enervent Neo series User manual

23 October 2017
Enervent Neo
Ventilation unit installation instructions

2
Copyright © Enervent 2017.
Unauthorised copying and distribution is forbidden.

3
Professional installation instructions
CONTENTS
READ FIRST ................................................................................................................4
Type plate .............................................................................................................5
SAFETY ....................................................................................................................6
General ................................................................................................................6
Electrical safety ........................................................................................................6
CONTENTS OF THE DELIVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Available accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TECHNICAL SPECIFICATIONS OF THE UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Duct connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Checking the handedness in the type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
BEFORE INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Choosing the installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION ............................................................................................................11
COMMISSIONING .........................................................................................................13
Requirements.........................................................................................................13
Adjustment of air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Commissioning checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
The control system and the eWind operation panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Important information on the control system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the operational parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Data screen ...........................................................................................................17
eWind info list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Measurement display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
eWind measurement list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Commissioning documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installation to the Modbus network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting ......................................................................................................20
APPENDICES..............................................................................................................22
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Left-handed .......................................................................................................22
Right-handed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
External connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electrical after heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
EU-Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Quick guide ..............................................................................................................28

4
READ FIRST
This instruction manual is intended for all people
involved in the installation of the Enervent ventilation
units. Only professionally skilled persons may install the
equipment described in this manual, according to the
instructions provided in this manual and to the local laws
and regulations. Failure to comply with the instructions
provided in this manual will result in cancellation of the
warranty for the equipment and may cause personal and
material damages.
The equipment described in this manual may not be
used by persons (including children) with reduced
physical, sensory or mental capacity or without sufficient
experience or knowledge, unless a person responsible for
their safety is supervising and advising in the use of the
equipment.
Should the delivery not contain all of the
components listed in the section ‘Contents of
the delivery’, please check the order and contact
your distributor or Enervent before commencing
installation.
FOR YOUR INFORMATION

5
Professional installation instructions
Should you need any technical support, refer to the type
plate for the equipment type and serial number.
TYPE PLATE
ilmanvaihtolaite
ventilation unit
TYYPPI/TYPE:
W/ V/ HZ / A:
www.enervent.com
SRJ. NRO/SERIAL NO:
IP 20

6
SAFETY
General Electrical safety
Always check that the equipment supply voltage
is switched off before opening the service hatch.
Only an authorised electrician may open the
electrical box.
Follow the local regulations on electrical
installations.
In case of malfunction, always find out the reason
for the malfunction before starting the unit again.
Wait for two (2) minutes after switching off
the power of the unit before commencing the
maintenance. Although the power is switched off,
the fans continue running and the after-heating
coil stays hot for a while.
Check that the unit is entirely isolated from the
mains before conducting any voltage tests,
insulation resistance measurements or other
electrical work or measurements. Such work may
damage the sensitive electrical devices.
Control devices used in the ventilation units may
cause leakage current. It may affect the operation
of the residual current devices.
All ventilation units with a control system must be
equipped with an over-voltage arrester.
DANGER DANGER
DANGER
WARNING
WARNING CAUTION
CAUTION
CAUTION

7
Professional installation instructions
CONTENTS OF THE DELIVERY
Product number Product name
K580040001 eWind controller. The package contains a controller, surface mounting box and a 10-metre
cable
K930030004 CO2carbon dioxide transmitter to room 0-10 V / 24 V
K930030006 %RH humidity transmitter 0-10 V / 24 V
M230110002 Humidity transmitter to channel KLK100
K930030008 Push-button over-pressure ‘fireplace switch’/boost
K930030029 KNX bus adapter
K240130301 Range hood Standard Plus white
K240130302 Range hood Standard Plus stainless steel
K240130201 Range hood Premium white
K240130202 Range hood Premium stainless steel
K930040216 Neo duct template, right
K930040216V Neo duct template, left
Available accessories
warranty and
maintenance
manual
anti-vibration
rubber mounts
installation
and operating
instructions
unit
power cable

