate start of the unit without changing the operating 
settings. The factory setups are only basic settings that 
can be changed according to the operational wishes and 
demands, you have for your home, to obtain an optimal 
operation and use of the equipment.

1.1 Use

Use this button to change fan speed between 
low, medium and high. (Level 1, Level 2, Level 3). 
To stop the unit press this button 3 - 4 seconds 
until all levels are switched off. Heating coils 
will turn off immediately while the fans will run 
for app. 2 minutes in order to cool down the re-
heating surfaces.

Use this button to change the desired room 
temperature. 

Using this button, allows a signal to be sent to 
switch on the electric element to heat up the 
domestic hot water if required.

Use this button to view all temperatures in the 
unit, and press arrow down to view which relays 
are in operation. This will allow you to get a quick 
overview of the operation of the unit.

The following temperatures and relay functions are 
shown in the info menu. The relays are ON when the 
display shows 1:

T1: Supply air
T2: Room
T3: Fresh air
T4: Exhaust air
T5: Before coil (cooling coil)
T6: Coil (cooling)
T7: D. water top
T8: D. water bottom
T9: Solar collector
R1: Compressor
R3: Air heating
R2: El-heater
R8: Solar pump
R7: Supply cool
R6: Heat room
R5: Dom. water
R4: Defrost  

1.2 Altering of the operation data

Optima 310 comes with a factory setup, which enables an 
immediate start of the unit. The factory setup is basic and 
must be adjusted to the operational requirements and 
demands of the individual home, in order to obtain the 

optimum operating benefit from the unit.

The display normally shows the main menu, at which 
“day of the week, time, room temperature and short-cut 
keys” can be seen.

Press “Arrow up, Arrow down, Enter” to enter the 

operating menu. The display now shows the first four 
points on the operating menu.

Press “Arrow down” to change from one 
menupoint to the next. Press “Arrow up” to change 
from one menupoint to the previous one.

If you wish to flick through the pages of the 
‘operation menu’ you may press the “Enter”-button 
in the middle and this will change the whole page 
to the next set of menupoints.

When “>>” appears opposite a text, shown as example 
”language” in below display, you see, there is a “0” on the 
“Set point” line. By pressing “>”, the set point changes to 
“1”.

ON/OFF

C

I

ON/OFF

Room temperature

21.5

o

C

Wednesday

12:18

Supply� �

48.0

Room�

26.8

Fresh air��

22.5

Exhaust air�

0

6.0

Before coil�

23.0

Coil��

0

6.7

Info menu

C

I

ON/OFF

Room temperature

21.5

o

C

Wednesday

12:18

 


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4

 

Optima 310

By pressing “OK”, the control system reverts to the main 
menu and the text changes to English. Now all text in 
the display appear in English. If, instead, the set 
point is adjusted to “2”, all text in the display will 
be shown in German.
When the desired language has been selected, enter the 
main menu once again and change to the next operating 
point by pressing “Arrow down”.

If you wish to flick through the pages of the operating 
menu, you may press “Enter” to change the whole page to 
the next set of menu points.
If you wish to return to the previous operating point, 
you may press “Arrow up”.
If you wish to leave the operating menu, press “Exit”.
The operating menu will automatically shut down and 
return to the main menu if no button has been touched for 
app. 60 seconds, while in the operating menu.

1.3 Operating menu

1: Language
There is a choice of three languages
Set point 0 = Danish, 1 = English, 2 = German, 

2: Room temperature
The desired room temperature may be set between
10 - 30°C.
(The room sensor is installed the control panel).

3: Not in use

4: Not in use

5: Opr thermostat
The desired domestic water temperature may be set 
between 0 - 55°C, and will be heated by the heat pump. 

6: El. heater ON (domestic hot water)
By setting the set point to 1, the electric heating 
element will switch on whenever needed. If the set 
point is adjusted to 0, the electric heating element 
will not switch on, even if there is a need. At 
external temperatures below 0°C, it is an advantage 

>>Language

2  Room temperature

3  Not in use

4  Not in use

Set point  �

  

Operations menu

Exit

OK

<

>

0

to use the electric heating element to supplement the 
domestic water heating, as this leaves more heat from the 
heat pump to be used for room heating

7: El. Heater (domestic hot water)
The desired domestic water temperature may be set 
between 0 - 65°C. The electric element only heats 
up the upper half of the tank, while the heat pump 
continues heating up the lower part to the operating 
temperature adjusted in menu point 5.

