Exhausto EXact2 VEX240 series Basic Instructions
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Exhausto EXact2 VEX240 series Basic Instructions

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3005167-2022-02-02
EXact2 control system
Basic instructions for VEX240-250-260-270-280 series
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EXHAUSTO
EXHAUSTO A/S
Odensevej 76
5550 Langeskov, Denmark
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EXHAUSTO
Tel.: +45 65 66 12 34
Fax: +45 65 66 11 10
exhausto@exhausto.dk
www.exhausto.dk
EXact2 VEX240-280
Original instructions

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Summary of Contents for Exhausto EXact2 VEX240 series

  • Page 1 EXact2 VEX240-280 3005167-2022-02-02 EXact2 control system Basic instructions for VEX240-250-260-270-280 series EXHAUSTO EXHAUSTO Original instructions EXHAUSTO A/S Tel.: +45 65 66 12 34 Odensevej 76 Fax: +45 65 66 11 10 5550 Langeskov, Denmark exhausto@exhausto.dk www.exhausto.dk...
  • Page 2 3005167-2022-02-02 Menu structure User menu: Technician and service menu: 1 Operating mode Main menu Manual Operation > Operating mode > Operating readings > °C Settings > 2 Operating readings Alarm and info > Time and weekly plan > Air temperature > Versions >...

  • Page 3: Table Of Contents

    3005167-2022-02-02 Symbols used in these instructions..............5 Software version....................5 Software version ..................... 5 1. User mode 1.1. HMI panel........................ 6 1.2. Display icons......................7 2. Operation, access codes and selection of language 2.1. Using the HMI panel....................9 2.1.1. Using keys within the menus................9 2.2.
  • Page 4 3005167-2022-02-02 Room temperature limits................46 Menu 3.1.9 - MXHP settings................46 Menu 3.1.10 - MCOCW settings..............46 Menu 5 - Time and weekly plan................47 Menu 5.1 - Date and time................47 Menu 5.2 - Weekly plan ................47 Menu 7 - Safety functions................... 48 Menu 7.1 - Fire alarm..................48 Menu 7.2 - Frost protection of HCW .............

  • Page 5: Symbols Used In These Instructions

    Symbols and software version 3005167-2022-02-02 Symbols and software version Symbols used in these instructions Prohibition symbol Failure to observe instructions marked with a prohibition symbol may result in serious or fatal injury. Danger symbol Failure to observe instructions marked with a danger symbol may result in personal injury and/or damage to the unit.

  • Page 6: User Mode

    Display Browse menu or set value Activate menu/confirm key Browse menu or set value mode EXHAUSTO If the front cover is extended, push it back in. The extra keys are for service tech- nician use only. EXHAUSTO EXHAUSTO 6/108...

  • Page 7: Display Icons

    User mode 3005167-2022-02-02 1.2 Display icons Icon Description Manual operation Timer overridden until next changeover in the timer schedule Timer, current indoor air quality level is comfort Timer, current indoor air quality level is economy Timer, current indoor air quality level is standby Timer, VEX/CX has stopped Timer, no changeover times defined in timer schedule BMS-controlled operation...
  • Page 8 User mode 3005167-2022-02-02 Icon Description External start/stop disconnected. See Electrical Installation Guide for further information Summertime Wintertime No communication on the external BUS, or communication between the VEX/CX and HMI is disconnected Fire alarm. Closed circuit open and the pre-set fire alarm function acti- vated Fire! Startup: Web server accessing database.

  • Page 9: Operation, Access Codes And Selection Of Language

    3005167-2022-02-02 language 2. Operation, access codes and selection of language 2.1 Using the HMI panel Keys for user mode or service mode EXHAUSTO EXHAUSTO HMI panel ready for every- HMI panel ready for service mode day use Display Service key cover 2.1.1 Using keys within the menus...

  • Page 10: Access Codes For Technician And Service Menus

    1111 code. ● The code for technician mode is1111 (some menus are hidden or read-only). EXHAUSTO recommends this mode is used for normal service tasks ● The code for specialist mode is 3142 (full ac- cess to all menus).

