System air SAVE VTC 300 Manual

Document in original language | 211464 · A001
SAVE VTC 300
Installation and Service GB

211464 | A001
© Copyright Systemair UAB
All rights reserved
E&OE
Systemair UAB reserves the rights to change their products without notice.
This also applies to products already ordered, as long as it does not affect the previously agreed specifications.
Systemair is not liable or bound by the warranty if these instructions are not adhered to during installation or service.

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Contents
1 Declaration of Conformity .................................1
2 Disposal and recycling ......................................2
3 Warnings.......................................................2
4 Product information .........................................2
4.1 General................................................2
4.2 Installation recommendation regarding
condensation ........................................3
4.2.1 Condensation inside of the
unit.........................................3
4.2.2 Condensation outside of the
unit.........................................3
4.3 Transport and storage .............................3
4.4 Technical Data .......................................4
4.4.1 Dimensions and Weight ...............4
4.4.2 Power consumption and fuse
size.........................................5
5 Installation.....................................................5
5.1 Unpacking ............................................5
5.2 Where/how to install ..............................6
5.3 Installing the Unit ...................................6
5.3.1 Installation Procedure SAVE
VTC 300 ..................................6
5.3.2 Electrical Connections..................7
6 SAVECair control .............................................9
6.1 General................................................9
6.2 Startup wizard .......................................9
6.3 Common symbols................................. 10
6.4 Menu overview ................................... 10
6.5 Home screen....................................... 11
6.5.1 User modes ............................ 11
6.5.2 Temperature settings ................ 13
6.5.3 Airflow settings ....................... 13
6.5.4 Indoor Air Quality ..................... 14
6.5.5 Status line .............................. 14
6.6 Description of User function icons ............ 14
6.7 Main menu ......................................... 15
6.7.1 Unit Information ................ 15
6.7.2 Alarms .................................16
6.7.3 Week Schedule......................19
6.7.4 Filter .................................20
6.7.5 System Preferences.............21
6.7.6 Service ...............................21
6.7.7 Help .....................................27
7 Before starting the system .............................. 28
8 Service .......................................................28
8.1 Warnings............................................ 28
8.2 Internal Components............................. 29
8.2.1 Description of
Components ........................... 29
8.3 Troubleshooting................................... 30
9 Accessories.................................................. 32
9.1 Internet Access Module (IAM) ................. 32
9.1.1 Mobile application and
Login.....................................32
9.2 Indoor air quality sensors ....................... 32
9.3 Temperature control ............................. 34
9.3.1 Electrical reheater .................... 34
9.3.2 Electrical duct pre-
heater ...................................36
9.3.3 Duct water heater .................... 37
9.3.4 Duct water cooler..................... 38
9.3.5 Change-over coil (DX) ............... 40
9.4 Airflow control..................................... 41
9.4.1 VAV/CAV conversion kit............. 41
9.5 Installation/Maintenance ....................... 42
9.5.1 Outdoor/Exhaust air
dampers................................. 42
9.6 Filters ................................................ 43

Declaration of Conformity | 1
1 Declaration of Conformity
Manufacturer
Systemair UAB
Linų st. 101
LT–20174 Ukmergė, LITHUANIA
Office: [phone] Fax: [phone]
www.systemair.com
hereby confirms that the following product:
Heat recovery ventilation unit: SAVE VTC 300
(The declaration applies only to product in the condition it was delivered in and installed in the facility in accordance
with the included installation instructions. The insurance does not cover components that are added or actions carried
out subsequently on the product).