8: R8 function
This relay may be used as follows: If the set point is 
0, a circulation pump for the solar collector, may be 
connected. The control is of this device is according 
to point 20. If the set point is 1, a circulation pump 
for a water  after heating coil, may be connected. The 
pump will only switch on if there is a need for heating. 
If the set point is 2, you may connect supply and 
exhaust air dampers, which opens and closes, when the 
unit starts og stops.

9: Constant ON
If other heating systems of the house are not connected 

with the heat pump unit, or if there is a fire place, it may 
occur that the other heating systems, may stop the 
operation of the heat pump. Units without heat exchanger 
will blow external air directly into the house. By adjusting 
the set point to 1, the room sensor will be deactivated 
and the heat pump will be in constant use and blow in 
warm air when the external temperature is below the 
set minimum temperature in point 10. If the set point 
is adjusted to 0, the room sensor will regulate the heat 
pump regardless of the outside temperature.

10: Constant
If constant ON is activated, this ambient air 
temperature setting dictates the unit to change to 
constant operation if the actual ambient temperature 
is lower.
The set point may be set between 0° - 10° C.

11: Reduce ON
At very low ambient temperatures, it may be an 
advantage to reduce the supply air volume in order 
to improve the operating conditions of the heat pump 
and simultaneously achieve a higher supply of air 
temperature. By adjusting the set point to 1, the supply 
air volume will be reduced when the external temperature 
falls below the set temperature. If the set point is adjusted 
to 0, there will be no reduction of supply air volume 
regardless of the outside temperature. 

>>Opr thermostat

6  El. heater ON

7  El. heater

8  R6 function

Set point  �

  

Operations menu

Exit

OK

<

>

0.0

>>Constant ON  

10Constant

11Cooling ON

12Cooling  �

  

Set point

Operations menu

Exit

OK

<

>

0

 


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Optima 310

to 0, the unit will run at the 3rd speed until a lower speed 
has been selected manually.

18: Hour
If automatic stepdown at 3rd speed, is in use, the number 
of hours at which the unit is to operate with forced 
air, may be adjusted here. The set point may be adjusted 
between 1 – 10 hours.

19:Suppl.heating(El.orwaterheatedairflow)
By adjusting the set point to 0, the supplementary heat 
will not cut in, even if there is a need for it. If the 
set point is adjusted to 1, the supplementary heat will 
cut in, as needed. This is controlled by the room sensor 
in the control panel.

20: Solar col hyst
If a solar collector has been connected, a temperature 
difference may be set, which must be between the 
water temperature in the solar collector and the 
operating thermostat of the hot water tank, before 
the circulation pump of the solar collector is running. 
When the set temperature of the operating thermostat 
has been reached, the solar collector circulation 
pump will not run, even if the temperature difference 
is larger than the set value. The set point may be set 
between 0 - 5°C.

21:Airflow1SUP
Level 1 is the lowest speed which may be used when 
being out of the home, e.g. on holidays or weekends. 
Both fans may be set independently at all levels, to 
achieve the same air volume on the supply side as on the 
extract side, thus giving optimum operation. Initial 
adjustment of the unit must be performed with technical 
air measurement equipment, and may be done without using 
the main adjustment damper. Remember if the air volume is 
set lower than the minimum air volume in point 16, the 
heat pump will switch off. The provisional factory 
setting is 40%.

22:Airflow2SUP
Level 2 is the normal operating speed for the unit, 
providing the optimum internal climate and must be 
regulated to the ventilation needs of the individual home. 
The provisional factory setting is 70%.

12: Reduce sup. Air
If set point 1 has been selected under point 11, it is 
recommended that the external temperature is set to -
10°C.The set point may be set between 0 - -15°C.

13:Airflowsuppl.
It is recommended that the supply air volume is adjusted 
to 20% lower than the set value in menu point 22.

