System air Topvex SC Troubleshooting guide

Document in original language | 214959 · A004
Air Handling Unit
Topvex SC, TC
Operation and Maintenance Instructions GB

214959 | A004
© Copyright Systemair AB
All rights reserved
E&OE
Systemair AB reserves the rights to alter their products without notice.
This also applies to products already ordered, as long as it does not affect the previously agreed specifications.

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Contents
1 Overview ......................................................1
1.1 Intended use .........................................1
1.2 Disclaimer ............................................1
1.3 Warranty..............................................1
2 Warnings.......................................................1
3 Warnings signs on product ................................2
4 Product description..........................................3
4.1 Supply and extract air fans .......................3
4.2 Pressure transmitter fans/filters ................3
4.3 Supply and extract air filters......................3
4.4 Heat exchanger .....................................3
4.5 Temperature sensor................................3
4.6 Water heating coil ..................................3
4.7 Electric heating coil.................................3
4.8 Internal components position....................4
4.9 Access control cabinet.............................6
5 Start up.........................................................7
5.1 NaviPad ...............................................7
6 Operation .................................................... 11
6.1 Controller settings ................................ 11
6.2 Advanced HMI (Human Machine
Interface) Settings ................................ 17
6.3 No communication ............................... 18
7 Maintenance ...... ............. ........... ........... ....... 19
7.1 Maintenance intervals ........................... 19
7.2 How to replace supply/extract air
filter..................................................20
7.3 How to clean NaviPad ........................... 20
7.4 How to clean the heat exchanger............. 20
7.5 How to clean the fans ........................... 21
7.6 How to clean hot water heating
coil....................................................21
7.7 How to clean the electric heating
coil....................................................22
7.8 How to clean the extract air louvres and
inlet diffusers ...................................... 22
7.9 Clean the outdoor air intake.................... 22
7.10 How to clean the duct system ................. 22
7.11 Where to reset tripped fuses................... 23
7.12 How to reset the manual overheat
protection (EL units).............................. 23
7.13 How to replace the fan module................ 24
7.14 How to replace the heat
exchanger .......................................... 24
7.15 Change the internal battery in control
unit CU27–C ........................................ 29
8 Troubleshooting............................................ 30
9 Alarms........................................................31
9.1 Alarm list............................................ 31
10 Service .......................................................32
11 EU Declaration of Conformity ........................... 33
12 General conditions......................................... 34
12.1 Standard tools .................................... 34
12.2 Spare parts and reference
documentation .................................... 34
13 Spare parts .................................................. 34

Overview |1
1 Overview
This manual includes the information required. If other accessories not included at delivery are in use, read their sepa-
rate instructions. The key to proper and safe operating is to read this manual thoroughly, use the air handling unit ac-
cording to given guidelines and follow all safety requirements.
1.1 Intended use
The air handling units are intended to provide ventilation and depending on settings, heat recovery, air heating or free
cooling. Topvex SC, TC are meant for indoor installation.
Sound levels exceeding 70 dB(A) may occur depending on model and size (see online catalogue at www.systemair.
com for detailed information).
1.2 Disclaimer
The manufacturer may not be held liable for any damage to people or property caused by improper installation, start-
up, use of the unit or failure to implement the procedures and instructions included in this manual.
1.3 Warranty
General conditions are applied if purchase contract not state otherwise.
These units are delivered complete, tested and ready for being operated. Any form of warranty will become null and
void in the event that the unit is modified without manufacturer’s authorisation. Carry out all the planned maintenance
according to Operation and maintenance instruction in a timely and proper way.
Wear parts are not covered by the warranty.
2 Warnings
The following admonitions will be presented in the different sections of the document:
Danger
• Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or
serious injury.
Warning
• Indicates a potentially hazardous situation that may result in minor or moderate injuries.
Caution
• Indicates a risk of damaging the product or prevent optimal operation.
Important
• This appliance can be used by children aged from 8 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision
or instruction concerning use of the appliance in a safe way and understand the hazards involved.
• Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.
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2| Warnings signs on product
3 Warnings signs on product
Warning signs located on the air handling units.