Comply with all applicable requirements in the following directives:
• Machinery Directive 2006/42/EC
• Low Voltage Directive 2014/35/EU
• EMC Directive 2014/30/EU
• Ecodesign Directive 2009/125/EC
The following regulations are applied in applicable parts:
1253/2014 Requirements for ventilation units
1254/2014 Energy labelling of residential ventilation units
327/2011 Requirements for fans above 125 W
The following harmonized standards are applied in applicable parts:
EN ISO 12100:2010 Safety of machinery - General principles for design - Risk assessment and risk reduction
EN 13857 Safety of machinery – Safety distances to prevent hazard zones being reached by upper or
lower limbs
EN 60 335-1 Household and similar electrical appliances – Safety Part 1: General requirements
EN 60 335-2-40 Safety of household and similar electrical appliances – Part 2-40: Particular requirements
for electrical heat pumps, air-conditioners and dehumidifiers
EN 62233 Measurement methods for electromagnetic fields of household appliances and similar
apparatus with regard to human exposure
EN 50 106:2007 Safety of household and similar appliances – Particular rules for routine tests referring to
appliances under the scope of EN 60 335-1 and EN 60967
EN 61000-6-2 Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity for industrial
environments
EN 61000-6-3 Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission standards for
residential, commercial and light-industrial environments
Skinnskatteberg, 13-08-2017
Mats Sándor
Technical Director
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2| Disposal and recycling
2 Disposal and recycling
This product is compliant to the WEEE directive. When disposing the unit, follow your local rules
and regulations.
This product packing materials are recyclable and can be reused. Do not dispose in household
waste.
3 Warnings
Danger
• Make sure that the mains supply to the unit is disconnected before performing any maintenance or
electrical work!
• All electrical connections and maintenance work must be carried out by an authorized installer and in
accordance with local rules and regulations.
Warning
• This product must only be operated by a person who has suitable knowledge or training within this field
or carried out with the supervision of a suitably qualified person.
• Beware of sharp edges during mounting and maintenance. Use protective gloves.
Warning
• All though the mains supply to the unit has been disconnected there is still risk for injury due to rotating
parts that have not come to a complete standstill.
Important
• The installation of the unit and complete ventilation system must be performed by an authorized installer
and in accordance with local rules and regulations.
• The system should operate continuously, and only be stopped for maintenance/service.
• Do not connect tumble dryers to the ventilation system.
• Duct connections/duct ends must be covered during storage and installation.
• Make sure that filters are mounted before starting the unit.
4 Product information
4.1 General
This installation manual concerns air handling unit type SAVE VTC 300 manufactured by Systemair.
SAVE VTC 300 include the following model options:
Right or Left models: R (Right), L(Left) (see figure 2).
Re-heater battery (electrical or water heating battery) is optional and can be ordered as an accessory.
This manual consists of basic information and recommendations concerning the design, installation, start-up and opera-
tion, to ensure a proper fail-free operation of the unit.
The key to proper and safe operating of the unit is to read this manual thoroughly, use the unit according to given
guidelines and follow all safety requirements.
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Product information | 3
4.2 Installation recommendation regarding condensation
4.2.1 Condensation inside of the unit
When the unit is installed in a cold attic (close to outdoor temperature) the unit should run continuously. If the unit is in-
tended to be stopped by the user manually or due to calendar function we recommend to install air tight dampers at ex-
tract and supply air ducts. The dampers will ensure that no air circulates from the warm parts of the building through
the unit to outside (chimney effect). If no dampers are installed there is risk of condensation inside the unit and the out-
door ducts during these stop periods. It also might be that cold air from outside could pass the unit and enter into the
building. That could cause condensation outside the supply and extract air ducts and even at the valves in the rooms.
When the unit is not running due to late commissioning in winter time, the supply and extract air ducts should be dis-
connected and closed due to above mentioned effects until commissioning and regular operation.
4.2.2 Condensation outside of the unit
When the unit is installed in warm humid areas (like laundry) together with low outdoor temperature there is a certain
point where moisture can condense outside of the casing. The condensation relation to indoor relative humidity, room
and outdoor temperature is shown diagram below. The condensation outside of the unit do not occur in zones bellow
each curve.
Important
Recommendation: If condensation occurs, increase ventilation in area close to the unit.