14: Filter change
The control system contains an integral timer which 
counts the time for which the unit has been in operation 

since the last filter change. It is recommended that the 
set point is initially set to 3, meaning three months. If the 

filters are too dirty, the set point may be reduced. If it is 

unnecessary to change the filters after three months, 
the set point may be increased. The set point may be 
adjusted between 1-6, equal to 1-6 months. When the 

timer reaches the set value for filter change, the red 

Genvex logo will begin to flash on the control panel and 

the words “change filter” will appear on the display. The 

Genvex logo will continue to flash until the filters are 

changed. When the filters are changed the filter timer 
can be reset by pressing ”enter ” in 10-15 sec. until the 

Genvex logo begins to flash again and the equipment is 
back in normal operation.

15: Hold ON-OFF

To avoid forgetting the change of filters allthough the 

Genvex logo is flashing on the control panel, the set 
point may be adjusted to 1. In this case, the unit will 

automatically stop after 14 days, if the filters have not 
been changed in the meantime. If this safety feature is 
not desired, the set point may be adjusted to 0, and the 

Genvex logo will keep on flashing until the filters are 
changed.

16:Min.airflow
To achieve optimum operation of the unit, the unit air 
volume must, as a minimum, conform to the values 
described in the brochure dealing with the actual unit. 
If the air volumes are set lower than the minimum 
requirement, the heat pump will stop and only pre-heated 
air will be blown from the heat exchanger into all rooms. 
The minimum air volume is set by the initial adjustment 
of the unit. The provisional factory setting, is meanwhile 
30%.

17:Extendedairflow
At 3rd speed, there is an option of making the unit step 
down automatically to the 2nd speed, after a number of 
hours, by adjusting to set 1. If the set point is adjusted 

>>Min. out. cool. ON

14Filter change

15Hold ON-OFF

16Min. airflow

Set point  �

  

Operations menu

Exit

OK

<

>

40

>>Airflow 1 SUP

22Airflow 2 SUP

23Airflow 3 SUP

24Airflow 1 EXT

Set point  �

  

Operations menu

Exit

OK

<

>

40

 


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Optima 310

23:Airflow3SUP
Level 3 is the highest speed and is in use when having 
many guests, when airing the rooms, having major activity 

in the kitchen, or if the unit is used for ventilating offices, 
institutions etc. The provisional factory setting is 100%. 
Remember that all over-ventilation is a waste of energy.

24:Airflow1EXH
Remember if the air volume is set lower than the 
minimum air volume in point 16, the heat pump will switch 
off.
The preset factory setting is 35%.

25:Airflow2EXT
The provisional factory setting is 55%.

26:Airflow3EXT
The provisional factory setting is 70%.

27: Clock ON
Please Notice: The adjustment of the weekly clock 

can easily be adjusted after manually filling out the 

weekly program scheme at page 42.
If it is wished to control the unit with the weekly clock, the 
set point must be adjusted to 1. The weekly clock allows 
the speed to be changed automatically up to 10 times 
per day, while at the same time the room temperature 
may be changed to a lower temperature for each change 
period than the set temperature in point 2. If the speed 
or room temperature is changed with the short-cut keys 
on the main menu, the weekly program will automatically 
cut in again, when passing the time of change. If it is 
desired only to change the speed and room temperature 
manually, the set point should be adjusted to 0.

28: Clock day
Starting the clock. Adjust the set point to the relevant day 
of the week.
Monday = 1, Tuesday = 2, Wednesday = 3, Thursday = 4, 
Friday = 5, Saturday = 6, Sunday = 7

29: Clock hour
Adjust the set point to the relevant number of hours.

30: Clock minute
Adjust the set point to the relevant number of minutes.

31-36:
When the marker “>>” is pointing to menus between 
18 and 23 the display heading changes to show actual 
changing point according to the following format: 
Changepoint, Weekday, Time. Example: “3 Monday 
20:36”
Before compiling a personal weekly program it may be a 

fine help filling out the week schedule included.

31: Change day
Adjust the set point at the actual day of the week, in 
which you wish to adjust the changeover times. Monday 
= 1, Tuesday = 2, Wednesday = 3, Thursday = 4, Friday = 
5, Saturday = 6, Sunday = 7

32: Change point
Adjust the set point to the desired changeover time. May 
be set up to ten times each day.

33: Change hour
Adjust the set point to the hour at which a changeover is 
desired.

34: Change minutes
Set the set point to the minute at which it is desired to 
perform the changeover.