8
TECHNICAL SPECIFICATIONS OF THE UNIT
connection cable with plug
Width 540 mm
Depth 552 mm
Height 1,035 mm
Weight 58 kg
Duct connection ø160 mm duct size
Range hood duct connection ø80 mm duct size
Control card fuse 5 x 20 mm glass tube fuse T0,8 A
Fans supply 83 W, 0.75 A; extract 83 W, 0.75 A
Heat exchanger motor with thermal protection 5 W, 0.04 A
Mains supply 230 V 50~, 10 Hz
Power of electric after-heating coil in E-models 1,050 W / 230 V, 1~/50 Hz/ 4.6 A
Input power 174 W / 230 V, 1~/50 Hz/ 1.6 A
Input power, E-model (after-heating coil) 1,224 W / 230 V, 1~/50 Hz/ 6.2 A
Circuit breaker B16 A
motherboard
control panel
inlets for external sensors
type plate
heat exchanger
extract fan
extract filter M5
heat exchanger’s drive belt
heat exchanger’s spare belt
supply fan
flow screen
electric after-heating coil
supply filter F7
condensate connection G 1/4" female thread
left-handed

9
Professional installation instructions
Duct connections
Checking the handedness in the type plate
left-handed
supply air
range hood
outdoor air
exhaust air
right-handed
exhaust air
range hood
extract air
supply air
outdoor airextract air
ilmanvaihtolaite
ventilation unit
TYYPPI/TYPE:
W/ V/ HZ / A:
www.enervent.com
SRJ. NRO/SERIAL NO:
IP 20
ilmanvaihtolaite
ventilation unit
TYYPPI/TYPE:
W/ V/ HZ / A:
www.enervent.com
SRJ. NRO/SERIAL NO:
IP 20
NEO EWIND E LEFT NEO EWIND E RIGHT
Right-handedLeft-handed

10
BEFORE INSTALLATION
Choosing the installation location
• Ensure that the ventilation system is planned and
implemented as per the building regulations.
• We recommend installing the unit in the engineering
and utility services room
• Do not install the unit in a room with high
temperature and humidity. Certain conditions may
cause condensation on the outer surface of the unit.
• Consider the noise level of the unit when choosing
the installation location.
• Install the unit on a soundproof wall if possible.
• Do not install the ventilation unit directly outside
the bedroom as the unit is never completely silent,
although it is quiet.
• Install an insulating sheet behind the ventilation unit
or try to prevent the sound from being conducted to
the structure by other means. Soft foam plastic sheets
are recommended (not included in the delivery).
• Ensure that connecting of the condensation water
discharge pipe and water trap is possible. Take into
account the space required by the condensation
water connection.
• Install the unit in a warm room (over +5°C).
• Ensure that there is min. 550 mm space in front of
the unit and min. 80 mm space under the unit for
maintenance.
If you want more information on building of
ventilation systems and insulation of ventilation
ducts, read more on our website at
www.enervent.com.
DO YOU WANT MORE INFORMATION?

11
Professional installation instructions
INSTALLATION
A
B
2
3
5
7
1
4
6
A = min. 25 mm, B = min. 75 mm
Check before installation of the ventilation unit
that there are no foreign objects in the ventilation
unit or in the duct system.
FOR YOUR INFORMATION
58kg
!
anti-vibration rubber mounts
condensate connection
G 1/4" female thread

12
8a
9a
10a
8b
9b
10b

13
Professional installation instructions
COMMISSIONING
Requirements
Operational requirements for the ventilation unit:
• Supply and extract air temperature below +55 °C.
• Extract air temperature at least +10 °C
• Supply air temperature after heat recovery over +5 °C
• Supply air temperature over +10 °C
• All foreign items have been removed from the
ventilation system.
• Both fans are running.
Adjustment of air ow
After starting the unit, the air flows must be adjusted to
the designed values.
• The air flows are adjusted during commissioning of
the unit.
• The adjustment is made individually for both fans in
each operation mode (= fan speed).
Check the following during adjustment:
• All filters are clean.
• All supply and extract air vents, roof inlet and outside
air grilles are in their positions.
To achieve optimum adjustment values, the air flows
must be measured at each duct opening. A suitable
measurement device is a thermoanemometer or a
differential pressure gauge. The measured values can be
used to adjust the air flow to match the design values.
A correctly adjusted ventilation unit is quiet and provides
a good thermal economy. It also maintains a moderate
underpressure in the house. The negative pressure
prevents humidity from entering into the walls and
ceiling.
Measure Inspected Notes
The device has been installed according to the installation
instructions provided by the manufacturer.
The condensation water discharge pipe has been connected to
the water trap and the operation has been tested.
Silencers have been installed in the supply and extract ducts.
The terminal devices have been connected to the duct system.
The outside air grille has been installed for a supply of fresh air.
NOTE: Do not cover the grille with a mosquito net. It makes
cleaning difficult.
The device is connected to an appropriate electricity supply.
The ventilation ducts are insulated as per the ventilation plan.
Commissioning checklist
Do not cover the outside air grille with a mosquito
net.
FOR YOUR INFORMATION

