Viessmann VITODENS User manual

Operating instructions
for the system user
VIESMANN
Heating system with Vitotronic 100 control unit, type HC1B, for operation with a
constant boiler water temperature
VITODENS
VITOPEND
5592683 GB 10/2020 Please keep safe.

2
Please follow these safety instruc-
tions closely to prevent accidents
and material losses.
Safety instructions explained
Danger
This symbol warns against the risk
of injury.
!Please note
This symbol warns against the risk
of material losses and environmen-
tal pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These operating instructions are
designed for heating system users.
This appliance can also be operated by
children 8 years and older, as well as by
individuals with reduced physical, sen-
sory or mental faculties or those lacking
in experience and knowledge, provided
such individuals are being supervised or
have been instructed in the safe use of
this appliance and any risks arising from
it.
!Please note
Supervise children in the proximity
of the appliance.
■Never permit children to play with
the appliance.
■Cleaning and maintenance must
not be carried out by unsuper-
vised children.
Safety instructions for working on the system
Appliance connection
■The appliance may be connected and
commissioned only by authorised con-
tractors.
■Only operate the appliance with suita-
ble fuels.
■Observe the specified electrical con-
nection requirements.
■Modifications to the existing installation
may be carried out only by authorised
contractors.
Danger
Incorrectly executed work on the
heating system can lead to life
threatening accidents.
■Work on gas installations may
only be carried out by a registered
gas fitter.
■Work on electrical equipment may
only be carried out by a qualified
electrician.
Safety instructions
For your safety
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3
Work on the appliance
■All settings and work on the appliance
must be carried out as specified in
these operating instructions.
Further work on the appliance may be
carried out only by authorised contrac-
tors.
■Never open the appliance.
■Never remove casings.
■Never change or remove attachments
or fitted accessories.
■Never open or tighten pipe connec-
tions.
Danger
Hot surfaces can cause burns.
■Never open the appliance.
■Never touch the hot surfaces of
uninsulated pipes, fittings or flue
pipes.
Auxiliary components, spare and
wearing parts
!Please note
Components not tested with the
heating system may damage the
system or affect its function.
Have all installation or replacement
work carried out exclusively by
qualified contractors.
Safety instructions for operating the system
Damage to the appliance
Danger
Damaged equipment poses a
safety hazard.
Check the appliance for external
damage. Never start up a damaged
appliance.
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■Do not smoke! Prevent naked
flames and sparks. Never switch
lights or electrical appliances on
or off.
■Close the gas shut-off valve.
■Open windows and doors.
■Evacuate any people from the
danger zone.
■Notify your gas and power supply
utility and your local heating con-
tractor from outside the building.
■Have the power supply to the
building shut off from a safe place
(outside the building).
Safety instructions
For your safety (cont.)
5592683

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If you smell flue gas
Danger
Flue gas can lead to life threatening
poisoning.
■Shut down the heating system.
■Ventilate the installation site.
■Close all doors in the living space.
If there is a fire
Danger
Fire presents a risk of burns and
explosion.
■Shut down the heating system.
■Close the shut-off valves in the
fuel supply lines.
■Use a tested fire extinguisher,
class ABC.
What to do if water escapes from the
appliance
Danger
If water escapes from the appliance
there is a risk of electric shock.
■Switch off the heating system at
the external isolator (e.g. fuse
box, domestic distribution board).
■Notify your heating contractor.
If the heating system develops a fault
Danger
Fault messages indicate faults in
the heating system. If faults are not
rectified, they can have life threat-
ening consequences.
Do not acknowledge fault mes-
sages several times in quick suc-
cession. Inform your heating con-
tractor so the cause can be ana-
lysed and the fault rectified.
Installation room requirements
Danger
Sealed vents result in a lack of
combustion air. This leads to incom-
plete combustion and the formation
of life threatening carbon monoxide.
Never cover or close existing vents.