Fig. 1 Disconnect all supply circuits before access to terminals
Fig. 2 Rotating fan during 4 minutes rundown period
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Product description | 3
4 Product description
4.1 Supply and extract air fans
The fans have external rotor motors of EC type which are steplessly controlled individually by setting the control signal
to a fixed value. It is possible to program the speed in 3 steps (high/normal/low) depending on the programming of the
week schedule. The motor bearings are maintenance free. It is possible to remove the fans for cleaning, see chapter 7
for more information.
4.2 Pressure transmitter fans/filters
Two pressure transmitters are installed, each of the transmitters has two sensors. One sensor measure the differential
pressure over the inlet cone of the fan impellers to maintain the airflow at constant level (CAV function as standard).
The other sensor measure the differential pressure over the supply and extract air filters. When the pressure drop rea-
ches the set value, an alarm is triggered in Access control unit, which indicates that the filter needs to be replaced.
4.3 Supply and extract air filters
The filters are of bag filter type with filter quality ePM1 60% (F7) for the supply air filter and ePM10 60% (M5) for the
extract air filter. The filters need to be replaced when polluted. We recommend ordering original filters from Systemair.
4.4 Heat exchanger
Topvex SC, TC models are equipped with a counter flow heat exchanger and a by-pass damper. The operation of the
by-pass damper is automatic and depends on the set temperature or if defrosting is in operation.
For defrosting a pressure transmitter is installed which measure the differential pressure over the heat exchanger.
4.4.1 VDI 6022 Hygiene standard
If an operation stop of the air handling unit for more than 48 hours is planed, we advise against using cooling recovery.
This is to avoid microbial growth in eventual condensation water in the supply air.
4.5 Temperature sensor
4 temperature sensors (PT1000) are included in the unit from factory. The sensors are as follows:
• Supply air sensor
• Extract air temperature sensor
• Outdoor air temperature sensor
• Exhaust air temperature sensor
• Efficiency temperature sensor
The supply air sensor is loosely delivered with the unit and needs to be installed in the supply air duct externally from
the unit. See Installation instructions for more information.
4.6 Water heating coil
In air handling units with built in water heating coil the hot water coil is located next to the supply air connection. The
hot water coil can be either HWL (hot water coil, low power) or HWH (hot water coil, high power). The coil material is
copper piping with a frame of galvanized sheet steel and aluminium fins. The coil is equipped with venting and immer-
sion sensor for frost protection.
4.7 Electric heating coil
In air handling units with built in electrical heater the heating rods are located after the supply air fan in the airflow di-
rection. The material is stainless steel. The electrical heating coil has both automatic and manual overheating protec-
tion. Reset the manual overheat protection by pushing the red button on top of the electrical heater frame (figure 9).
The electrical heater is mechanically interlocked by an air flow sensor in the supply air. The power demand of the elec-
tric heating coil is controlled by Access control unit. The heat is controlled steplessly by a TTC triac control according to
the selected control function that is set in NaviPad control panel.
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4| Product description
4.8 Internal components position
4.8.1 Topvex SC
Fig. 3 Left hand unit
Supply air Exhaust air Outdoor air Extract air
Position Description
1Fan supply air
2 Fan extract air
3Filter supply air
4Filter extract air
5Heat exchanger
6Access control cabinet
7Damper by-pass outdoor air/Section defrosting (only units with section defrosting)
8Control box for section defrosting (only for unit with section defrosting)
9Internal electrical cabinet
10 Heating coil (EL or HWH/HWL)
11 Pressure transmitter supply air fan/extract air filter
12 Pressure transmitter extract air fan/supply air filter
13 Pressure transmitter defrosting exchanger
14 Air flow sensor (only for units with electric heating coil)
15 Condensation drain, outdoor air
16 Condensation drain, extract air
17 Water battery connection
18 Extract air temperature sensor (ETS)
19 Efficiency temperature sensor (EFS)
20 Outdoor air temperature sensor (OS)
21 Exhaust air temperature sensor (EHS)
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Product description | 5
4.8.2 Topvex TC
Fig. 4 Left hand unit
Supply air Exhaust air Outdoor air Extract air
Position Description
1Fan supply air
2 Fan extract air
3Filter supply air
4Filter extract air
5Heat exchanger
6Access control cabinet
7Damper by-pass outdoor air/Section defrosting (only units with section defrosting)
8Control box for section defrosting (only for unit with section defrosting)
9Internal electrical cabinet
10 Heating coil (EL or HWH/HWL)
11 Pressure transmitter supply air fan/extract air filter
12 Pressure transmitter extract air fan/supply air filter
13 Pressure transmitter defrosting exchanger
14 Air flow sensor (only for units with electric heating coil)
15 Condensation drain, outdoor air
16 Condensation drain, extract air
17 Water battery connection
18 Extract air temperature sensor (ETS)
19 Efficiency temperature sensor (EFS)
20 Outdoor air temperature sensor (OS)
21 Exhaust air temperature sensor (EHS)
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6| Product description
4.9 Access control cabinet
Danger
Disconnect the mains power supply to the unit before moving the Access control cabinet or opening the lid.