35:Changeairflow
Adjust the set point to the level (speed) desired for this 
period of change.
Level 0: Ignore point
Level 1-3: Fan speeds 1-3.
Level 4: Set unit to stand by, only the controller is 
activated

36: Change room temperature
Adjust the wanted set point to the number of degrees 
lower, compared to the set room temperature in point 2 
for this changing period.

37: Copy day
It is possible to adjust the set point to copy the weekly 
program of the actual day to the one chosen by the 
setting. The actual weekday is shown in the top line. With 
this menu point you can choose which day you wish to 
copy to the actual day.

>>Clock hour

30Clock minute

31Change day

32Change point

Set point  �

  

Operations menu

Exit

OK

<

>

7

>>Airflow 2 EXH

26Airflow 3 EXH

27Clock ON

28Clock day

Set point  �

  

Operations menu

Exit

OK

<

>

55

>>Change hour

34Change minutes

35Change airflow

36Change room temp

Set point  �

  

Operations menu

Exit

OK

<

>

20

>>Copy day

38Default values

39Air + ON

40Stop the compressor

Set point  �

  

Operations menu

Exit

OK

<

>

0

 


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Optima 310

45: Water reg sec (Water heated supply air)
If a water after-heating coil has been installed in the 
supply air duct, it may be necessary to change the 
regulator time, which has a standard setting of 20 
seconds. The regulator time may be adjusted between 1 
– 250 seconds.

46: Heating reg min (Electrical heated supply air)
If an electric pre-heating or electric after-heating 
coil has been installed, it may be necessary to change 
the regulator time, which has a standard setting of 3 
minutes. The regulator time can be adjusted between 1 -30 
minutes.

47: Print vers.
Here it is possible to se the vers.number of the operating 
system

48: Not in use
The set point must be adjusted to 0.0

49: Not in use
The set point must be adjusted to 0.0

50: Stop defrosting
As standard, the defrosting period will stop when the 
cooling surface has reached a temperature of 5°C, which 
is the standard setting. In particular operating stages, 
it may be necessary to change this temperature. The 
temperature may be set between 0 - 10°C.

51: Temp dif.
As standard the temperature difference between start-
stop compressor is ±0,4°. Under special conditions, 
it will be an advantage to change the temperature 
difference. The difference may be set between 0,1-1,0°.

52: R9 function
This relay may be used as follows: 
If the setting is 0, the relay is off.
If the setting is 1, the relay is on when the unit runs.
If the set point is 2, the relay is on when additional 
heating is needed.

If the set point is 3, the relay is on when the filters 
need to be changed.
If the set point is 4, the relay is on when extra 
cooling is required.
If the set point is 5, the relay is on when T9 < the 
lower set temperature in point 42, or when T9 > actual 
temperature +1° and the adjusted temperature in point 2 
+ 1°. Is used to control if the fresh air is obtained 
through the ground collector or directly from the 
outside.

38: Default values

Please notice: Before resetting the values please 
ensure that the actual set points are noted in the 

scheme page 43.
Here is an option for re-adjusting the set points to default, 
in case the unit will not meet the requirements and 
the cause is impossible to locate. Note all set points in 
the schedule. Adjust the set point to 1 and press OK. 
Hereafter all set points will be adjusted to factory default, 
except the fan speeds and contrast settings.
To reset all to factory settings adjust the set point to 2 and 
press OK. It is now possible to start all over and adjust 
the set points. Remember to adjust fan speeds at Level 1, 
2 and 3 as previous, as these are the numbers to which 
the unit was initially adjusted.

39: Air +ON

In factory setting the heating priority is water tank first. If 
it is desired to heat the room before heating water, the 
setting must be changed to 1.

40: Not in use
The set point must be adjusted to 0.0

41: Desinfection function ON/OFF
By setting the point to 1, the electrical heating element 
will increase the water temperature to 65°C, once a week, 
in order to desinfect the tank. 

42: R9 Groundc temp
If a ground collector is connected to the equipment and 
menu 52 point 5 is ON, it is possible to regulate, what 
lower temperature the ground collector should be in 
operation. 
Setpoint can be set between 0° - 10° C.

43: T2 adjustment
It is possible to adjust the room sensor on the control 
panel so that the display shows the correct room 
temperature. The temperature may be set between -5 
- 0°C.

44: Program info
The set point is always 0. If you press OK; the display will 
show the installed program version for the heat pump. At 
the same time, an automatic exit will be made from the 
operating menu. 