Do not make any subsequent modi-
fications to the building characteris-
tics that could affect safe operation
(e.g. cable/pipework routing, clad-
ding or partitions).
Danger
Easily flammable liquids and mate-
rials (e.g. naphtha/petrol, solvents,
cleaning agents, paints or paper)
can cause deflagration and fire.
Never store or use such materials
in the boiler room or in direct prox-
imity to the heating system.
!Please note
Incorrect ambient conditions can
lead to heating system damage and
can put safe operation at risk.
■Ensure ambient temperatures are
above 0 °C and below 35 °C.
■Prevent air contamination by halo-
genated hydrocarbons (e.g. as
contained in paints, solvents or
cleaning fluids) and excessive
dust (e.g. through grinding/polish-
ing work).
■Avoid continuously high humidity
levels (e.g. through continuous
drying of washing).
Extractors
The operation of appliances that extract
air to the outside (cooker hoods, extrac-
tors, air conditioning units, etc.) can cre-
ate negative pressure. If the boiler is
operated at the same time, this can lead
to a reverse flow of flue gas.
Safety instructions
For your safety (cont.)
5592683

5
Danger
The simultaneous operation of the
boiler and appliances that extract
air to the outside can result in life
threatening poisoning due to a
reverse flow of flue gas.
Take suitable steps to ensure an
adequate supply of combustion air.
If necessary, contact your contrac-
tor.
Safety instructions
For your safety (cont.)
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6
1. Introductory information Symbols ................................................................................................. 8
Terminology ........................................................................................... 8
Intended use .......................................................................................... 8
Product information ................................................................................ 9
Commissioning ...................................................................................... 9
Your system is preset ............................................................................ 9
Energy saving tips ................................................................................. 10
Tips for greater comfort ......................................................................... 10
2. About the controls Operating principles ............................................................................... 11
■Programming unit ............................................................................... 11
■Room temperature controller for room temperature-dependent oper-
ation .................................................................................................... 11
How to use the controls ......................................................................... 11
■Home screen ...................................................................................... 11
■Keys .................................................................................................... 11
■Symbols .............................................................................................. 11
Calling up the menu for settings and checks ......................................... 12
Operating program ................................................................................. 12
■Operating programs for central heating, DHW, frost protection .......... 12
3. Central heating Settings for central heating .................................................................... 13
Setting the flow temperature .................................................................. 13
Setting the operating program for central heating ................................. 13
Switching off central heating .................................................................. 13
■You do not want to heat any rooms but do want to heat DHW. .......... 13
■You do not want to heat any rooms or DHW. ...................................... 14
4. DHW heating Settings for DHW heating ...................................................................... 15
Setting DHW temperature ...................................................................... 15
Setting the operating program for DHW heating .................................... 15
Switching off DHW heating .................................................................... 15
■You do not want to heat DHW, but you do want to heat the rooms. ... 15
■You do not want to heat any rooms or DHW. ...................................... 16
Activating the comfort function (if available) .......................................... 16
■Ending the comfort function ................................................................ 16
5. Further adjustments Setting the temperature unit (°C/°F) ...................................................... 17
Restoring factory settings ...................................................................... 17
6. Calling up Checking information and resetting values ............................................ 18
Checking service messages .................................................................. 19
■Calling up an acknowledged service message ................................... 19
Checking fault messages ....................................................................... 19
■Calling up an acknowledged fault message ....................................... 20
7. Multi boiler systems Special considerations for multi boiler systems ..................................... 21
8. Emissions test mode Activating emissions test mode ............................................................. 22
■Activating emissions test mode .......................................................... 22
■Stopping emissions test mode ............................................................ 22
9. Switching on and off Control unit controls ............................................................................... 23
Switching off the heating system ........................................................... 23
■Switching off heat generation with frost protection monitoring
(standby mode) ................................................................................... 23
■Switching off heat generation without frost protection monitoring ...... 23
Starting the heating system ................................................................... 24
10. What to do if... Rooms are too cold ................................................................................ 25
Index
Index
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Rooms are too hot ................................................................................. 25
There is no hot water ............................................................................. 26
The DHW is too hot ............................................................................... 26
"ã" flashes ............................................................................................ 26
"E" flashes ............................................................................................ 27
"ë" flashes ............................................................................................ 27
"- - EP - -" flashes .................................................................................. 27
11. Repair work Cleaning ................................................................................................. 28
Inspection and maintenance .................................................................. 28
■Boiler .................................................................................................. 28
■DHW cylinder (if installed) .................................................................. 28
■Safety valve (DHW cylinder) ............................................................... 28
■Potable water filter (if installed) .......................................................... 28
Damaged cables / lines ......................................................................... 29
12. Keyword index ................................................................................................................ 33
Index
Index (cont.)