1. Room temperature 20°C
2. Room temperature 22°C
3. Room temperature 24°C
4. Room temperature 26°C
Examples when condensation outside of the unit can occur:
Example A: If the unit is installed in room where temperature is 22°C, outside temperature is –15°C, then dew will start
accumulating when relative humidity is 46% and higher.
Example B: If the unit is installed in room where temperature is 20°C, outside temperature is –25°C, then dew will start
accumulating when relative humidity is 34% and higher.
4.3 Transport and storage
The SAVE VTC 300 should be stored and transported in such a way that it is protected against physical damage that can
harm panels etc. It should be covered so dust, rain and snow cannot enter and damage the unit and its components.
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4| Product information
The appliance is delivered in one piece containing all necessary components, wrapped in plastic on a pallet for easy
transportation.
4.4 Technical Data
4.4.1 Dimensions and Weight
Fig. 1 Dimensions of right hand unit
* Inspection hatch.
** Drainage.
The unit weight is 72 kg.
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4.4.1.1 Connections Right and Left Models
Fig. 2 Right and Left models
Position Description
RRight hand model (Supply air connection and control panel is situated on the right hand side of the unit viewed from the front)
LLeft hand model (Supply air connection and control panel is situated on the left hand side of the unit viewed from the front)
Table 1 Symbol description
Symbol Description
ASupply air
BExhaust air
COutdoor air
DExtract air
4.4.2 Power consumption and fuse size
Table 2 Power Consumption
Model Fans (W ) Heater (W) Total (W) Fuse (mains) (A)
VTC 300 170 –170 10
VTC 300 with reheater 170 1700 1870 10
5 Installation
This section describes how to install the unit correctly. To ensure a proper and fail free operation it is important that the
unit is installed according to these instructions.
5.1 Unpacking
Verify that all ordered equipment are delivered before starting the installation. Any discrepancies from the ordered
equipment must be reported to the supplier of Systemair products.
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6| Installation
5.2 Where/how to install
SAVE VTC 300 are meant for indoor installation in a heated space. Mount the unit on a vertical flat surface. It’s impor-
tant that the unit is completely levelled before it is put into operation.
Place the unit preferably in a separate room (e.g. storage, laundry room or similar).
When choosing the location it should be kept in mind that the unit requires maintenance regularly and that the inspec-
tion door should be easily accessible. Leave free space for opening the door and for taking out the main components
(figure 1).
The outdoor air intake of the building should if possible be put in the northern or eastern side of the building and away
from other exhaust outlets like kitchen fan exhausts or laundry room outlets.
5.3 Installing the Unit
The unit must be installed in the following position (figure 3). It is important that the unit is completely vertical in order
for the condensation drainage to work properly.
Fig. 3 Installation position (right hand unit)
5.3.1 Installation Procedure SAVE VTC 300
1 Prepare the surface where the unit is to be mounted.
Make sure that the surface is flat, levelled and that it
supports the weight of the unit. Perform the installa-
tion in accordance with local rules and regulations.
2 Fit the mounting bracket (pos. 1) with the anti vibra-
tion pad (pos. 2) to the wall with enclosed screws.
Use appropriate holes to screw the bracket firmly to
the wall. Bottom side of bracket should be 40 mm (H)
below top of unit position.
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3 Lift the unit in place
Warning
Beware of sharp edges during mounting
and maintenance. Use protective gloves
Note:
Assure that the unit is completely vertical
once mounted on the wall. The unit must
not be tipping forward in order for the
condensation drainage to function.
4 Connect the condensate drainage to the 2 drain plugs
in the bottom of the unit. Make sure to use correct
drain traps on both connections. The height (H) must
be at least 60 mm. Drain traps are not included on de-
livery and can not be obtained from Systemair.
5 Connect the unit to the duct system. Make sure that
all necessary accessories are used to create a func-
tional ventilation solution.