>>Desinfect ON/OFF

42R9 E coll Temp

43T2 adjustment

44Program info

Set point  �

  

Operations menu

Exit

OK

<

>

0

>>Water reg sec

46Heating reg min

47Print vers.

48Not in use

Set point  �

  

Operations menu

Exit

OK

<

>

20

>> Not in use

50 Stop defrosting

51 Temp dif.

52 R9 function

Set point  �

  

Operations menu

Exit

OK

<

>

5

 


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8

 

Optima 310

53: Danish
      Select language

54: English
      Select language

55: German
      Select language

56: Polish
      Select language

>> Danish

54 English

55 German

56 Polish

Set point  �

  

Operations menu

Exit

OK

<

>

5

 


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Optima 310

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Monday

1.4 Week program scheme

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Tuesday

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Wednesday

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Thursday

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Friday

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Saturday

Hours

Minutes

Le-
vel

Red. T2

  1)

  2)

  3)

  4)

  5)

  6)

  7)

  8)

  9)

10)

Sunday

                       1.5 Defrost program

Before coil °C

Coil °C

15

-5

14

-5

13

-5

12

-6

11

-6

10

-7

9

-7

8

-8

7

-8

6

-9

5

-10

4

-10

3

-11

2

-12

1

-12

0

-13

-1

-14

-2

-14

-3

-15

-4

-15

Red. T2 = Reduced Room temperature

 


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10

 

Optima 310

Factory setting:

Date:

Date:

Date:

1

0

2  

21

3

0

4

0

5  

52

6

0

7

50

8

0

9

0

10

5

11

0

12

-10

13

50

14

3

15

0

16

30

17

0

18

5

19

0

20

5

21

40

22

70

23

100

24

35

25

55

26

70

27

0

28

1

29

0

30

0

31

1

32

1

33

0

34

0

35

0

36

0

37

0

38

0

39

0

40

0

41

0

42

0

43

-3

44

0

45

20

46

3

47

0

48

0

49

70

50

5

51

0,4

52

0

1.7 Factory default scheme

1.6 Special functions

Summertime:
Changing the clock between summer- and wintertime is 
done by simultaneously pressing “Enter” together with 
“Arrow Up” or “Arrow Down”. This will change the clock 
hour by 1 hour in the desired direction.

Contrast adjustment:
Contrast of the display can be changed by pressing the 
“Info” button while the program info screen is displayed. 
Use the arrows to adjust up or down. You can also enter 
menu 44, press OK and then hold the info button until the 
display reads “contrast adjust”, and adjust the contrast 
with “arrow up/arrow down” button. After 4 seconds the 
contrast adjusting menu is closed.

Program sub-version number:
Pressing “Arrow Up” when the program info screen is 
displayed will also show sub-version of the controller. Or 
it is possible to enter through the menu 44, press ok and 
then “arrow up”

 


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11 

Optima 310

2. Function

2.1 Description Optima 310

A Combi unit is used for heating up domestic water and 
supply air, to provide partial cover of the ventilation and 
basic ventilation heating needs in the home. 

1: Domestic water heating
The domestic water temperature is controlled by sensor 
T8, which is mounted at the base of the tank. When 
the need for heating of domestic water arises, the 
compressor starts, the magnetic valve MA 3 and MA 
6opens and the water is heated to the temperature set 
(point 5 in the operating menu).

2: Room heating
By room heating the magnetic valve MA 2 and MA 5 is 
activated.The room temperature is controlled by room 
sensor T2, mounted on the control panel. If, for example, 
this temperature has been set to 21°C, the compressor 
will start up when the room temperature has fallen to 
20.6°C. When the compressor has heated the room 
temperature up to 21.4°C, the compressor will stop. If 
the compressor cannot maintain the room temperature, 
the motor valve (unit with water after heating coil) will 
begin to perform temperature control (PID control) when 
the room temperature has fallen to 20°C. For units with 
electric after heating coils (level 1), this will cut in when 
the room temperature has fallen to 20°C. When the room 
temperature again reaches 20°C, the electric heat will 
switch off. Units with electric pre-heating coils will control 
the same way as units with after heating coils.

3: No heating needs
When there is no need for either water heating or room 
heating, the compressor will stop, while the fans continue 
to run. The heat in the extract air is recovered in the 
counter current heat exchanger and transferred to the 
supply air.