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Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
Terminology
To provide you with a better understanding of the func-
tions of your control unit, some terminology is
explained. This information can be found in chapter
"Terminology" in the Appendix.
Intended use
The appliance is intended solely for installation and
operation in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions. It is only designed for heating up heating water
that is of potable water quality.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than heating the building or DHW shall be deemed
inappropriate.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Introductory information
Symbols
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Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended use (e.g. if the
flue gas and ventilation air paths are sealed).
Product information
The Vitotronic 100 control unit, type HC1B is a boiler
and heating circuit control unit for operation with a con-
stant boiler water temperature.
During operation with a constant boiler water tempera-
ture, the boiler provides heating water at a constant
temperature, independent of the outside temperature.
Central heating and DHW heating are provided with a
constant boiler water temperature. The flow tempera-
ture for the DHW cylinder corresponds to the set boiler
water temperature. In conjunction with separately con-
nected control units, the flow temperature for central
heating can be regulated to lower temperatures.
In constant operation, 1 heating circuit without mixer
can be operated with the control unit.
Note
In systems with several boilers (multi boiler systems),
each boiler is equipped with its own control unit. These
control units are regulated by a higher control unit. All
operating information can be found in the operating
instructions of the higher control unit.
Commissioning
The commissioning and matching of the appliance to
local conditions and building characteristics, as well as
instructing the user in the operation of the system,
must be carried out by your contractor.
As the user of new combustion equipment, you may be
obliged to notify your local flue gas inspector of the
installation [check local regulations]. Your local flue gas
inspector will also inform you [where appropriate]
about work that may have to be carried out on your
combustion equipment (such as regular checks, clean-
ing).
Your system is preset
The control unit is factory set to " " for central
heating and DHW heating.
Your heating system is therefore ready for operation:
Central heating
■The rooms are heated in accordance with the set-
tings on your control unit and room temperature con-
troller.
■Your heating contractor can make further settings for
you during commissioning.
You can change all settings individually at any time
to suit your requirements (see chapter "Central heat-
ing").
DHW heating
■DHW is heated to 50 °C.
■Your heating contractor can make further settings for
you during commissioning.
You can change all settings individually at any time
to suit your requirements (see chapter "DHW heat-
ing").
Frost protection
■Your heat generator and DHW cylinder (if installed)
are protected against frost.
Power failure
All settings are retained if there is a power failure.
Introductory information
Intended use (cont.)
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Saving energy when using central heating
■Do not overheat your rooms; you can save up to 6 %
on your heating bills for every degree you reduce
your room temperature.
Do not set your room temperature higher than 20 °C:
Operating instructions for room temperature
controller
■Heat your home to the reduced temperature at night
or during regular absences. To do so, adjust the time
program for central heating at your room tempera-
ture controller:
Operating instructions for room temperature
controller
■Do not set your flow temperature too high: See
page 13.
■To switch off functions that are not required (e.g.
central heating in summer), set the operating pro-
gram accordingly.
–In the summer, if you do not want to heat any
rooms but do need DHW, select the " " operating
program: See page 13.
–If you do not want to heat any rooms and do not
need DHW for a prolonged period of time, select
the " " operating program: See page 14.