Warning
The installation of the unit and complete
ventilation system must be performed by
an authorized installer and in accordance
with local rules and regulations.
6 Connect the unit electrically to the mains with the en-
closed plug and check that it starts up correctly.
5.3.2 Electrical Connections
The SAVE VTC 300 is wired internally from factory. The electrical connection box can be found in the supply air fan com-
partment. The top cover plate is removed by removing 2 screws in the lower front edge of the cover plate (figure 4).
All external connections to possible accessories are made to terminals on the connection board (chapter 5.3.2.2).
Fig. 4 Opening the electrical connection box
Danger
• Make sure that the Mains supply to the unit is disconnected before performing any maintenance or
electrical work!
• All electrical connections must be carried out by an authorized installer and in accordance with local rules
and regulations.
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8| Installation
5.3.2.1 Main board layout
The SAVE VTC 300 is equipped with built-in regulation and internal wiring.
The figure shows the main circuit board. See wiring diagram for more information.
Fig. 5 Main circuit board connections
Position Description
MB Main circuit board
CB Connection to the external connection box
1Terminals for a heater
2Terminals for a TRIAC
3Terminals for the mains power supply
4Terminals for power supply of extract air fan
5Terminals for power supply of supply air fan
6Terminals for internal relative humidity/temperature sensor
7Analog input 1 — Outdoor air sensor
8Analog input 2 — Supply air sensor
9Analog input 3 — Freely configurable
10 Analog input 4 — Freely configurable / Overheat temperature sensor (units with
heater)
11 Analog input 5 — Freely configurable
12 Digital input 1 — Rotor guard sensor (VSR, VTR units)/ Damper signal (VTC units)
13 Digital input 2 — Freely configurable / Cooker hood (VTR 150/K unit)
14 Analog output 2 — Freely configurable / Electrical heater controller (VTC 700 unit)
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Position Description
15 Analog output 1 — Rotor of the heat exchanger (VSR, VTR units) / Damper control
(VTC units)
16 Terminals for speed control of extract air fan
17 Terminals for speed control of supply air fan
5.3.2.2 External connections (Connection board)
External connections to the main circuit board are done via connection board situated outside of the unit.
Fig. 6 External connection box and board
Position Description
1Connection to the main circuit board
2Connection for external control panel (HMI) or Internet access module (IAM)
3Modbus RS485 connection
AI6–7 Freely configurable Analog input. None/Input type selection in HMI.
DO1–4 Freely configurable Digital output. None/Output type selection in HMI.
AO3–5 Freely configurable Analog output. None/Output type selection in HMI. Actuator type 0–10V, 10–
0V, 2–10V, 10–2V.
UI1–5 Freely configurable Universal input. Can be configured to act as Analogue input (0–10V) or as
Digital input (24V). None/Input type selection in HMI (NC or NO polarity).
24V Maximum current 200mA at 24VDC +-10%.
6 SAVECair control
6.1 General
SAVECair is a modern touchscreen LCD control panel, simply known as HMI — Human Machine Interface. The
touchscreen display provides information about current state of the unit and allows you to control all system functions.
Settings are done by touching the icons or options. The touch screen is sensitive and it is not necessary to press too
hard.
6.2 Startup wizard
During the first power up of the unit, you will be asked to set:
• menu language
• time and date
• airflow control type (Manual/RPM) and airflow level values
• heater type (None/Electrical/Water/Change-over)
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If the start-up wizard is cancelled it will start again during next power up of the unit, this will continue until start-up wiz-
ard is successfully finished.
6.3 Common symbols
The following selection symbols are common and are present in most menu pages:
Back button to return to a previous
menu, located at the upper left corner
On and Off slider to activate or
deactivate a function. White bubble —
function is inactive, green bubble —
function is active.
Up arrow to increase a value CANCEL Button to cancel changes
Down arrow to decrease a value SET/OK Buttons to confirm changes
Many options show up in a form of the pop-up window. Select the option from the displayed list in the pop-up window
and press OK to confirm selection.
