Vaillant VC 156/5-7 User manual

Operating instructions
ecoTEC exclusive
VC 156/5‑7 (N-DE)
VC 216/5‑7 (N-DE)
VC 246/5‑7 (N-DE)
VC 276/5‑7 (N-DE)
VC 326/5‑7 (N-DE/DK)
VCW 266/5‑7 (N-DE)
DE
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone]‑0 Fax [phone]‑2810
[email protected] www.vaillant.de

Contents
2Operating instructions ecoTEC exclusive 0020189874_03
Contents
1 Safety .................................................................... 3
1.1 Action-related warnings ......................................... 3
1.2 Intended use .......................................................... 3
1.3 General safety information .................................... 3
2 Notes on the documentation .............................. 5
2.1 Observing other applicable documents ................. 5
2.2 Storing documents................................................. 5
2.3 Applicability of the instructions .............................. 5
3 Product description............................................. 5
3.1 Product design....................................................... 5
3.2 Control elements.................................................... 5
3.3 Operator control panel........................................... 5
3.4 Displayed symbols................................................. 6
3.5 Information on the identification plate.................... 6
3.6 Serial number ........................................................ 6
3.7 CE label ................................................................. 6
3.8 DVGW mark........................................................... 6
4 Operation.............................................................. 7
4.1 Operating concept ................................................. 7
4.2 Basic display.......................................................... 7
4.3 Menu display.......................................................... 7
4.4 Operating levels..................................................... 7
4.5 Mobile operation .................................................... 8
4.6 Cabinet-type casing............................................... 9
4.7 Opening the isolator devices ................................. 9
4.8 Starting up the product .......................................... 9
4.9 Switching on the product ....................................... 9
4.10 Setting the language.............................................. 9
4.11 Setting the hot water temperature ......................... 9
4.12 Switching Comfort mode on and off ...................... 9
4.13 Setting the heating flow temperature..................... 9
4.14 Switching Green iQ mode on and off .................. 10
4.15 Guaranteeing the correct filling pressure of the
heating installation............................................... 10
4.16 Switching off the product's functions ................... 10
4.17 Protecting the heating installation against
frost...................................................................... 11
5 Detecting and rectifying faults ......................... 11
6 Calling up (Live monitor) status codes ........... 11
7 Care and maintenance ...................................... 11
7.1 Maintenance ........................................................ 11
7.2 Caring for the product.......................................... 11
7.3 Reading maintenance messages ........................ 11
7.4 Checking the condensate drain pipework and
tundish ................................................................. 11
8 Decommissioning.............................................. 12
8.1 Temporarily decommissioning the product.......... 12
8.2 Permanently decommissioning the product......... 12
9 Recycling and disposal..................................... 12
10 Guarantee and customer service..................... 12
10.1 Guarantee............................................................ 12
10.2 Customer service................................................. 12
Appendix ............................................................................ 13
A Operator level –overview ................................. 13
B Troubleshooting ................................................ 13
C Status codes –Overview .................................. 14

Safety 1
0020189874_03 ecoTEC exclusive Operating instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is intended as a heat generator
for closed heating installations and for hot
water generation.
Intended use includes the following:
–observance of the operating instructions
included for the product and any other
system components
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
This product can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabil-
ities or lack of experience and knowledge if
they have been given supervision or instruc-
tion concerning use of the product in a safe
way and understand the hazards involved.
Children must not play with the product.
Cleaning and user maintenance work must
not be carried out by children unless they are
supervised.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.3 General safety information
1.3.1 Installation by competent persons
only
The installation, inspection, maintenance
and repair of the product, as well as the gas
ratio settings, must only be carried out by a
competent person.
1.3.2 Danger caused by improper
operation
Improper operation may present a danger to
you and others, and cause material damage.
▶Carefully read the enclosed instructions
and all other applicable documents, par-
ticularly the "Safety" section and the warn-
ings.
▶Only carry out the activities for which in-
structions are provided in these operating
instructions.
1.3.3 Risk of death from escaping gas
What to do if you smell gas in the building:
▶Avoid rooms that smell of gas.
▶If possible, open doors and windows fully
and ensure adequate ventilation.
▶Do not use naked flames (e.g. lighters,
matches).
▶Do not smoke.
▶Do not use any electrical switches, mains
plugs, doorbells, telephones or other com-
munication systems in the building.
▶Close the emergency control valve or the
main isolator.
▶If possible, close the gas isolator cock on
the product.
▶Warn other occupants in the building by
yelling or banging on doors or walls.
▶Leave the building immediately and ensure
that others do not enter the building.
▶Alert the police and fire brigade as soon as
you are outside the building.