Saving energy on DHW heating
■Do not set the DHW temperature too high: See
page 15.
■Activate the ECO function for DHW heating: See
page 16.
For additional energy saving functions, please contact
your contractor.
Tips for greater comfort
More comfort in your home
■Set your individual preferred temperature:
Operating instructions for room temperature
controller
■Set the flow temperature sufficiently high: See
page 13
■Set the time program for your heating circuits so that
your individual preferred temperature is automatically
reached as soon as you are present. To do so, adjust
the time program for central heating at your room
temperature controller:
Operating instructions for room temperature
controller
Sufficient DHW heating for your needs
■You want to have DHW available immediately. To do
this, activate the COMF comfort function for DHW
heating: See page 16.
Introductory information
Energy saving tips
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Programming unit
You can change any setting on your heating system
centrally at the programming unit of the control unit.
Note
The programming unit can be placed in a wall mount-
ing base. The wall mounting base is available as an
accessory. Ask your heating contractor for further infor-
mation.
Room temperature controller for room temperature-dependent operation
If a room temperature controller is installed in one of
your rooms, you can adjust some settings at the room
temperature controller.
Operating instructions, room temperature con-
troller
How to use the controls
Home screen
After switching on or activating the control unit the
home screen is shown.
Keys
4 8°C
s A
Fig. 1
To take one step back in the menu.
Navigation buttons
To scroll through the menu or adjust values
OK To confirm your selection or setting.
No function
Enables you to call up the menu for settings and
checks.
Symbols
These symbols are not always displayed, but appear
subject to the system version and the operating status.
Flashing displays indicate that modifications can be
made.
Menu
Central heating
DHW heating
Information
Emissions test mode
Additional settings
Operating program
Frost protection monitoring (standby mode)
DHW heating
Central heating and DHW heating
COMF Comfort mode for DHW heating
ECO Without comfort mode for DHW heating
About the controls
Operating principles
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Messages
Service message
ýThe service interval has expired.
Fault message
Burner fault message
Displays
Temperature
Frost protection monitoring
Central heating
Heating circuit pump running
Cylinder loading pump running.
In conjunction with a solar thermal system:
Solar circuit pump running.
Burner running
Standard factory setting
Calling up the menu for settings and checks
4 8°C
Fig. 2
Press . This takes you to the menu for settings and
checks.
Operating program
Operating programs for central heating, DHW, frost protection
Symbol Operating program Function
Central heating and DHW heating ■The rooms are heated in accordance with the
specifications for room temperature and time pro-
gram: See chapter "Central heating".
Note
In room temperature-dependent operation, a time
program for central heating can only be set at the
room temperature controller: See the operating
instructions for the room temperature controller.
■DHW is heated in accordance with the specified
DHW temperature: See chapter "DHW heating".
DHW heating ■DHW is heated in accordance with the specified
DHW temperature: See chapter "DHW heating".
■No central heating
■Frost protection is active.
Frost protection monitoring (standby
mode)
■No central heating
■No DHW heating
■Frost protection for the boiler and the DHW cylin-
der is active.
About the controls
How to use the controls (cont.)
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If you require central heating, check the following
points:
■Have you set the required room temperature?
Operating instructions for room temperature
controller
■Have you set the flow temperature high enough?
For settings, see the next chapter.
■Have you set the correct operating program?
For settings, see page 13.
And
Operating instructions for room temperature
controller
■Have you set the required time program?
Operating instructions for room temperature
controller
Setting the flow temperature
Set the flow temperature high enough that the required
room temperature can be achieved.
Factory setting: 74 °C
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. for boiler water temperature; " " flashes.
4. OK to confirm; the selected temperature flashes.
5. / for the required boiler water temperature.
6. OK to confirm; the new temperature value is
saved.
Setting the operating program for central heating
Activate the operating program for central heating.
Factory setting: " " for central heating and DHW
heating (winter mode)
This setting is only required if one of the following
operating programs is set:
DHW heating only
Standby mode
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm.