  • Page 11: Important When Servicing

    Operation, access codes and selection of 3005167-2022-02-02 language 2.3 IMPORTANT when servicing Do not open the service doors before the supply voltage has been disconnec- ted at the isolation switch. The isolation switch is positioned on the left side of the connection box on top of the unit. Weekly plan It is important to set ventilation to OFF when the weekly plan is active:...

  • Page 12: Auxiliary Service Panel

    Operation, access codes and selection of 3005167-2022-02-02 language If the VEX/CX is controlled via a BMS or Web server, BMS unit or Web these controls could override the OFF function and the server VEX/CX may start up irregularly. To disconnect the BMS or WEB server connection, you must remove the plug from the EXact2 main board.

  • Page 13: Menu 3.2 - Selecting Language

    Operation, access codes and selection of 3005167-2022-02-02 language Cable requirements The service panel cable can be ordered from EXHAUSTO (product number: HMI- SERVICEC). Menu 3.2 - Selecting language 3 Settings 3.2 General Main menu Operating mode > Unit > Date and time >...

  • Page 14: Menu 3.2 - Reload Database

    Operation, access codes and selection of 3005167-2022-02-02 language Note This cannot be undone and the VEX/CX restarts. 3.2 General Date and time > Language > English Reset settings > Reload database > Menu 3.2 - Reload database Selecting "Reset settings" resets the user settings. See the menu guide for details of which menus are affected.

  • Page 15: Menu 3.7 - Backup/Restore

    Operation, access codes and selection of 3005167-2022-02-02 language Menu 3.7 - Backup/restore It is recommended that a backup copy of the VEX/CX settings is made and saved in a secure location. See the individual backup guidelines in the diagram: Backup via the HMI panel ●...

  • Page 16: Starting Up The Unit For Operation

    Starting up the unit for operation 3005167-2022-02-02 3. Starting up the unit for operation The Modbus connectors must not be connected or removed while the units are powered up. Both Modbus units must be switched off before making changes, otherwise the units may be damaged. During commissioning, it may be necessary to work with the control system boxes open.

  • Page 17: Start Configuration

    Starting up the unit for operation 3005167-2022-02-02 Start configuration Step Action Check that the correct configuration for the VEX/CX has been se- lected at the factory via menu 3.3. Check that all accessories have been configured in menu 3.4 If the CO sensor has been mounted, check in menu 3.1.2.1 "CO compensation", whether CO compensation has been activated.

  • Page 18: Menu 3.4 - Accessories

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.4 - Accessories 3.4 Accessories Line in menu 3.4 Factory-set and Remarks: Ice-detect. Pressure De-icing method should not be Heating coil > MHCE Cooling unit > None changed. Power step HCE > Filter detect.

  • Page 19: Menu 3.4 Connecting Heating And Cooling Units

    Starting up the unit for operation 3005167-2022-02-02 Line in menu 3.4 Factory-set and Remarks: should not be changed. Activating PIR sensor. Op- tions: ● Both (Both MIOPIR and PIRB connected) ● PIR2 (PIRB connected) ● PIR1 (MIOPIR connected) ● None When the sensor(s) is/are acti- vated by movement in the room, the VEX will be overrid-...

  • Page 20: Menu 3.5 Bms

    Starting up the unit for operation 3005167-2022-02-02 Heating coil - Cooling unit Menu 3.5 BMS Menu 3.5 - BMS 3.5 BMS Line in Menu 3.5 Comments BMS > None Configuration > Activating override control system BMS Op- tions: ● None ●...

  • Page 21: Menu 1 - Selecting Operating Mode

    HMI panel or the Web server Timer The unit is controlled automatically via a fixed weekly plan Note for commis- EXHAUSTO recommends that the operating mode be set to Manual during com- sioning missioning and changed to Timer operation when complete. 21/108...