1 Safety
4Operating instructions ecoTEC exclusive 0020189874_03
▶Use a telephone outside the building to
inform the emergency service department
of the gas supply company.
1.3.4 Risk of death due to blocked or
leaking flue pipework
What to do if you smell flue gas in the prop-
erty:
▶Open all accessible doors and windows
fully to provide ventilation.
▶Switch off the product.
▶Inform a competent person.
1.3.5 Risk of death due to explosive and
flammable materials
▶Do not use the product in storage rooms
that contain explosive or flammable sub-
stances (such as petrol, paper or paint).
1.3.6 Risk of death due to changes to the
product or the product environment
▶Never remove, bridge or block the safety
devices.
▶Do not tamper with any of the safety
devices.
▶Do not damage or remove any seals on
components.
▶Do not make any changes:
–The product itself
–to the gas, air, water and electricity sup-
plies
–to the entire flue gas installation
–to the entire condensate drain system
–to the expansion relief valve
–to the drain pipework
–to constructional conditions that may
affect the operational reliability of the
product
1.3.7 Risk of poisoning caused by
insufficient combustion air supply
Conditions: Open-flued operation
▶Ensure that there is a sufficient combus-
tion air supply.
1.3.8 Risk of corrosion damage due to
unsuitable combustion and room air
Sprays, solvents, chlorinated cleaning
agents, paint, adhesives, ammonia com-
pounds, dust or similar substances may lead
to corrosion on the product and in the air/flue
pipe.
▶Ensure that the supply of combustion air is
always free of fluorine, chlorine, sulphur,
dust, etc.
▶Ensure that no chemical substances are
stored at the installation site.
1.3.9 Risk of material damage caused by
frost
▶Ensure that the heating installation always
remains in operation during freezing con-
ditions and that all rooms are sufficiently
heated.
▶If you cannot ensure the operation, have a
competent person drain the heating install-
ation.
1.3.10 Risk of injury and material damage
due to maintenance and repairs
carried out incorrectly or not
carried out at all
▶Never attempt to carry out maintenance
work or repairs on your product yourself.
▶Faults and damage should be immediately
rectified by a competent person.
▶Adhere to the maintenance intervals spe-
cified.

Notes on the documentation 2
0020189874_03 ecoTEC exclusive Operating instructions 5
2 Notes on the documentation
2.1 Observing other applicable documents
▶You must observe all operating instructions enclosed with
the system components.
2.2 Storing documents
▶Keep this manual and all other applicable documents
safe for future use.
2.3 Applicability of the instructions
These instructions apply only to:
Product article number
VC 156/5-7 (N-DE) ecoTEC exclusive 0010014917,
0010024212
VC 216/5-7 (N-DE) ecoTEC exclusive 0010014919,
0010024213
VC 246/5-7 (N-DE) ecoTEC exclusive 0010022159,
0010024216
VC 276/5-7 (N-DE) ecoTEC exclusive 0010014922,
0010024214
VC 326/5-7 (N-DE/DK) ecoTEC exclusive 0010014924,
0010024215
VCW 266/5-7 (N-DE) ecoTEC exclusive 0010017094,
0010024217
3 Product description
3.1 Product design
1
2
3
1 Control elements
2 Plate with serial number
on the rear
3 Front flap
3.2 Control elements
50
5
4 3 2 1
1 On/off button
2 Built-in controller (ac-
cessory)
3Reset button
4 Operating buttons
5 Display
3.3 Operator control panel
50
1
8
7
6
5
2
3
4
1 Current heating flow
temperature, filling
pressure of the heating
installation, operating
mode, fault code or
additional information
2 Current assignment of
the right-hand selection
button
3 Left- and right-hand
selection buttons
4and button
5 Maximum output op-
eration (for chimney
sweeps only)
6 Access to the menu for
additional information
7 Current assignment of
the left-hand selection
button
8 Active operating status
The display lights up
–if you switch on the product or