14
3
5
4
1
2
6
The control system and the eWind operation panel
1. Mode (in standard
display)
2. Temperature (in standard
display)
3. Mode button
4. Eco button 5. Temperature button 6. Cable connection
Important information on the control
system
The factory settings are suitable for most installations.
The fan speed settings for various operating modes
are installation specific and must be specified and set
individually in each installation. In other cases, the factory
setting must not be changed unless otherwise instructed
in the ventilation system plan.
Make sure that all necessary information is available before
starting to adjust the settings.
Setting the operational parameters
The fan speed settings for various operation modes must
be specified and set individually in each installation. Refer
to the settings in the parameter table.
1Simultaneously press buttons and three
times.
2Using buttons and , choose parameters
c1-c32.
• Refer to the meaning of each parameter in "Parameter list" on
page 15.
3Choose the parameter for adjustment by pressing
button for 3 seconds.
4Change the parameter value using buttons
and .
5Confirm the value and return to the selection of
parameters c1–c32 by pressing button .
6Exit the settings by simultaneously pressing
buttons and .

15
Professional installation instructions
Parameter list
Parameter Description Factory
setting Note Modbus register
Field
setting
c1 Extract fan speed, mode 1,
Control range: 20–100 %, step: 1 %
36 % Away mode 102
c2 Supply fan speed, mode 1,
control range: 20–100 %, step: 1 %
35 % Away mode 100
c3 Extract fan speed, mode 2,
control range: 20–100 %, step: 1 %
56 % Home mode 52
c4 Supply fan speed, mode 2,
control range: 20–100 %, step: 1 %
55 % Home mode 51
c5 Extract fan speed, mode 3,
control range: 20–100 %, step: 1 %
83 % Max. power also in humidity and
carbon dioxide removal
74
c6 Supply fan speed, mode 3,
control range: 20–100 %, step: 1 %
80 % Max. power also in humidity and
carbon dioxide removal
72
c7 Extract fan speed, mode 4,
control range: 20–100 %, step: 1 %
100 % Manual boosting 68
c8 Supply fan speed, mode 4,
control range: 20–100 %, step: 1 %
100 % Manual boosting 67
c9 Time limit for manual boosting (mode 4)
control range: 1...4 h, step: 1 h
2 h 66
c10 Extract fan speed, fireplace/range hood mode
control range: 20–100 %, step: 1 %
30 % 55
c11 Supply fan speed, fireplace/range hood mode
control range: 20–100 %, step: 1 %
50 % 54
c12 Time limit for fireplace mode/selection of range hood
control range: 0...15 min
step: 1 min
10 min Setting time limit of 0 min replaces the
fireplace mode with the range hood
mode.
56
c13 Heat recovery defrosting on or off Off Coil 55
c14 Service reminder interval
4 or 6 months
4 Register value in days 538
c15 CHG/AGH preheating and AGH precooling,
on or off
On Coil 58
c16 CHG/AGH external temperature TE01, below
which the preheating is used
control range: 0…10 °C, step 1 °C (for
preheating)
5 °C 592
c17 CHG/AGH preheating is not in use when the outdoor
air temperature (TE01) rises above value (c16) + (c17)
control range: 1…5 °C, step 1 °C
1 °C 593
c18 CG cooling or CHG precooling on/off On Applies to CG and CHG heat
exchangers
Coil 52
c19 Outdoor temperature TE01, above which
precooling/cooling is allowed
17 °C 164
c20 AGH outdoor temperature, above which the
earth duct is used
control range: 15…25 °C, step 1 °C, (for
precooling)
20 °C 629
c21 AGH precooling is not in use when the
outdoor air temperature (TE01) drops below
value (c20-c21)
control range: 1…5 °C, step 1 °C
2 °C 630
c22 Temperature setting for air temperature after
the electric preheating
control range: –10…–20 °C, step: 1 °C
–15 °C 591
c23 Boosted operation in order to remove
humidity
on or off
On Coil 19
c24 Threshold value of summer/winter temperature,
control range –10…+10 °C, step 1 °C
4 °C The 24-hour average temperature of the outdoor air.
Above the threshold value the boosted operation
for removing humidity is in summer mode, and
below the threshold value it is in winter mode.
137