  • Page 22: Menu 3.1.1 - Operating Settings - Air Regulation

    Starting up the unit for operation 3005167-2022-02-02 Note for manual When the unit is operating in Manual indoor climate level, the values set for the temperature setpoint (Temp. setpoint) and Air setpoint are shown immediately in the user menu. 3.1.1.1.4 Manual Air setpoint >...
  • Page 23 Starting up the unit for operation 3005167-2022-02-02 Method Meth- Description The following parameters Menu are set (1-8) Manual con- Constant speed ● Balance 3.1.1 Operating settings trol IAQ. levels > Manual control of fan speed Temp. reg. > Supply air Air reg.
  • Page 24 Starting up the unit for operation 3005167-2022-02-02 Method Meth- Description The following parameters Menu are set (1-8) Constant Constant pressure-regulated ● Supply airflow values 3.1.1.4 Constant pressure pressure reg- supply air with fixed extract for maximum and min- Supply air: ulation of air setting imum ventilation...

  • Page 25: Menu 3.1.1 - Operating Settings Balance

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1 - Operating settings Balance Definition Balance is the required ratio between the supply and extract airflows. The balance can only be maintained within certain operating ranges, limited by factors such as: ●...

  • Page 26: Menu 3.1.1.5 Regulators

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1.5 Regulators 3.1.1.5 Regulators Room temperature > Supply air temp. > Supply airflow > Extract airflow > Supply pressure > Extract pressure > Heat retention > Kp and Ti settings should only be changed by persons trained in commissioning ventilation systems.

  • Page 27: Menu 3.1.1.1.X - Absolute / Relative Temperature

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1.1.x - Absolute / Relative temperature Definition Used to select supply air or room temperature in relation to either absolute or rela- tive temperature. Absolute - Specify start temperature for heating coil or cooling unit. Relative - Permitted temperature changes relative to the heating coil or cooling unit start temperature.

  • Page 28: Menu 3.1.1.1.X - Cooling Absolute Start

    Starting up the unit for operation 3005167-2022-02-02 Example If the required room temperature is 21°C, and Heating Rel. start in the indoor air quality level menu is set to -3 K, the heating coil will begin to operate on a cold day when the temperature falls below 21°C - 3 K = 18°C.
  • Page 29 Starting up the unit for operation 3005167-2022-02-02 Limits, supply air temperature Max. and Min. may never be set closer to each other than 1K. If the following temperature will be is selected controlled by... supply air regula- supply air temperature Supply air temperature will never tion be higher than "Maximum"...

  • Page 30: Menu 3.1.1.1.X - Supply Air Regulation, Absolute

    Starting up the unit for operation 3005167-2022-02-02 Max. and Min. may never be set closer to each other than 1K. the following will be adjusted..Supply air temp. maximum is The room temp. maximum is automatically re- set lower than the room duced to the same value as the supply air temp.

  • Page 31: Menu 3.1.1.1.X - Room Temperature Regulation, Absolute

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1.1.x - Room temperature regulation, absolute 3.1.1.1.x xxxxxxx Air setpoint > °c Air setpoint,cool Temp. setpoint > 21,0 Abs. / Rel. > Absolute Cool rel. start > °c Cool abs. start > 26,0 Heat rel.

  • Page 32: Menu 3.1.1.1.X - Supply Air Regulation, Relative

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1.1.x - Supply air regulation, relative 3.1.1.1.x xxxxxxx Air setpoint > Air setpoint,cool > Temp. setpoint > 21,0 °c Abs. / Rel. > Relativ Cool rel. start > Cool abs. start > Heat rel.
  • Page 33 Starting up the unit for operation 3005167-2022-02-02 Example 2: Minimum and Maximum supply air temp. limit Cooling rel. start and Heating rel. start: 33/108...

  • Page 34: Menu 3.1.1.1.X - Room Temperature Regulation, Relative

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.1.1.x - Room temperature regulation, relative 3.1.1.1.x xxxxxxx Air setpoint > Air setpoint,cool > Temp. setpoint > 21,0 °c Abs. / Rel. > Relativ Cool rel. start > Cool abs. start > Heat rel.

  • Page 35: Menu 3.1.1 - Operation Settings - Temperature Regulation

    Starting up the unit for operation 3005167-2022-02-02 Example 2: Minimum and Maximum room temp. limit Cooling rel. start and Heating rel. start: Menu 3.1.1 - Operation settings - Temperature regulation Select one of two temperature regulation methods: ● Supply air temperature regulation ●...