3 Product description
6Operating instructions ecoTEC exclusive 0020189874_03
–if you press a button while the product is switched on.
At first, pressing this button does not trigger any other
function.
The light goes out after one minute if you do not press any
button.
3.4 Displayed symbols
Symbol Meaning Explanation
Burner operating cor-
rectly
Burner on
Current burner modula-
tion rate
bar
Current filling pressure of
the heating system
The dashed lines show
the permitted range.
–Permanently on:
Filling pressure in
the permitted range.
–Flashing: Filling
pressure outside
the permitted range.
Hot water generation
active
–Permanently on:
Draw-off mode be-
fore burner is on
–Flashing: Burner on
in draw-off mode
Heating mode active –Permanently on:
Heating mode heat
requirement
–Flashing: Burner on
in heating mode
Green iQ mode active –Permanently on:
Energy-saving mode
active
Maintenance required Information on mainten-
ance message in the
"Live Monitor".
Summer mode active
Heating mode is
switched off
Burner anti-cycling time
is active
To avoid the need for
frequent switching on
and off (increases the
product's working life).
F. X X
Fault in the product Appears instead of the
basic display, may be
an explanatory plain text
display.
3.5 Information on the identification plate
The identification plate is mounted on the underside of the
product in the factory.
Information on the
identification plate
Meaning
Read the instructions.
VC(W) ... Type designation
..6/5-7 Calorific value power/product generation
equipment
ecoTEC exclusive Product designation
2N, G20 –G25
20 mbar (2 kPa)
Gas group and gas connection pressure
as set at the factory
ww/yyyy Date of manufacture: Week/year
Information on the
identification plate
Meaning
Cat. Approved unit categories
Types Approved gas-fired units
PMS Permissible total overpressure
Tmax. Max. flow temperature
ED 92/42 Current efficiency directive fulfilled with
4* rating
V Hz Mains voltage and mains frequency
W Max. electrical power consumption
IP Level of protection
Heating mode
Hot water generation
P Nominal heat output range
Q Heat input range
Bar code with serial number,
7th to 16th digit = product article number
3.6 Serial number
The serial number is located on a plate behind the front flap.
The plate is in a plastic fish plate. You can also display the
serial number in the display.
3.7 CE label
The CE label shows that the products comply with the basic
requirements of the applicable directives as stated on the
identification plate.
The declaration of conformity can be viewed at the manufac-
turer's site.
3.8 DVGW mark
The DVGW mark documents that the products comply with
all of the requirements of the DVGW VP 112 (test basis from
the German Association for Gas and Water Industry Asso-
ciation for granting the DVGW quality mark) in accordance
with the identification plate.

Operation 4
0020189874_03 ecoTEC exclusive Operating instructions 7
4 Operation
4.1 Operating concept
Operator
control
element
Function
–Setting the hot water temperature
–Cancelling the activation of an operating
mode
–Cancelling a change to a set value
–Going one selection level higher
–Setting the heating flow temperature
–Reading the system pressure
–Activating the comfort mode
–Activating the operating mode
–Confirm setting
–Going one selection level lower
+ at
the same
time
–Calling up the menu
or –Reducing or increasing the set value
–Scrolling through menu entries
The current function of the and buttons is shown in
the display.
Adjustable values are always displayed as flashing.
You must always confirm a change to a value. Only then is
the new setting saved. You can press to cancel a proced-
ure.
4.2 Basic display
50
The basic display shows the current condition of the product.
If you press a selection button, the activated function is dis-
played in the display.
The functions that are available depend on whether a con-
troller is connected to the product.
You can switch back to the basic display by:
–Pressing to exit the selection levels
–Not pressing any button for longer than 15 minutes.
If there is an error message present, the basic displays
switches to the error message.
4.3 Menu display
Xxxx
Xxxxxxxxxxx
Xxxx Xxxxxxx
Xxxxxxxxxx
xxxxxx Xxxxxxx
1
4
3
2
1 Scroll bar
2 Current assignment of
the and buttons.
3 Selection level list
entries
4 Name of the selection
level
You can find an overview of the menu structure in the ap-
pendix.
Operator level –overview (→Page 13)
4.4 Operating levels
The product has two operating levels.
The operating level for the operator shows information and
offers set-up options that do not require any special prior
knowledge.
The operating level for the competent person is protected by
a code.
Operator level –overview (→Page 13)