16
Parameter list
Parameter Description Factory
setting Note Modbus register
Field
setting
c25 Threshold value for humidity removal,
control range 10…100 %RH, step 5 %
45 % In winter mode, the boosted operation
for humidity removal is started when the
humidity value exceeds the threshold value.
69
c26 Threshold value for humidity removal, control
range: 5…30 %, humidity exceeds the
48-hour average value, step 5 %
15 % In summer mode, the boosted operation
of humidity removal is started when the
relative humidity exceeds the 48-hour
average value of humidity by the amount of
the threshold value.
70
c27 Boosted operation in order to remove carbon
dioxide
on or off
Off Coil 21
c28 Threshold value for carbon dioxide removal,
control range: 600...1,200 ppm, step: 100 ppm
1,000
ppm
76
c29 Boosted operation in order to remove
humidity, using the rotating heat exchanger
on or off
Off Coil 24
c30 Display dimmed in standby mode
on or off
Off Panel-specific setting off: display is dark in
standby mode,
on: dimmed display in standby mode.
Internal
c31 Modbus address of the automation
motherboard
control range: 1...99, step: 1
1 640
c32 Modbus route speed
1 = 9,600, 2 = 19,200, 3 = 115,200
2 19 200 bps 733

17
Professional installation instructions
3Simultaneously press buttons and once.
eWind info list
Marking Denition
n0 Standard mode is on
n1 Boosted ventilation to remove humidity.
n2 Boosted ventilation to remove carbon
dioxide.
n3 Heat recovery is on
n4 After-heating with electric coil is on
n5 Outdoor air preheating with CHG/AGH or
with electric preheat coil is on
n6 CG, CHG or AGH cooling of the supply air is on
n7 Cold recovery with the rotating heat
exchanger is on
n8 The ventilation is boosted manually
n9 Away mode is on
n10 Humidity removal with rotor is on
n11 Defrosting is on
n12 Eco mode is on
n13 Service reminder; the time remaining for the
next filter replacement in days
n14 Device is starting
1Simultaneously press buttons and once.
• Parameter (n1..nn) is displayed.
2Browse the Info list, using buttons and .
Return to the standard view:
eWind info list
Opening:
Data screen
You can view the available functions in the eWind info list displayed on the data screen.
If you do not press any button, the menu will close
after 5 minutes and the panel will return to the
standard display.
FOR YOUR INFORMATION

18
Measurement display
You can monitor temperature, humidity, heat recovery
efficiency and other measurement values in the eWind
measurement list, displayed in the measurement display.
eWind measurement list
Marking Denition
Marking in the
diagram and
connection on
the automation
motherboard
Note Modbus
register
r1 Outdoor air temperature, °C TE01 All models 6
r2 Supply air temperature after heat
recovery, °C
TE05 All models 7
r3 Supply air temperature, °C TE10 All models 8
r4 Extract air temperature, °C TE30 All models 10
r5 Exhaust air temperature, °C TE32 All models 9
r6 Return water temperature of water-based
heating coil, °C
TE45 eWind W only. Other models
display ‘0’.
12
r7 Temperature of pre-heated outside air
(CHG/AGH/electric preheat coil), °C
TE02 Only if equipped with CHG/AGH
or electric preheat coil.
32
r8 Relative humidity (RH) of extract air RH30 All models 13
r9 Carbon monoxide level, ppm Without an external carbon
dioxide sensor (accessory), ‘- -’ is
displayed
23
r10 Measurement of external relative
humidity, %RH
Without an external humidity
sensor (accessory), ‘- -’ is
displayed
23
r11 Temperature efficiency of the supply air
temperature heat recovery, %
All models
Calculated value
29
r12 Temperature efficiency of the extract air
temperature heat recovery, %
All models
Calculated value
30
Commissioning documentation
• Fill in the commissioning checklist on page 13.
• Fill in the maintenance manual.
• Mark the changes you have made to the factory
settings in the column Field setting in table
"Parameter list" on page 15.
• Fill in the air volume measurement document.
1Simultaneously press buttons and two
times.
• Parameter (r1..rn) and the parameter values are displayed.
2 Browse the parameter list up or down, by pressing
button or .
eWind measurement list
Opening:
1Simultaneously press buttons and once.
Return to the standard view:
The warranty is not valid for units with no
documented air volume measurement.
It is extremely important to note all changes
made to the parameters. This ensures that there
are backup copies of the information in case
the automation is damaged (for example, by a
lightning strike).
FOR YOUR INFORMATION