4. / until " " flashes.
5. OK to confirm; the rooms and DHW are heated.
For information on the operating programs, see
page 12.
Switching off central heating
Deactivate the operating program for central heating.
You do not want to heat any rooms but do want to heat DHW.
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm; " " flashes.
4. until " " flashes.
5. OK to confirm; central heating is disabled and
DHW is heated (summer mode).
Central heating
Settings for central heating
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You do not want to heat any rooms or DHW.
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm; " " flashes.
4. until " " flashes.
5. OK to confirm; central heating and DHW heating
are disabled, frost protection monitoring is acti-
vated (standby mode).
Central heating
Switching off central heating (cont.)
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If you want DHW heating, check the following points:
■Have you set the required DHW temperature?
For settings, see the next chapter.
■Have you set the correct operating program?
For settings, see page 15.
Setting DHW temperature
Set the target DHW temperature for the DHW cylinder.
Factory setting: 50 °C
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm; temperature flashes.
4. / for required DHW temperature.
5. OK to confirm; the new temperature value is
saved.
Setting the operating program for DHW heating
Activate the operating program for DHW heating.
Factory setting: " " for central heating and DHW
heating (winter mode)
This setting is only required if the operating program
is set:
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm; " " flashes.
4. / until " " flashes for DHW heating (summer
mode, no central heating).
Or
until " " flashes for central heating and
DHW heating (winter mode).
5. OK to confirm; the selected operating program is
activated.
For information on the operating programs, see
page 12.
Switching off DHW heating
Deactivate DHW heating.
You do not want to heat DHW, but you do want to heat the rooms.
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm; " " flashes.
4. until " " flashes.
5. OK to confirm; the rooms and DHW are heated
(winter mode).
6. for settings; " " flashes.
7. for " ".
8. OK to confirm; temperature flashes.
9. to 10 ºC.
10. OK to confirm; the new temperature value is
saved.
DHW heating
Settings for DHW heating
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You do not want to heat any rooms or DHW.
Press the following buttons:
1. for settings; " " flashes.
2. OK to confirm; " " flashes.
3. OK to confirm; " " flashes.
4. until " " flashes.
5. OK to confirm; DHW heating and central heating
are disabled, frost protection monitoring is acti-
vated (standby mode).
Activating the comfort function (if available)
With the comfort function you can preheat the water
volume in the plate heat exchanger to the selected
DHW temperature. This makes DHW available imme-
diately.
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm; COMF ECO flashes.
4. OK to confirm; ECO flashes.
5. for COMF.
6. OK to confirm; the comfort function is activated.
Ending the comfort function
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm; COMF ECO flashes.
4. OK to confirm; COMF flashes.
5. for ECO.
6. OK to confirm; the comfort function is terminated.
DHW heating
Switching off DHW heating (cont.)
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Factory setting: °C
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm; " " flashes.
4. / for required temperature unit (°C or °F).
5. OK to confirm; the new temperature unit is saved.
Restoring factory settings
You can simultaneously reset all changed values to
their factory settings.
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm; " " flashes.
4. OK to confirm; the factory settings are reinstated.
Factory settings:
■Operating program: " "
■Flow temperature: 74 °C
■DHW temperature: 50 °C
Further adjustments
Setting the temperature unit (°C/°F)
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Subject to the components connected and the settings
made, you can check current temperatures and oper-
ating conditions.
Press the following buttons:
1. for settings; " " flashes.
2. for " ".
3. OK to confirm.
4. / for the required information.
5. OK to confirm; if you want to reset the value to "0"
(see following table), " " flashes.
6. OK to confirm; the value is reset.
Example:
On the display, you can see "3" which shows the boiler
water temperature. The current boiler water tempera-
ture is 65 °C.
¸
3 6 5°C
Fig. 3
Note
Checking mode ends automatically after 30 minutes.
You can exit the menu at any time with .