Warning
Before obtaining access to terminals, all supply circuits must be disconnected.
Access control cabinet is mounted on top of the unit. It is possible to remove the cabinet and mount it in a suitable loca-
tion, a control cabinet kit is available as an accessory.
The enclosure class for Access control cabinet is IP44. The dimensions are; length 450 mm, width 230 mm, height 92,5
mm.
Use one of the three flanges on the control cabinet to install accessories. If there is a need to change the type of flange
on one position, it’s possible to order additional flanges from Systemair. If Access control cabinet is mounted in an ex-
posed environment and a higher enclosure class is required, order a flange suitable for cable glands and replace the ex-
isting one (3).
Fig. 5
Position Description
1Control unit CU27–C
2Terminals
3Flange
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Start up |7
5 Start up
Read and follow carefully the installations instruction before start up.
Before stating up the unit check following points with power supply off.
• Check so the unit is placed horizontally
• Check inside the unit and secure that the unit is clean
• Check that all transport protection is removed
• Turn on the power supply
5.1 NaviPad
NaviPad is Systemair's user interface with a 7” capacitive touch screen. The user interface provides operation informa-
tion about the connected air handling units and allows you to control all functions. You navigate by pressing the
touchscreen, to activate a function, change setting or by reading values in real time.
After 5 min inactivity the screen activate sleep mode, you return to the screen you left by pressing the touchscreen.
After additional 10 min. inactivity you return to the system overview dashboard (Screen image: System dashboard)
and have to log in again.
Editable text and values are shown in blue and differs depending on user level.
Since the user interface of the air handling unit consists of a web server with web pages it is possible to use a computer
to browse the user interface. Identify the IP address of the air handling unit with NaviPad, see Example 8 and then write
it in the address field of an internet browser.
Important
• The air handling unit and the NaviPad as well as any computer has to be connected on a local network
with the same IP subnet.
• Chrome browser for computer is supported to navigate the web pages of the air handling unit.
• Menus and functions may differ depending on software version running in NaviPad.
Fig. 6 (1) NaviPad button, (2) USB connection, reboot button, (3) power supply and communication
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8|Start up
5.1.1 Start-up wizard
At the first start up of NaviPad you need to calibrate the screen by pressing lightly on the cross marks.
Then you will be requested to fill in following information:
• Language
• Time & Date
Available air handling units will be shown in the device list. Choose the air handling unit you want to pair with your Na-
viPad. Use CU27 control unit’s serial number in the air handling unit to be sure to pair the correct air handling unit with
NaviPad.
If the start-up wizard is cancelled it will start again during next power up of the NaviPad, this will continue until start-up
wizard is successfully finished.
Version: PR1.2 (1.1.0.128) and later
Start-up wizard started
↓
Scan for air handling units
↓
Show air handling units selection
menu ← 0 Numbers of air handling units detected
≥1
↓
User input
Select air handling unit
↓
Select language
↓
Set Time & Date
↓
System overview dashboard
After the start-up wizard is completed the system overview dashboard is shown. Press on the symbol of the air han-
dling unit to access the unit's home page.
Home > Available devices 2020–10–22
Unit name
Normal operation
Screen image: System dashboard
Note:
You can always return to system overview dashboard by pressing the NaviPad button, figure 6, (1).
Version: PR1.5 (1.5.0.238) and later:
- wake up screen with short press (<1 sec.)
- return to system dashboard with long press (>1 sec.)
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Start up |9
5.1.2 Home page
Menus and functions may differ depending on actual configuration and/or application version running in the air handling
unit.