4 Operation
8Operating instructions ecoTEC exclusive 0020189874_03
4.5 Mobile operation
Conditions: Heating installation with VRC 700 control, product with Inter-
net gateway
1
2
3
4
5
1 eBUS cable
2 Network cable
3 Wireless LAN connec-
tion
4 Ethernet- or Wire-
less LAN-compatible
DSL- (Digital Subscriber
Line) or cable router
5 Vaillant server
If the product is equipped with an Internet gateway, there is
a product identification sticker in the form of a Data Matrix
code on the back of the front flap.
The Internet gateway is used for connection to a broadband
Internet connection as a prerequisite for mobile operation via
a smartphone or tablet. The Internet gateway always estab-
lishes the connection towards the Vaillant server. External
access to the Internet gateway is not possible. Mobile use of
functions of the connected controller is possible via the Inter-
net gateway.
During installation, the competent person either established
the Internet connection via the local network using network
cables or set it up via wireless LAN (WLAN).
Conditions: Product identification sticker present
▶Download the App for mobile operation from Google
play™ or the App Store™.
Note
Search term Vaillant
▶Proceed as described below.
Conditions: Connection to the local network via network cables
▶On the operator control panel for the heat generator, nav-
igate to the comDIALOG menu item (relates to the integ-
rated Internet gateway) and check whether the status of
the Internet gateway is Online.
–Menu →Information →comDIALOG
▽If the status is not Online, adjust your router configur-
ation if required and repeat the check.
◁Status is Online.
▶Launch the app and follow the instructions contained in it.
Conditions: Connection to the local network via WLAN
▶Launch the app and follow the instructions contained in it.
▶Switch the heat generator off and on again.
Note
After switching on the product, the WLAN
USB stick at the Internet gateway is initialised
and switched to Ad-hoc-Pairing mode for 10
minutes.
▶Firstly, connect to the Internet gateway for the heat gen-
erator via WLAN Ad-hoc-Pairing and then connect the
Internet gateway to the local network infrastructure.
Note
If you cannot establish an Ad-Hoc-Pairing with
the Internet gateway within 60 seconds, repeat
the procedure after switching the heat gener-
ator on and off again.
▶If you change the password for WLAN access to the local
network, repeat this procedure, too.
▶On the operator control panel for the heat generator, nav-
igate to the comDIALOG menu item and check whether
the status of the Internet gateway is Online.
–Menu →Information →comDIALOG
▽If the status is not Online, adjust your router configur-
ation if required and repeat the check.
◁Status is Online.
▶Follow the further instructions in the App.
Conditions: Product identification sticker not present
Mobile operation is only possible via an external Internet
gateway, which must be purchased separately as an access-
ory.

Operation 4
0020189874_03 ecoTEC exclusive Operating instructions 9
4.6 Cabinet-type casing
Enclosing the product in cabinet-type casing requires compli-
ance with the applicable design instructions.
If you require cabinet-type casing for your product, consult
a heating specialist company. Never, under any circum-
stances, enclose the product yourself.
4.7 Opening the isolator devices
1. Ask the competent person who installed the product to
explain to you where these isolator devices are located
and how to handle them.
2. Open the gas isolator cock fully.
3. Open the service valves in the heating installation's flow
and return.
Conditions: Product with integrated hot water generation
▶Open the cold water stop valve.
4.8 Starting up the product
▶Only start up the product once the casing has been com-
pletely closed.
4.9 Switching on the product
50
2
1
▶Press the on/off button (1).
◁The "Basic display" (→Page 7) (2) appears on the
display.
4.10 Setting the language
1. Press and hold and at the same time.
2. Also briefly press .
3. Press and hold and until the display shows the
language setting.
4. Select the required language by pressing or .
5. Confirm by pressing .
6. Once you have set the correct language, press
again to confirm this.
4.11 Setting the hot water temperature
Conditions: Water hardness: > 3.57 mol/m³
▶Have a competent person take appropriate measures to
protect against Legionella.
▶Set the hot water temperature to a maximum of 50 °C.
1. Press ( ).
◁The set hot water temperature flashes in the display.
Conditions: No controller connected
▶Change the hot water temperature by pressing or
.
▶Confirm by pressing .
Conditions: Controller connected
▶Use to set the maximum possible hot water temper-
ature on the product.
▶Confirm by pressing .
▶Set the required hot water temperature on the controller
(→Controller operating instructions).
4.12 Switching Comfort mode on and off
Note
Comfort mode immediately supplies hot water at
the required temperature, without you having to
wait for the water to heat up.
1. Press ( ).
2. Press ( ).
◁Comfort on or Comfort off are shown flashing in
the display.
3. Activate or deactivate Comfort mode by pressing or
respectively.
4. Press to confirm this change.
◁When you have activated Comfort mode, the " "
symbol appears on the basic display. When you
have deactivated Comfort mode, the " " symbol
goes out on the basic display.
4.13 Setting the heating flow temperature
1. Press ( ).
◁The target value of the heating flow temperature
appears on the display.
Note
The competent person may have adjusted
the maximum possible temperature.
Conditions: No controller connected
▶Use or to set the required heating flow temperat-
ure.
▶Confirm by pressing .