  • Page 36: Compensation

    Starting up the unit for operation 3005167-2022-02-02 ● Modulating heating coil(s). ● Modulating rotor speed ● Any external cooling unit and cooling recovery Select Select one of the following: ● Supply air regulation - Typically used when the unit serves several rooms with different loads (sunlight, people, machines).

  • Page 37: Menu 3.1.2.1 - Co2 Compensation

    Starting up the unit for operation 3005167-2022-02-02 Note ● All compensation options can be connected and active at the same time, and may influence the control airflow ● CO and humidity compensation cannot be activated if air regulation method 8 is selected. Autostart with timer If the weekly schedule is at OFF and either the CO or the humidity level exceeds...

  • Page 38: Menu 3.1.2.2 - Humidity Compensation Of Airflow

    Starting up the unit for operation 3005167-2022-02-02 Menu 3.1.2.2 - Humidity compensation of airflow Requirements A humidity sensor (RHB, MIO-RH, BMS) must be fitted in order to be able to se- lect humidity compensation of the airflow. The sensor must be installed in the room in which you wish to make compensation, such as a bathroom.

  • Page 39: Menu 3.1.2.4 - Outdoor Compensation Of Airflow

    Starting up the unit for operation 3005167-2022-02-02 Example Supply air temperature is Airflow... Lower than Minimum Equivalent to Minimum (or lowest) airflow Between Minimum and Start increases gradually between mini- mum airflow and the set airflow Greater than Start Equivalent to set airflow ●...

  • Page 40: Menu 3.1.3 - Temperature Compensation

    Starting up the unit for operation 3005167-2022-02-02 Outdoor air temperature is Airflow... Lower than Minimum Equivalent to Minimum airflow Between Minimum and Start increases gradually between mini- mum airflow and the set airflow Greater than Start Equivalent to set airflow Menu 3.1.3 - Temperature compensation Outdoor air temperature compensation (menu 3.1.2.1) Function...

  • Page 41: Summertime Compensation (Menu 3.1.2.2)

    Starting up the unit for operation 3005167-2022-02-02 Summertime compensation (menu 3.1.2.2) Function The room temperature can be raised if outdoor air temperatures are high. Summertime compensation is active only if room temperature regulation is activa- ted for the indoor air quality level in Menu 3.1.1 (Operation settings -> Temp. reg. - >...

  • Page 42: Menu 3.1.4 + Menu 8.1 - Filter (Monitoring With Hour Counter)

    Starting up the unit for operation 3005167-2022-02-02 Current pressure The current pressure drop across the outdoor air and extract air filters is dis- played. Warning Set the supply air and extract air soiled-filter warning level here. Alarm Set the outdoor air and extract air replace-filter alarm level here. Menu 8.1 The same settings that can be configured in Menu 3.1.4 can be configured here.
  • Page 43 Starting up the unit for operation 3005167-2022-02-02 ● Outdoor air temperature must be lower than the room temperature ● Prior to initiating night-time cooling, there must not have been any heating re- quirement within a time interval defined in the night-time cooling menu ●...
  • Page 44 Starting up the unit for operation 3005167-2022-02-02 3.1.5 Night-time cooling 3.1.5.9 Permit night-time cooling Active period > Summer Comfort > Set point > 18°C Standby > Min. supply temp. > 10°C Economy > ΔT max. > ΔT min. > Start time > 00:00 Stop time >...

  • Page 45: Menu 3.1.6 - Cold Recovery

    Starting up the unit for operation 3005167-2022-02-02 *The extract air temperature is always used, regardless of whether a room tempera- ture sensor is installed for the system. Menu 3.1.5.9 - Per- mit night-time cool- is set to and the indoor air quality is activated level is Comfort/Standby/...

  • Page 46: Room Temperature Limits

    Starting up the unit for operation 3005167-2022-02-02 Supply air tempera- ture limits Setting Go to menu Lowest permitted supply air tempera- 3.1.8 Range: 10.0℃... ture 25.0°C Highest permitted supply air tempera- Range: 30.0℃... ture 40.0°C The settings above must only be changed if special circumstances require this.