19
Professional installation instructions
Do not connect any external network to the
motherboard before programming the route so
that it is compatible with the device control.
CAUTION
Installation to the Modbus
network
The ventilation unit can also be controlled via the Modbus
connector X26.
The Modbus specification:
• Modbus address 1 (default)
• Data transmission protocol RS485
• The Modbus traffic via the motherboard’s Modbus
connector X26
• Speed 9,600, 19,200 or 115,200 bps
• 8-bit
• No parity or parity.
The order of the poles in the Freeway connector is marked
on the controller board.
The Modbus registers are available on the Enervent web-
site www.enervent.com.
X26
Setting of Modbus parameters in the
control system
1Simultaneously press buttons and three
times in the control panel.
2Using buttons and , choose parameters
c31-c32.
• Refer to the meaning of each parameter in "Parameter list" on
page 15
3Choose the parameter for adjustment by pressing
button for 3 seconds.
4Change the parameter value using buttons
and .
5Confirm the value by pressing button .
6Exit the settings by simultaneously pressing
buttons and .

20
Alarm Description Alarm
limit Symptoms Possible cause Measure Notes
FILS Service
reminder.
4 or 6
months
It is time for regular maintenance. Replace the filters.
Inspect the ventilation unit.
Clean as necessary.
See if there are any dam-
ages visible.
Acknowledge by
pressing any button
for 5 seconds.
Err Sensor
malfunction.
The sensor is in short circuit or
there is an interruption in the
circuit.
Check the connections and
cables of the sensors.
- - - - Downloading. The eWind panel downloads
data from the motherboard.
Normal during start-up. In
other situations, check the
eWind connection cable.
oFFE Stop mode. Ventilation off. External control system has
switched the ventilation unit to
stop mode.
AL1 Water heat-
ing coil is in
danger of
freezing.
+8 °C Cold supply air. The water coil is frozen/about to
freeze:
• The circulation pump has
stopped.
• The heat exchanger does not
rotate.
• The control valve actuator of
the water coil is faulty.
• The extract fan has stopped.
Restart the pump.
Replace the motor or the
belt.
Replace the actuator.
Find out the reason/replace
the fan.
The unit will not
start until the alarm
mode is cleared and
the alarm reset by
pressing a button in
the operation panel.
AL2 The supply
air is cold
after the
rotating heat
exchanger.
+5 °C Cold supply air. The heat exchanger does not
rotate:
• The drive belt is damaged.
• The drive belt skids.
• The heat exchanger motor is
damaged.
Replace the drive belt.
Clean or replace the belt
and the heat exchanger.
Replace the heat exchanger
motor.
The ventilation
unit switches to
malfunction mode,
in which the fans
operate with mini-
mum power.
The alarm is auto-
matically reset
when the fault is
cleared.
AL3 Cold supply
air.
+10 °C Cold supply air. The extract fan has stopped. Replace the fan.
The extract filter is clogged. Replace the filter.
The ventilation is adjusted incor-
rectly/not adjusted at all.
Adjust the ventilation as per
the ventilation system plan
with appropriate measure-
ment tools.
The heat insulation of the ducts is
insufficient.
Check the insulation thick-
ness of the supply and
extract air ducts and add
insulation as necessary.
The fan speed of the ventilation
unit is incorrect.
Always use a fan speed
specified by the ventila-
tion unit designer (also in
winter).
AL4 Supply fan
malfunction.
No supply air. The supply fan has stopped. Repair or replace the supply
fan.
The unit will not
start until the alarm
mode is cleared and
the alarm is reset by
pressing a button in
the operation panel.
AL5 Extract fan
malfunction.
No extract air. The extract fan has stopped. Repair or replace the extract
fan.
Troubleshooting