4: Defrosting
When the temperature difference between the 
temperature upstream of the cooling coil and the 
temperature of the cooling coil becomes too large, as 
happens when ice is formed on the cooling surface, the 
unit goes into defrost mode. The magnetic valve MA 4 
opens and the supply air fan and the electric heating coil, 
stops until the ice has melted and the cooling coil has 
reached a temperature of app. 5°C. Then the magnetic 
valve closes again and the supply air fan and electric 
heating coil restart operation.

2.2 Extra capacity

Electric element:
If the hot water need is larger than the coverage of the 
Combi, the electric heating element may be set to ON 

in the main menu with a short-cut key. When the electric 
heating element is ON, sensor T7, mounted in the middle 
of the tank, will control heating up the upper half to the 
set temperature (point 7 in the operating menu)

2.3 Operation safety

High pressure switch:
To prevent the compressor exceeding its range of 
application, there is an integral high pressure switch, 
which interrupts when the pressure becomes too large. 
Activate the red reset button once the cause of the error 

has been identified.

Circuit safety breaker:
If an error should occur in the electric heating element, 
the safety breaker thermostat will disable the heater. To 
reset the safety breaker the centre button of the safety 
breaker must be pressed. The safety breaker is located 
on the heater. (Remember to disconnect the power 
supply to the unit, before any work is carried out)

Override control of supply air fan:
If the supply air temperature rises to over 45°C, the 
speed of the supply air fan will begin to rise, in attempt to 
stabilise the supply air temperature at 45°C.

2.4 Warnings

Filter timer

To ensure that the filters are changed, and an optimal 

operation is maintained, the controller has a filter timer 
(please se point 14 and 15). When the timer reaches 

the chosen value the display will read “change filter” and 

the red Genvex logo will flash until the filters has been 
changed.

Data error
This error will be shown, if no communication is possible 
between the display and controller. Please control the 
cable connection on the clips 21 – 24.

Frost alert
This error is shown if a water coil is installed in the 
system and the temperature of the water coil is to low. 
Then there is a risk of frost damage. The controller will 
stop the unit and open the valve to the water coil to keep 
the coil warm.

Pressure switch error
When the high pressure switch interrupts, the display will 
read “Pressure switch error” and the red Genvex logo will 

flash until the red reset button is activated.

 


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12

 

Optima 310

3.2 Servicing

Filters:

When the red lamp on the control panel flashes, the filters 
must be changed/cleaned. Stop the unit with the switch 
on the unit or the electrical panel. Open the front cover 

and take out the filter. When the filter has been changed 
or cleaned by shaking it and by removing the worst dirt, 
switch on the unit and press the enter button on the 
control panel for 10-15 seconds until the Genvex logo 

starts flashing again and the equipment is back in normal 
operation.

Careful handling of the plates is required. They 
have sharp edges and must not be damaged.

Do not vacuum or clean at high air pressure. It 

willdamagethefilter!

Condensate drain:

When changing the filters in the autumn season check the 
condensate drain and tray for blockage by dirt. Fill water 
in the condensate tray and check that the water runs out 
unhindered. Should this not be the case the drain must 
be cleaned. At the same time make sure that the plates of 
the evaporators are clean.

Counter current heat exchanger:
Inspect the counter current heat exchanger every three 
years. If it is dirty, remove it and wash in warm soapy 
water and then rinse, possibly in the bathroom using the 
shower head.

Fans:
Every three years check the two fan wheels for dirt. If 
they are dirty they must be cleaned with a brush, bottle 
washer etc. Please notice that the balance weight of the 
fan wheels are not removed causing an unbalance and 
thereby a higher noise level and abrasion of the fans.

Supply and extract valves:
Clean the valves by wiping with a dry cloth. Make sure 
the valve does not rotate, causing a change in the air 
volume.

3. Maintenance

The following instructions must be followed in order to 
ensure optimum operation of the Combi:

THE POWER SUPPLY TO THE SYSTEM 
MUST ALWAYS BE SWITCHED OFF BEFORE 
OPENING THE COVER. 

When the unit has been installed for the first time 
make sure the water drains are checked after a few days 
to make sure they are performing well. 

Environmental considerations
When the unit is being serviced or its operation is 
cancelled, please make sure to follow the guidelines 
for recovery and disposal of all materials according to 
local procedures and laws. 