  • Page 47: Menu 5 - Time And Weekly Plan

    Starting up the unit for operation 3005167-2022-02-02 Menu 5 - Time and weekly plan Menu 5.1 - Date and time This menu is used to set the current date, day and time. Menu 5.2 - Weekly plan Plan type When "Timer" operation has been selected in Menu 1, the weekly plan must be configured.

  • Page 48: Menu 7 - Safety Functions

    Starting up the unit for operation 3005167-2022-02-02 Program example 5.2.2.1 Weekday 1 IAQ. level > Standby 1 Time of day > 06:00 2 IAQ. level > Comfort 2 Time of day > 07:30 3 IAQ. level > Economy 3 Time of day > 17:30 4 IAQ.

  • Page 49: Menu 7.2 - Frost Protection Of Hcw

    Starting up the unit for operation 3005167-2022-02-02 The inputs allow the connection of: ● Smoke detectors ● Fire thermostats (e.g. BT40, BT50 or BT70) ● BMS ● Fire control system If an input is not used, a jumper must be used (see Electrical Installation Guide) Menu 7.2 - Frost protection of HCW Setting of frost pro- tection...
  • Page 50 Starting up the unit for operation 3005167-2022-02-02 Stop temperature If the return water tem- and total Then perature does the fol- number of lowing within a five-mi- restarts nute period Rises above the constant > 0 Airflow is increased again to the nor- heating temperature mal operating level Remains below the con-...

  • Page 51: Operation

    Operation 3005167-2022-02-02 4. Operation Menu 2 - Operating readings General All of the operating parameters can be read in Menu 2. _ _ _ is shown in the menu if a given unit is not fitted. Menu 2.1 - Air temperatures 2 Operating readings 2.1 Air temperature 2.1.1 Setp.

  • Page 52: Menu 2.1.1 - Set Points For Regulators

    Operation 3005167-2022-02-02 Example VEX200 + Chiller Diagrams See appendix 1 for VEX200 diagrams. Menu 2.1.1 - Set points for regulators This menu shows set points for: 2.1.1 Setp. regulators ● Room temperature regulator Room Heat recovery 10,0 ● Heat recovery regulator 10,0 Cooling unit 10,0...

  • Page 53: Menu 2.4 - Temperature Regulating Units

    Operation 3005167-2022-02-02 Menu 2.4 - Temperature regulating units The menu shows the current: 2.4 Temp. reg. enheder ● heat recovery Varmegenv. Eftervarmefl. ● Output of heating coil (if installed) VP enhed Køleenhed ● Output of heat pump unit (if installed) Kølegenvinding ●...

  • Page 54: Menu 2.7 - Ch Cooling Unit

    Operation 3005167-2022-02-02 Menu 2.7 - CH cooling unit The menu shows: 2.7 CH cooling unit ● pressure gas pressure Comp. gas press. 0.00 Suc. gas press. 0.00 ● suction gas pressure Comp. gas press. 0.00 °c Feed temp. 0.00 °c ●...

  • Page 55: Menu 2.12 - Hour Meters

    Operation 3005167-2022-02-02 Menu 2.12 - Hour meters The menu shows the hour meters for fan motors and rotor motor. 2.11 Timers Supply air motor 266hr Extract air motor 1256hr Rotor 214hr Menu 2.13 - CO2/RH sensors (if mounted) The menu shows: 2.12 CO2/RH sensors ●...

  • Page 56: Menu 8 - Service

    Operation 3005167-2022-02-02 Menu 8 - Service Do not open the service doors before the supply voltage has been disconnec- ted at the isolation switch. The isolation switch is positioned on the left side of the connection box on top of the unit. Weekly plan It is important to set ventilation to OFF when the weekly plan is active:...

  • Page 57: Auxiliary Service Panel

    Operation 3005167-2022-02-02 If BMS or Web server controls are used, they could over- BMS unit or Web ride the OFF function and the VEX may start up irregu- server larly. To disconnect the BMS or WEB server connection, you must remove the plug from the connection board. Refer to the section on the terminal board in the Electri- cal Installation Guide.

  • Page 58: Menu 8.2 - Vdi 6022

    Operation 3005167-2022-02-02 Cable requirements The service panel cable can be ordered from EXHAUSTO (product number: HMI- SERVICEC). Menu 8.2 - VDI 6022 Explanation VDI 6022 is a German hygiene standard. Menu 8.2 VDI 6022 Light > Filter pressure: Extract air filter...