6.4 Menu overview
A.Return to home screen
B. Basic read-only information about the unit
C. Currently active alarms and alarm history
D. Configure and check week schedule
E. Check and change remaining time till filter
change
F. General system preferences
G.Configuration of all system parameters
H.Help and troubleshooting menu
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6.5 Home screen
Touching home icon (pos. A) in drop-
down menu list (pos. 1) will always returns you
to home screen after commissioning.
1. Drop-down menu list
2. Active user mode
3. Airflow settings
4. Temperature settings
5. List of active alarms
6. Icon list of active user functions
6.5.1 User modes
The first icon at the top of home screen shows currently active user mode. To change the user mode, touch the active
user mode icon (pos. 2) and select a new user mode from the list. The unit has 2 permanent and 5 temporary user
modes available for selection. Only one mode can be active at a time.
Settings of all modes can be modified in Service menu.
6.5.1.1 Permanent modes
Permanent modes are always active unless interrupted by temporary modes, activated user functions or alarms:
Icon Text Description
AUTO
Automatic airflow control. AUTO mode is available for selection when Demand
Control,Week Schedule and/or external fan control functions are configured,
otherwise AUTO mode icon won’t be visible in active user modes menu. AUTO
mode activates Demand Control,Week Schedule and/or external fan control
functions. Demand is available to choose as airflow setting in Week Schedule.
MANUAL
Manual selection of airflow levels. The unit can be set run at one out of four
available airflow speeds: Off/Low/Normal/High.
Note:
The fan can be set to OFF by activating Manual Fan Stop function in
Service menu.
6.5.1.2 Temporary modes
Temporary modes are active only for a set period of time unless interrupted by active user modes, activated user func-
tions or alarms:
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Icon Text Description
HOLIDAY
Sets speed of both supply and extract air fans to Low levels when user is away
from home for a long period of time.
ECO mode is active.
Delay in days.
CROWDED
Sets speed of both supply and extract air fans to maximum High levels and
temperature setpoint offset to –3 K when apartment is more crowded than usual.
Default temperature setpoint offset is –3 K.
Delay in hours.
AWAY
Sets speed of both supply and extract air fans to Low levels when user is away
from home for a short period of time.
ECO mode is active.
Delay in hours.
REFRESH
Sets speed of both supply and extract air fans to maximum High levels to
replace indoor air with a fresh air in a short period of time.
Delay in minutes.
FIREPLACE
Sets speed of supply air fan to High level and extract air fan to Low level to
increase air pressure within the apartment for better smoke extraction through
the chimney.
Delay in minutes.
Settings of all modes can be modified in Service menu.
Temporary modes and user functions are active only for a set period of time after which they are terminated and the
unit changes back to a former AUTO or MANUAL mode, depending on which one was active before temporary mode or
user function was activated.
6.5.1.3 Digital input functions
Digital input functions always active while digital input is activated.
Icon Text Description
Central
Vacuum
Cleaner
Function sets speed of supply air fan to High level and extract air fan to Low
level to increase air pressure within the apartment for better dust collection
through central vacuum cleaner.
Function can be activated via digital input — Central Vacuum Cleaner
Function.
Cooker Hood
Sets speed of supply air fan to High level and extract air fan to Low level to
increase air pressure within the apartment for better airborne grease and steam
collection in the kitchen.
Function can be activated via digital input — Cooker Hood Function.
6.5.1.4 Digital input and Mode hierarchy
User modes and functions have a different hierarchy. User functions activated via HMI or mobile APP, such as AWAY,
CROWDED,FIREPLACE,HOLIDAY and REFRESH, are interrupted by manual selection of AUTO and MANUAL fan modes.
AFIREPLACE function has the highest priority between user functions. Other functions activated via HMI/APP can in-
terrupt each other.