3.1 Connecting to computer

In order for the optima 310 to communicate with 
the computer (data logger) the communication box 
“Genvex data logger” has to be installed between 
the controller and the computer. The data logger is 
accessory equipment and can be required at Genvex A/S.

 

Cable acces (bottom rear)

                          back side

A: Terminal block. Power connection.
B: Room sensor T2.
C: Communication plug to computer (data logger). CTS unit
D: Data collection IC circuit (Red).
E: Processor control panel.
F: Battery.
G: IC circuit (black).

Between the unit and the control panel a light current 
cable 4 x 0.25 mm2 should be mounted. The maximum 
cable length is 30 m.

70

120

25

C

I

ON/OFF

Room temperature

21.5

o

C

Wednesday

12:18

24
23
22
21

D

B

C

E

F

A

G

G4  =  Standard filter  

(Coarse filter class G4)

F5  =  Fine filter (Fine filter class F5)

F7  =  Pollen filter (Fine filter class F7)

 


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13 

Optima 310

3.3 Water circuit and tank

Safety valve:

The installer have fitted a safety valve on the cold 
water supply pipe for the hot water tank. This valve is a 
protection of the tank against excess pressure when the 
domestic water expands during heating. The non-return 

valve, which is fitted before the safety valve on the cold 

water pipe, prevents the water from flowing back into 
the cold water pipe. This means that the pressure in the 
tank will increase to the maximum pressure permitted by 
the safety valve, at which point it will open and allow the 
surplus water to escape. If the safety valve did not open, 
the tank would burst. 
To make sure that the safety valve is working properly, 
it should be inspected several times a year. To do this, 
press the spring-loaded arm on the safety valve and 
see if water comes out of the valve. Damage caused 
by a blocked safety valve is not covered by the Genvex 
warranty.

Anode:
In order to prevent corrosion of the enamelled hot water 

tank, the tank is fitted with a magnesium anode with a 
¾“ screw plug. This anode has an estimated life time 
of 2-5 years. It is nevertheless important to check that 
the anode is intact at all times. This should be done by 
inspecting the anode every 2 years and replacing it if 
it is corroded and measures only 6-10 mm in diameter. 
To inspect the anode, turn off the power supply to the 
system and remove the front cover. The hot water tank 
has to be drained before the anode can be unscrewed. To 
do this, turn off the cold water supply and then attach a 
hose to the drain cock so that the water can be disposed 
of down the nearest drain. When draining the water from 
the tank, turn on a hot water tap to prevent negative 
pressure in the tank. When the tank is empty, the anode 
can be unscrewed and inspected. When the anode has 

been fitted again, close the drain cock and turn the cold 

water supply back on to fill the tank with water. When the 
tank is full and the cover back on, the power supply can 
be switched on again.

3.4 Demounting

The following actions must be taken:
Disconnect the power supply to the unit and disconnect 
other connections. Shutoff the fresh water supply valve 
and connect a drain hose to the drain valve in order to 
drain the water. While draining, a hot tap water valve 
should be opened to avoid under pressure in the tank.
The air duct connections are uninstalled and remaining 
air channels must be closed to avoid condense water 
entrance to the building.

 


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14

 

Optima 310

4.Faultfinding

The unit is equipped with the following safety equipment:

4.1 High pressure switch:

To prevent the compressor exceeding its range of 
application, there is an integral high pressure switch, 
which interrupts when the pressure becomes too high. 
In case of interruptions (too high pressure) the red light in 

the control panel will flash and the high pressure switch 
will stop the heat pump. The red light lights. Restart 
the equipment by manually resetting the high pressure 
switch.

For manually resetting the high pressure switch. The 
front door can be removed by releasing the screws.

4.2 Safety breaker for electrical water 
heater

The safety breaker protects the equipment against 
overheating during heating with the electrical heating 
element. The safety breaker is mounted on the heater. If 
the adjusted value (90°) is exceeded the heating coil will 
disconnect. It can be reconnected when the temperature 
is below 90°. To do this, the power to the equipment must 
be off, front door dismantled and the front cover of the 
heating element dismantled. The reset button can now 
be pressed.
Please notice: Be careful not to damage or tear the 
cables to the control.

4.3 Heat pump will not operate
Unit has stopped:

Please control:

is the unit connected to the power circuit?