Information appears in the following sequence:
Shown on display Meaning Notes
0 10 LON subscriber number –
1 15 ºC Outside temperature In conjunction with outside temperature sensor
2 95 ºC Flue gas temperature –
3 65 ºC Boiler water temperature –
4 45 ºC Temperature of heating water
buffer cylinder or low loss head-
er
In conjunction with heating water buffer cylinder or low
loss header
5 50 ºC DHW temperature In conjunction with DHW cylinder
51 50 ºC DHW temperature, top Only if 2 cylinder temperature sensors are connected.
52 50 ºC DHW temperature, bottom
5c 95 ºC Collector temperature In conjunction with Viessmann solar control module
5□ 45 ºC DHW temperature with solar op-
eration
In conjunction with solar thermal system
53 50 ºCTemperature sensor /In conjunction with Viessmann solar control module:
Only if a third temperature sensor is connected.
54 50 ºCTemperature sensor aÖ In conjunction with Viessmann solar control module:
Only if a fourth temperature sensor is connected.
6 70 ºC Collector temperature In conjunction with solar thermal system
2 6 3 5 7 2 h Burner hours run Number of hours run (approximate values only):
The hours run can be reset to "0" with "D".
1
0 3 0 5 2 9 Burner starts The number of burner starts can be reset to "0" with
"D".
3
0 0 1 4 1 7 h Hours run, solar circuit pump In conjunction with Viessmann solar control module:
The hours run can be reset to "0" with "D".
5
0 0 1 4 2 5 Pump starts, solar circuit pump In conjunction with Viessmann solar control module:
Pump starts can be reset to "0" with "D".
6
0 0 0 5 0 6 h Hours run, output 22 In conjunction with Viessmann solar control module:
Only if a second circulation pump is connected.
The hours run can be reset to "0" with "D".
7
Calling up
Checking information and resetting values
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Shown on display Meaning Notes
0 0 0 5 0 6 Pump starts, output 22 In conjunction with Viessmann solar control module:
Only if a second circulation pump is connected.
Pump starts can be reset to "0" with "D".
8
0 0 2 8 5 0 Solar yield in kWh In conjunction with Viessmann solar control module:
The yielded solar energy can be reset to "0" with "D".
9
4 Reception quality for
Vitocom 100, type GSM
In conjunction with Vitocom 100, type GSM
"0" No reception
"5" Very good reception
1 2
Checking service messages
Your heating contractor can set a service interval. For
example, service after 2500 hours run by the burner or
service after 12 months.
If your heating system is due for a service, " " flashes
on the display and the expired service interval is
shown.
Example:
Service display with the service interval of 2500 hours
run by the burner:
0
ë
2 5 0h
Fig. 4
Service display with the service interval of 12 months:
1
ë
2
Fig. 5
Please notify your heating contractor. Acknowledge the
service message with OK.
Note
If the service cannot be carried out until later, the serv-
ice message will reappear after 7 days.
Calling up an acknowledged service message
Press OK for approximately 4 seconds.
Checking fault messages
If any faults have occurred in your heating system, the
" " symbol flashes on the display and the fault code
is shown. The red fault indicator also flashes: See
page 24.
Calling up
Checking information and resetting values (cont.)
5592683

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Example:
Fault code shown: "50"
1 5 0
ã
Fig. 6
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. If a fault occurs
repeatedly, notify your contractor so the cause
can be analysed and the fault rectified.
1. Inform your contractor of the fault code. This ena-
bles the contractor to be better prepared and may
save additional travelling costs.
2. Acknowledge the fault message with OK. The " "
symbol no longer flashes.
Note
■If you have connected a message facility to indi-
cate fault messages (e.g. a buzzer), this is deac-
tivated when the fault message is acknowledged.
■If the fault cannot be rectified until later, the fault
message will reappear the following day.
Calling up an acknowledged fault message
Press OK for approximately 4 seconds.
Note
If there are several fault messages, you can call these
up one after the other with / .
Calling up
Checking fault messages (cont.)
5592683