If FIREPLACE function is hard-wired on the connection board and configured as digital input (DI) then it has a higher
priority than AUTO and MANUAL mode. Digital input for a FIREPLACE function has also a higher priority than other
hard-wired digital inputs (DI) for: AWAY,CENTRAL VACUUM CLEANER,COOKER HOOD,CROWDED,HOLIDAY or REFRESH.
Digital input and Mode hierarchy:
1. EXTERNAL STOP
2. FIREPLACE function
3. COOKER HOOD,CENTRAL VACUUM CLEANER,CROWDED,REFRESH functions
4. AWAY,CROWDED functions
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6.5.2 Temperature settings
Temperature can be set at SET TEMPERATURE menu accessible from the home screen by touching
TEMPERATURE icon with thermometer. Default temperature value is 18°C (range 12–30°C).
Use up and down arrows or a slider to change the value.
Then touch the SET to confirm changes.
Temperature set point is for room air temperature, supply air temperature or for extract air temperature depending on
which control mode is active. Default setting is Supply air temperature control.
Control mode of the temperature can be changed in Service menu.
6.5.2.1 ECO mode
ECO mode is a power saving function that can be activated in SET TEMPERATURE menu.
While ECO mode is active, a temperature setpoint at which heater is activated is lowered to avoid activation of the heat-
er during cold nighttime.
If the temperature is very low and the heater is activated during the nighttime (even with lowered temperature set-
point), then during the upcoming daytime indoor temperature will be increased using the heat exchanger so that accu-
mulated heat could be used during the next cold nighttime, the lowered setpoint for the heater remains.
ECO mode will have impact for the following user
functions/modes if selected: ECO mode is always activated by the following modes:
•AUTO mode
•MANUAL mode
•AWAY mode
•HOLIDAY mode
•CENTRAL VACUUM CLEANER function
•COOKER HOOD function
•FIREPLACE mode
•AWAY mode
•HOLIDAY mode
ECO mode is always deactivated by the following user
functions/modes:
•CROWDED mode
•REFRESH mode
•FREE COOLING function
6.5.3 Airflow settings
Airflow settings are available only in MANUAL mode. Click on fan icon on the main screen to enter SET
AIRFLOW menu.
Use up and down arrows or a slider to change the airflow value.
The airflow may be adjusted in these steps: Off/Low/Normal/High. These settings control output signals to the sup-
ply and extract fans.
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Important
It is not recommended to set fan to Off in standard households. If manual fan stop is activated, the unit
should be provided with dampers in exhaust and fresh air ducts to avoid cold draught and risk of
condensation when the unit has been stopped.
The fan can be set to Off by activating Manual Fan Stop function in Service menu.
6.5.4 Indoor Air Quality
The unit automatically controls indoor humidity and/or CO2levels by adjusting airflow setting. Airflow is
increased if air quality is decreasing.
Demand Control function is responsible for IAQ (Indoor Air Quality) regulation. Relative humidity (RH) and/or CO2sen-
sors are responsible for IAQ monitoring.
Indoor air quality (IAQ) indicator is available if AUTO mode and Demand Control function is activated.
IAQ levels:
•ECONOMIC: Actual IAQ value is below low IAQ set point.
•GOOD: Actual IAQ value is between low and high IAQ limits.
•IMPROVING: Actual IAQ value is above high IAQ set point.
Different airflow settings can be set for IMPROVING and GOOD IAQ levels in Service menu.
Setpoint for relative humidity and CO2level can be set in Service menu.
6.5.5 Status line
Status line located at the bottom area of home screen displays information about:
List of active alarms. See
chapter 6.7.2.3 for more
information.
List of active user functions.
See chapter 6.6 for more
information.
Touching any of these lines will move you to the next page with more detailed list and information about each alarm or
active user function.
6.6 Description of User function icons
Icon Text Description
Heating Connected heater or pre-heater is active and air heating is in process.