4 Operation
10 Operating instructions ecoTEC exclusive 0020189874_03
Conditions: Controller connected
▶Set the maximum possible heating flow temperature on
the product.
▶Confirm by pressing .
▶Set the required heating flow temperature on the control-
ler (→Controller operating instructions).
4.14 Switching Green iQ mode on and off
Note
Green iQ mode is an energy-saving operating
mode. If this mode is activated, the product oper-
ates in the heating and cylinder charging mode in
such a way that the maximum benefits associated
with condensing technology are achieved.
1. Press and at the same time.
◁The menu is called up.
2. Navigate to the Green iQ menu item and press .
–Menu →Basic settings →Green iQ
3. Press or to activate or deactivate Green iQ
mode respectively.
◁Mode on or Mode off will flash on the display.
4. Confirm by pressing .
◁If you have activated Green iQ mode, the symbol
will appear on the basic display. If you have deactiv-
ated Green iQ mode, the symbol will disappear
from the basic display.
4.15 Guaranteeing the correct filling pressure of
the heating installation
4.15.1 Checking the filling pressure of the heating
installation
Note
To ensure that the heating installation operates
smoothly, the filling pressure when the heating
installation is cold must be between 0.1 MPa and
0.2 MPa (1.0 bar and 2.0 bar) or lie between the
two dashed lines in the bar graph display.
If the heating installation extends over several
storeys, a higher filling pressure may be required
for the heating installation. Ask a competent per-
son for details.
If the filling pressure in the heating installation
falls below 0.05 MPa (0.5 bar), then the product
switches off. The display alternates between the
fault message F.22 and the current filling pres-
sure.
In addition, the symbol appears after approx.
one minute.
1. Press twice.
◁The current filling pressure (1) is shown in the
display, along with the permissible filling pressure
range.
2. Check the filling pressure in the display.
1 / 2
System pressure: 0.1 … 0.2 MPa (1.0 … 2.0 bar)
The filling pressure is in the intended pressure range.
2 / 2
Filling pressure: < 0.08 MPa (< 0.80 bar)
▶Fill the heating installation. (→Page 10)
◁If you have topped up the installation with suf-
ficient heating water, the display automatically
disappears after 20 seconds.
4.15.2 Filling the heating installation
Caution.
Risk of material damage due to heating
water that is extremely calciferous or cor-
rosive or contaminated by chemicals.
Unsuitable tap water damages the seals
and diaphragms, blocks components in the
product and heating installation through
which the water flows and causes noise.
▶Only fill the heating installation with suit-
able heating water.
1. Ask a competent person where the filling cock is loc-
ated.
2. Connect the filling tap to a heating water supply in the
way you were told by the competent person.
3. Open all radiator valves (thermostatic radiator valves) of
the heating installation.
4. Open the heating water supply.
5. Turn the filling cock on slowly and allow water to flow in
until the required filling pressure has been reached.
6. Close the heating water supply.
7. Purge all radiators.
8. Check the filling pressure in the display.
9. Top up with more water if necessary.
10. Close the filling cock.
11. Go back to the Basic display (→Page 7).
4.16 Switching off the product's functions
4.16.1 Switching off hot water generation
Applicability: Product with hot water generation through external domestic
hot water cylinder
1. To switch off cylinder charging without switching off
heating mode, press ( ).
◁The set hot water temperature flashes in the display.
2. Use the button to set the hot water temperature to
Cylinder charging off.
3. Confirm by pressing .
◁Cylinder charging is switched off.
◁Only the frost protection function for the cylinder
remains active.