Unit name 2020–10–22
Running mode Outdoor Supply
Normal speed 31.3 °C 16.1 °C
Extended run Setpoint adjustment
120
min
-2°C +2°C0
Screen image: The home page shows an overview of the air handling unit operation status.
5.1.3 Key board
When a name, value or password need to be changed/written a key board will appear at the bottom of the
touchscreen.
5.1.4 Symbol description
Home (home page)
Data and settings
Shows operating information and settings
Flow diagram
A schematic overview of the air handling unit and its components
Language
Change language
Time and date
Weekly schedule
Configuration
Alarm and functions configurations, I/O allocation settings
System information
Shows information about the air handling unit, installation site, control unit, communication and the
Systemair product.
Alarm symbol, indicates if there are active alarms. One press on the symbol will direct you to the alarm
list.
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10 |Start up
5.1.5 User levels
End user
When logged out
Read /write privileges — Home page
Possible actions in end user mode are to stop the air handling unit for
maintenance (e.g. filter exchange), change the time for extended run and
change the temperature setpoint.
Flow diagram and active alarms in alarm list are visible.
Operator mode — log in
with 1111
Logged in
Read and write privileges (except Configuration).
Acknowledge/block/unblock alarms and view the alarm history.
Service mode — log in
with 0612
Logged in
Full read and write privileges.
5.1.6 Log in
Log in with service mode using password 0612.
Overview:
Service
0612
Login
Step by step:
1. Open the log in window
2. Select service from drop down list
3. Type in password 0612
4. Press Login.
5.1.7 Configuration wizard
A configuration wizard is available in the configuration menu . This could be used for the most common
configurations.
See enclosed Quick Configuration guide for more information.
Configuration >Configuration wizard 2020–10–22
Set up pressure control >
Set up cooler >
Set up change over >
Exit to configuration manu Complete configuration wizard >
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Operation |11
6 Operation
6.1 Controller settings
Menus and functions may differ depending on actual configuration and/or application version running in the air handling
unit.
6.1.1 Data & Settings
Data & Settings 2020–10–22
Operation overview >
In-/Output status >
Temperature control >
Fan control >
Demand control >
Fire/Smoke >
Alarm list >
6.1.1.1 Operation overview
Value of active signals
I/O signals and operation mode.
• Temperature
• Air flow/pressure
• CO2
• RH
• Heating
• Exchanger
• Cooler
• Recirculation
6.1.1.2 In- and output status
I/O status
Total overview of:
• Sensors
• I/O
• Fan control
• Temperature sequencing
• Running mode
• Device status
All can be controlled in manual mode.
• Manual setting of temperature sensor
• Locking of fans at adjustment
• Manually I/O testing of external functions
• Raw values
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12 |Operation
6.1.1.3 Temperature control
Settings for temperature.
• Limit values
•Setpoint for current control type (Example 1)
• Min/max limitation
• Outdoor temperature values
Example 1: Setpoint for current control type
Data & Settings > Temperature control > Supply air controller 2020–10–22
Supply air temperature 10.4 °C
Setpoint adjustment 0 °C
Setpoint adjustment low speed 0 °C
Setpoint adjustment high speed 0 °C
Setpoint Supply air 18 °C
Example show temperature control type set to supply air. To change the setpoint, press on the current value and
change to desired setting in the following pop-up menu. Confirm with ok. (Editable text and values are shown in blue
on NaviPad.)
6.1.1.4 Fan control
Settings for fan control.
• Setpoint for different fan speed
• Fan compensation e.g. outdoor compensated fan curves
• Start delay of fans, shut of dampers etc.
• SFP menu
• External fans
6.1.1.5 Demand control
Settings for:
• CO2
• Recirculation
• Support control
• Free cooling
6.1.1.6 Fire/Smoke
Settings for:
• Fire dampers
• Smoke detector status
• Fire damper test
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Operation |13
6.1.1.7 Humidity control
Setpoints and settings for dehumidification and humidification
6.1.2 Flow chart
Flow diagram 2020–10–22
199 Pa
198 Pa
18 000 m³/h
18 000 m³/h
100 %
54 Pa
34 Pa
22,1 °C
22,1 °C
-6,8 °C
-12,2 °C
71 %
74 %
16,7 °C
21,8 °C
19,9 °C
25 % RH71 % RH
32 % RH
84 % h
Open
Open
0 %
OFF
42 %
ON
Dynamic flow chart of current configured air handling unit. Active sensors and components are visible
with values shown in real time. When pressing on values or items marked in blue you will be forwarded
to related settings and/or overview page.