Heat recovery Heat recovery from apartment is active.
Cooling Connected cooler is active and air cooling is in process.
Cooling
recovery
Automatic cooling recovery is active when extract air temperature from
apartment is lower than outdoor air temperature and there is a cooling demand
(temperature setpoint is lower than outdoor air temperature).
No cooling recovery with heating demand. If the outdoor air temperature is
higher than then thee indoor air temperature and there is a heating demand,
function Free heating is activated instead.
Free cooling Function decreases indoor air temperature by using only cool outdoor air during
nighttime to save energy consumption.
Moisture
transfer
Function controls the rotation speed of the heat exchanger to prevent moisture
transfer to supply air due to high relative humidity in the extract air.
Function is only available for units with Rotating type heat exchanger.
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Icon Text Description
Defrosting Function prevents formation of the ice on the heat exchanger during cold
outdoor temperatures.
Secondary air
Warm air from the living space is used to defrost the heat exchanger using a
damper inside the outdoor air duct. The unit switches from outdoor air to
secondary air while the extract air fan stops and warm secondary air increases
the temperature inside the heat exchanger.
Vacuum
cleaner
Function sets speed of supply air fan to High level and extract air fan to Low
level to increase air pressure within the apartment for better dust collection
through central vacuum cleaner.
Function can be activated via digital input — Central Vacuum Cleaner
Function.
Always active while digital input is activated.
Cooker hood
Sets speed of supply air fan to High level and extract air fan to Low level to
increase air pressure within the apartment for better airborne grease and steam
collection in the kitchen.
If a cooker hood with integrated fan is used, then it is recommended to set
airflow levels of both fans to Normal.
Function can be activated via digital input — Cooker Hood Function.
Always active while digital input is activated.
User lock
Function indicates that the system is locked with a password and cannot be
edited or settings changed in any way. System must be unlocked first to make
changes.
6.7 Main menu
User settings and advanced settings
6.7.1 Unit Information
A basic read-only information about status of the unit, configured components and inputs/outputs.
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6.7.1.1 Components
Type and settings of heat exchanger, heater, cooler, extra controller.
6.7.1.2 Sensors
Values from sensors and load of fans (rpm).
6.7.1.3 Input Status
Status of configured analog, digital and universal inputs. Connected component type and raw value (volts) is displayed.
6.7.1.4 Output Status
Status of configured analog, digital and universal outputs. Connected component type and value (volts) is displayed.
6.7.1.5 Unit Version
Unit model name, manufacturer number, serial number and unit software versions for Mainboard, HMI and IAM.
6.7.2 Alarms
A detailed information about active system alarms and alarm log of last 20 events.
6.7.2.1 Active Alarms
Alarm screen is empty if there are no active or logged alarms.
Press HELP button on the active alarm to access FAQ and troubleshooting (if available). Press ACKNOWLEDGE on the in-
dividual alarm to clear it. Depending on alarm type and the cause, it might be necessary to do a troubleshooting first to
acknowledge active alarm.
It may be not possible to clear the status of alarm if the cause of alarm is still present, as that would immediately trigger
alarm to return.
6.7.2.2 Alarms log
Alarm log allows to view last 20 alarms.
Each alarm contains information:
• Alarm name
• Date/time stamp
• Information if the alarm stops the unit or other note
6.7.2.3 Alarm list
Alarm name Explanation Do the following
Frost protection Frost protection of return water in
heating coil.
• Alarm stops the unit and opens
the water valve completely.
The alarm will reset once the water
temperature reaches 13°C.
Check the water fluid temperature in
heating coil.
Check the circulation pump of water
heater. Contact your installation
company or place of purchase.
Frost protection temperature
sensor
Indicates malfunction of water
heater temperature sensor.
• Alarm stops the unit.
Check that frost protection
temperature sensor is connected
properly and cable is not damaged.
Contact your installation company or
place of purchase.
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