Detecting and rectifying faults 5
0020189874_03 ecoTEC exclusive Operating instructions 11
4.16.2 Switching off heating mode (Summer
mode)
1. To switch off heating mode without switching off hot
water generation, press ( ).
◁The value of the heating flow temperature appears
in the display.
2. Use the button to set the heating flow temperature to
Heating off.
3. Confirm by pressing .
◁Heating mode is switched off
◁The symbol appears in the display.
4.17 Protecting the heating installation against
frost
4.17.1 Frost protection function
Caution.
Risk of material damage due to frost.
The frost protection function cannot guaran-
tee flow through the entire heating installa-
tion, which means that parts of the heating
installation may freeze and therefore become
damaged.
▶During a period of frost, ensure that the
heating installation remains in operation
and that all rooms are sufficiently heated,
even when you are away.
Note
To keep the frost protection devices active, you
should switch your product on and off using the
controller, if one is provided.
If the heating flow temperature falls below 5 °C when the
on/off button is on, the product comes into operation and
heats the circulating water to approx. 30 °C on both the heat-
ing side and the hot water side (if available).
4.17.2 Draining the heating installation
Another way to protect the heating installation and the
product from frost for very long switch-off times is to drain
them completely.
▶Consult a competent person about this.
5 Detecting and rectifying faults
▶If faults occur, proceed in accordance with the table in
the appendix.
Troubleshooting (→Page 13)
▶If you are unable to eliminate the faults using the spe-
cified measures, if fault messages (F.xx) are displayed,
or if the product does not function correctly, contact a
competent person.
6 Calling up (Live monitor) status
codes
1. Press and at the same time.
◁The menu is called up.
2. Navigate to Menu →Live monitor and confirm by
pressing .
Status codes –Overview (→Page 14)
7 Care and maintenance
7.1 Maintenance
An annual inspection and biennial maintenance of the
product carried out by a competent person is a prerequisite
for ensuring that the product is permanently ready and
safe for operation, reliable, and has a long service life. The
inspection may require maintenance to be carried out earlier,
depending on the results.
7.2 Caring for the product
▶Clean the casing with a damp cloth and a little solvent-
free soap.
▶Do not use sprays, scouring agents, detergents, solvents
or cleaning agents that contain chlorine.
7.3 Reading maintenance messages
If the symbol is shown in the display, the product requires
maintenance work. The product is not in fault mode; it contin-
ues to operate.
▶Consult a competent person.
▶If the water pressure is flashing at the same time, simply
add more heating water.
7.4 Checking the condensate drain pipework
and tundish
The condensate drain pipework and tundish must always be
penetrable.
▶Regularly check the condensate drain pipework and tun-
dish for faults and, particularly, for blockages.
You must not be able to see or feel any obstructions in the
condensate drain pipework and tundish.
▶If you notice a fault, have it rectified by a competent per-
son.

8 Decommissioning
12 Operating instructions ecoTEC exclusive 0020189874_03
8 Decommissioning
8.1 Temporarily decommissioning the product
Caution.
Risk of material damage due to frost.
The frost protection and monitoring devices
are only active while the product is connected
to the power mains and switched on via the
on/off button, and when the gas isolator cock
is open.
▶Temporarily decommission the product
only if no frost is expected.
1. Switch off the product using the on/off button.
◁The display goes out.
2. When decommissioning the product for an extended
period (e.g. holiday), also close the gas isolator cock.
8.2 Permanently decommissioning the product
▶Have a competent person permanently decommission
the product.
9 Recycling and disposal
▶The competent person who installed your product is re-
sponsible for the disposal of the packaging.
If the product is labelled with this mark:
▶In this case, do not dispose of the product with the
household waste.
▶Instead, hand in the product to a collection centre for
waste electrical or electronic equipment.
If the product contains batteries that are labelled with
this mark, these batteries may contain substances that are
hazardous to human health and the environment.
▶In this case, dispose of the batteries at a collection point
for batteries.
10 Guarantee and customer service
10.1 Guarantee
Herstellergarantie gewähren wir nur bei Installation durch
einen anerkannten Fachhandwerksbetrieb.
Dem Eigentümer des Geräts räumen wir diese Hersteller-
garantie entsprechend den Vaillant Garantiebedingungen
ein. Garantiearbeiten werden grundsätzlich nur von unserem
Kundendienst ausgeführt. Wir können Ihnen daher etwaige
Kosten, die Ihnen bei der Durchführung von Arbeiten an
dem Gerät während der Garantiezeit entstehen, nur dann
erstatten, falls wir Ihnen einen entsprechenden Auftrag erteilt
haben und es sich um einen Garantiefall handelt.
10.2 Customer service
Auftragsannahme Vaillant Kundendienst: 021 91 5767901