6.1.3 Language
Settings of language.
• To synchronize NaviPad with all connected air handling units, go to system dashboard by pressing the
NaviPad button. Press and , choose language.
• Using in selected air handling units homepage via NaviPad or computer will only change language
in the selected air handling unit.
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14 |Operation
6.1.4 Time Settings
In this menu date and time can be changed as well as other system settings.
Settings for:
• Date and time
•Schedule for operating time (Example 2 & 3)
• Schedule for holiday
• Schedule for extra time groups
Each day has up to two individual running periods, set desired start and stop time.
For holidays, set the dates in Time settings > Schedule > Holiday calendar and the time in
Time settings > Schedule > Fan Low Speed/Fan Normal Speed/High Speed.
The fan speeds have different priority, if normal speed is desired 05:00-18:00 and remaining part of the day on low
speed, set the normal speed to 05:00-18:00 and low speed on 00:00-24:00.
Example 2: Schedule for normal fan speed
Time settings > Schedule > Fan Normal Speed 2020–10–22
Start Stop Start Stop
Monday
(12–hour clock system) 5:00 AM 6:00 PM 12:00 AM 12:00 AM
Monday
(24–hour clock system) 05:00 18:00 00:00 00:00
In above example, the air handling unit starts at a normal fan speed at 5:00 AM (05:00) and stops at 6:00 PM (18:00).
The second running period is deactivated.
Example 3: Schedule for low fan speed
Time settings > Schedule > Fan Low Speed 2020–10–22
Start Stop Start Stop
Monday
(12–hour clock system) 6:00 PM 24:00 AM 12:00 AM 5:00 AM
Monday
(24–hour clock system) 18:00 24:00 00:00 05:00
In above example, the air handling unit starts at a low fan speed at 6:00 AM (18:00) and stops at 24:00 AM (24:00).
The second running period on low fan speed is between 12:00 AM (00:00) and 5:00 AM (05:00).
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Operation |15
6.1.5 Configuration
• System settings
•Configuration wizard (Example 4)
•Function configuration (Example 5)
• I/O allocation settings
•Alarm configuration (Example 6)
• PID controllers
The configuration wizard is a menu that simplify the procedure to Activate and Configure common accessories and
functions and Allocate it’s in- and outputs. The wizard makes necessary configurations automatically and guide the user
through limited options.
Example 4: Configuration wizard
Configuration >Configuration wizard 2020–10–22
Set up pressure control >
Set up cooler >
Set up changeover >
Exit to configuration menu >Complete configuration wizard >
If the configuration wizard does not cover the desired accessory or function it can still be configured via the configura-
tion menu.
Example 5: Function configuration
Configuration > Functions > Function activation 2020–10–22
Fan compensation curves Yes
Support control No
CO2 Control No
To activate a function go to Function activation. Choose function to activate and set Yes in the following pop-up
menu. Values for the activated function are now visible and can be adjusted in Data Settings.
If required, allocate in- and outputs in I/O allocation settings.
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16 |Operation
Example 6: Alarm configuration
Configuration > Alarms 2020–10–22
Alarm delay at start up 60 s
Search alarm no: 53 Filter alarm supply air >
Air and temperature control >
Extra functions >
Extra sensors and alarms >
Fire/Smoke >
Component malfunction >
Manual operation and warnings >
Configuration > ... > Filter alarm supply air 2020–10–22
Action: No action
Level: Class B
Delay: 300 s Limit X1: 0 m3/h Limit Y1: 10 Pa
No: 53 Limit X2: 2000 m3/h Limit Y2: 150 Pa
Name: Filter alarm supply air
Original name: Filter alarm supply air
6.1.6 System information
Shows information about the air handling unit, installation site, control unit, communication and the
Systemair product. To enter information, such as site specific unit name or server partner’s contact
information, go to System information setup with user level Service.
Example 7: System information
System information 2020–10–22
Unit information
Installation address
Service partner
Communication
Access Control Unit
Systemair product
System information setup >
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