• 

is power present in the electric outlet?

• 

is the heat pump disconnected by the temperature 

• 

control?
is the water temperature >55°?

• 

is the cable between the control and the control panel 

• 

installed?
has the high pressure switch switched?

• 

is the filter changed?

• 

Condensate running out of appliance:
Error:

Condensate drain blocked by dirt

• 

4.4 Air faults

No supply air to living rooms:
Error:

Defective fan

• 

Blocked bag filter

• 

Fresh air grill blocked by dirt and leaves in the 

• 

autumn or snow and ice in the winter.
Fuse on control circuit board has blown

• 

No extract air from wet rooms:
Error:

Defective fan

• 

Blocked flat filter

• 

Fuse on control circuit board has blown

• 

Roof diffuser is blocked by snow and ice in the winter

• 

Cold supply air:
Error:

Counter current heat exchanger is blocked with dirt 

• 

or ice
Extract fan defective

• 

Extract filter blocked

• 

Heat pump defect

• 

Cooling coil blocked with ice

• 

Control panel or circuit board defect

• 

Sensor defect

• 

For RESET
press the 
red pin

For RESET
press the 
white pin

 


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15 

Optima 310

 


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Genvex World Wide:

www.genvex.dk

Intelligent  ventilation  appliances  from 

Genvex

As a ventilation specialist, our spectrum of innovative ventilation 
engineering solutions: From passive ventilation appliances with 
highly  efficient  counterflow  heat  exchangers,  to  machines  with 
integral  heat  pumps,  able  to  heat  and  cool  at  the  lowest  cost. 
Ceiling appliances for retrofitting in office and residential blocks 
are also available.

Want to know more? Write or give us a call!

Austria

J.Pichler Lufttechnik GmbH 

     

A-9021 Klagenfurt
Tel.: +43 (0) 463 / 3 27 69
Fax: +43 (0) 463 / 3 75 48
E-Mail: office@pichlerluft.at

Belgium

 

Artiklima bvba
B - 9220 Hamme
Tel.: +32 (0) 52 41 25 41
Fax: +32 (0) 52 41 29 66
E-Mail: info@artiklima.be

Croatia

Pichler & CO d.o.o.
10000 Zagreb
Tel.: + 385/ (0) 1/ 65 45 407 
Fax: + 385/ (0) 1/ 65 45 409
E-Mail: pichler@zg.hnet.hr

Denmark

Genvex A/S
DK - 6100 Haderslev
Tel.: +45 73 53 27 00
Fax: +45 73 53 27 07
E-Mail: salg@genvex.dk

Germany

Novelan GmbH
D-95359 Kasendorf
Tel.: +49 (0) 92 28 / 99 60 7-0
Fax: +49 (0) 92 28 / 99 60 7-189

E-Mail: info@novelan.de

Great Britain 

Total Home Environment Ltd
GB- Moreton in Marsh, GL 56 0JQ
Tel.: +44 (0) 845 260 0123
Fax: +44 (0) 1608 652490
E-Mail: genvex@totalhome.co.uk

Ireland / N.I.

ECO Systems Ireland Ltd
Co. Antrim BT54 6PH
Tel.: (UK 028) (ROI 048) +44 2076 8708 
Fax: (UK 028) (ROI 048) +44 2076 9781
E-Mail: info@ecosystemsireland.com

Norway

 

Beam Sentralstøvsuger A/S
N - 1313 Vøyenenga
Tel.: +47 - 67 17 77 00
Fax: +47 - 67 17 77 10
E-Mail: info@beam.no

Portugal

Iberterm
PT-4475-493 Nogueira Maia
Tel: +351 229 065 123/4
Fax: +351 229 065 125
E-Mail: paulo.neto@iberterm.com
Web: www.iberterm.com 

Slovenia

  

Pichler & CO d.o.o.
2000 Maribor
Tel.: +386/ (0) 2/460 13 50
Fax: +386/ (0) 2/460 13 55
E-Mail: pichler@pichler-co.si

Switzerland

  

SM-HEAG Klimatechnik AG
CH-8307 Effretikon
Tel.: +41 (0) 52 / 355 11 00
Fax: +41 (0) 52 / 355 11 05
E-Mail: info@sm-heag.ch

Published by Genvex A/S, Sverigesvej 6, DK-6100 Haderslev

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