Appendix
0020189874_03 ecoTEC exclusive Operating instructions 13
Appendix
A Operator level –overview
Setting level Values Unit Increment, select Default
setting
Min. Max.
Water pressure →
Water pressure Current value bar
Live monitor →
Status Current value
Information →
Contact details Phone number
Serial number Permanent value
Display contrast Current value 1 25
15 40
comDIALOG Current value No function
Basic settings →
Language Current language Languages available for selection Country-
specific
Green iQ Current value On, Off On
Display contrast Current value 1 25
15 40
Resets →
Reset anti-cycl. time Current value min
B Troubleshooting
Fault Cause Measure
Product does not start
up:
–No hot water
–Heating remains cold
The gas isolator cock installed on-site and/or the gas
isolator cock on the product is closed.
Open both gas isolator cocks.
The cold water stop valve is closed. Open the cold water stop valve.
The power supply in the building is disconnected. Check the fuse in the building. The product
switches on automatically when the power is
restored.
The product is switched off. Switch on the product (→"Switching on the
product" section).
The heating flow temperature is set too low or to the
Heating off position, and/or the hot water temperature
is set too low.
Set the heating flow temperature and hot water
temperature (→"Setting the heating flow temper-
ature" section/→"Setting the hot water temperat-
ure" section).
The system pressure is insufficient.
Low water pressure in the heating installation (fault mes-
sage: F.22).
Fill the heating installation (→"Filling the heating
installation" section).
There is air in the heating installation. Have your competent person purge the heating
installation.
After three unsuccessful attempts to ignite the flame, the
product switches to fault mode (fault message: F.28).
Press the reset button for one second. The
product makes another attempt to ignite the
flame.
If you have been unable to eliminate the ignition
fault after three reset attempts, consult a com-
petent person.

Appendix
14 Operating instructions ecoTEC exclusive 0020189874_03
Fault Cause Measure
Product does not start
up:
–No hot water
–Heating remains cold
There is a fault in the flue gas route (fault message:
F.36/F.37):
–The symbols XXXXX are shown in the display.
–The red LED is lit continuously.
Have your competent person rectify the fault.
Hot water generation
functioning correctly;
heating does not start
up.
The external controller is not set correctly. Set the external controller correctly (→Controller
operating instructions).
C Status codes –Overview
Status code Parameter Meaning
Heating mode
S.00 Heating: No heat demand Heating: No heat demand
S.01 Heating mode: Fan start-up Heating mode: Fan start-up
S.02 Heating mode: Pump pre-run Heating mode: Pump pre-run
S.03 Heating mode: Ignition Heating mode: Ignition
S.04 Heating mode: Burner on Heating mode: Burner on
S.05 Heating mode: Pump/fan overrun Heating mode: Pump/fan overrun
S.06 Heating mode: Fan overrun Heating mode: Fan overrun
S.07 Heating mode: Pump overrun Heating mode: Pump overrun
S.08 Heating mode: Anti-cycling time Heating mode: Remaining anti-cycling time
S.09 Heating mode: Measuring program Heating mode: Measuring program
DHW mode
S.10 DHW demand Hot water requirement via flow sensor
S.11 DHW mode: Fan start-up DHW mode: Fan start-up
S.13 DHW mode: Ignition DHW mode: Ignition
S.14 DHW mode: Burner on DHW mode: Burner on
S.15 DHW mode: Pump/fan overrun DHW mode: Pump/fan overrun
S.16 DHW mode: Fan overrun DHW mode: Fan overrun
S.17 DHW mode: Pump overrun DHW mode: Pump overrun
S.19 DHW mode: Measuring program DHW mode: Measuring program
Comfort mode, warm start or hot water handling mode with actoSTOR
S.20 DHW demand DHW demand
S.21 DHW mode: Fan start-up DHW mode: Fan start-up
S.22 DHW mode: Pump pre-run DHW mode: Pump pre-run
S.23 DHW mode: Ignition DHW mode: Ignition
S.24 DHW mode: Burner on DHW mode: Burner on
S.25 DHW mode: Pump/fan overrun DHW mode: Pump/fan overrun
S.26 DHW mode: Fan overrun DHW mode: Fan overrun
S.27 DHW mode: Pump overrun DHW mode: Pump overrun
S.28 DHW anti-cycling time Hot water burner anti-cycling time
S.29 DHW mode: Measuring program DHW mode: Measuring program
Others
S.30 No heat demand: Controller Room thermostat (RT) is blocking heating mode
S.31 No heat demand: Summer mode Summer mode active or no heat requirement from eBUS
controller
S.32 Waiting time deviation: Fan speed Waiting period because of fan speed deviation
S.33 Waiting time: Air monitor Waiting period: Air pressure sensor/switch reports that
the pressure signal is too low
S.34 Heating mode: Frost protection Frost protection mode active

Appendix
0020189874_03 ecoTEC exclusive Operating instructions 15
Status code Parameter Meaning
S.36 Target value for ext. controller lower than 20 °C Reference setting for continuous controller 7-8-9 or
eBUS controller is < 20°C and blocks the heating mode
S.37 Waiting time: Deviation in fan speed Waiting time: Fan failure in operation
S.39 Contact thermostat triggered "Burner off contact" has responded (e.g. contact thermo-
stat or condensate pump)
S.40 Comfort protection active Comfort protection mode is active: Product running with
limited heating comfort
S.41 Water pressure too high Water pressure > 2.8 bar
S.42 Flue non-return flap closed
Flue non-return flap response blocks burner operation
(only in conjunction with accessory VR40) or condensate
pump defective; heat requirement is blocked
S.46 Comfort protection: Minimum load, loss of flame Comfort protection mode, flame loss at minimum load
S.53 Waiting time: Water shortage
Product is within the waiting period of the modulation
block/operation block function as a result of low water
pressure (flow/return spread too large)
S.54 Waiting time: Water shortage
Product is within the waiting period of the operation
blocking function as a result of low water pressure
(temperature gradient)
S.55 Waiting time: CO sensor Waiting time: CO sensor
S.56 Waiting time: CO limit value exceedance Waiting time: CO limit value exceedance
S.57 Waiting time: Measuring program Calibration unsuccessful. Waiting period, comfort safety
mode
S.58 Burner modulation limitation Modulation limitation due to noise/wind
S.59 Waiting time: Water circulation vol. Minimum circulation water volume
S.76 Service message: Check water pressure System pressure too low. Top up water.
S.85 Service message: Check water circulation volume Service message: Check water circulation volume
S.86 Service message: Check vortex sensor Service message: Check vortex sensor
S.87 Service message: Check differential pressure sensor Service message: Check differential pressure sensor
S.88 Purging programme is running Purging programme is running
S.92 Water circulation volume self-test Water circulation volume self-test
S.93 Flue gas measurement not possible Flue gas measurement not possible because not all
measuring programs have yet run
S.96 Return temperature sensor self-test Return sensor test running, heating demands are
blocked.
S.97 Water pressure sensor self-test Water pressure sensor test running, heating demands
are blocked.
S.98 Flow/return temperature sensor self-test Flow/return sensor test running, heating demands are
blocked.
S.99 Vaillant self-test Self-test
S.105 Unit not purged Unit not purged (D.130 = 0: No bypass valve)

0020189874_03 06.11.2017
Supplier
Vaillant Deutschland GmbH & Co.KG
Berghauser Str. 40 D-42859 Remscheid
Telefon [phone]‑0 Telefax 021 91 18‑2810
Auftragsannahme Vaillant Kundendienst 021 91 5767901
[email protected] www.vaillant.de
© These instructions, or parts thereof, are protected by copyright and may be reproduced or distributed only with
the manufacturer's written consent.
We reserve the right to make technical changes.
0020189874_03