  • Page 59: Menu 8.3.2 Recovery

    Operation 3005167-2022-02-02 Menu 8.3.2 Recovery If there are no current faults for the rotor motor ("Fault on unit" shown as "No"), 8.3.2 Recovery forced start may be activated. Rotor motor Rotation guard Error on unit Rotation control If the rotor is not running: check ●...

  • Page 60: Menu 8.3.5 Dampers And Relays

    Operation 3005167-2022-02-02 Menu 8.3.5 Dampers and relays The following dampers may be forced open or closed via the menu: 8.3.5 Dampers and relays ● LSF (closing damper, outdoor air) LSF > LSA > ● LSA (closing damper, exhaust air) RGS/AUX OUT > Alarm relay >...

  • Page 61: Alarms

    Alarms 3005167-2022-02-02 5. Alarms 5.1 Alarms and info (Menu 4) Alarms are shown in the event of unit faults or irregular operation ● Check the Current list (Menu 4) for alarm messages and refer to the list of alarms given at the end of these instructions. List of alarms 4 Alarm and info 4.5 Current list...
  • Page 62 Alarms 3005167-2022-02-02 Alarm code If an alarm has been generated, an alarm code is shown in the display in the for- mat XXYYZ, where . XX = unit YY = fault code Z = category of alarm. See category table in this section. 16 alarms There can be up to 16 alarms on the "Current list".

  • Page 63: List Of Alarms

    Alarms 3005167-2022-02-02 5.4 List of alarms Main Control VEX/CX Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 00 01 Control is powered Indicates when control is powered 00 02 Unknown reboot of ●...
  • Page 64 Alarms 3005167-2022-02-02 Frequency converter 1 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 01 01 One or more phases ● Check the cable between frequency converter 1 and motor between frequency converter and motor is/are short-circuited to...
  • Page 65 Alarms 3005167-2022-02-02 Frequency converter 1 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 01 15 Frequency converter Fault on frequency converter 1 hardware fault 01 16 Frequency converter ●...
  • Page 66 Alarms 3005167-2022-02-02 Frequency converter 2 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 02 01 One or more phases ● Check the cable between frequency converter 2 and motor between frequency converter and motor is/are short-circuited to...
  • Page 67 Alarms 3005167-2022-02-02 Frequency converter 2 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 02 15 Frequency converter Fault on frequency converter 2. hardware fault 02 16 Frequency converter ● Upgrade software in frequency converter 2. software version out of date Rotor control...
  • Page 68 Alarms 3005167-2022-02-02 Pressure transmitter 1 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 04 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to pressure act)/main board (EXact2) and MPT1.
  • Page 69 Alarms 3005167-2022-02-02 Pressure transmitter 3 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 06 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to pressure act)/main board (EXact2) and MPT3.
  • Page 70 Alarms 3005167-2022-02-02 Pressure transmitter 5 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 08 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to pressure act)/main board (EXact2) and MPT5.
  • Page 71 Alarms 3005167-2022-02-02 Pressure transmitter 7 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 10 01 No modbus communi- ● Check the cable between the connection board and MPT7 cation to pressure ●...
  • Page 72 Alarms 3005167-2022-02-02 Temperature sensor Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy TE11: TE11: ● Check the sensor's resistance complies with the actual tem- Extract air duct temper- perature. See temperature resistance table appendix 2 ature sensor discon- ●...
  • Page 73 Alarms 3005167-2022-02-02 Temperature sensor Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy TE-RPT: TE-RPT: ● Check the sensor's resistance complies with the actual tem- Return water pipe tem- perature. See temperature resistance table appendix 2 perature sensor on wa- ●...
  • Page 74 Alarms 3005167-2022-02-02 Fire thermostats Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 12 01 BT40/50, FIRE: BT40/50, FIRE: In event of Fire: Follow the building emergency Triggered fire alarm procedure has stopped VEX/CX Fire thermostat triggered when there is no fire:...
  • Page 75 Alarms 3005167-2022-02-02 HC Alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 14 01 Thermal fuse TSA70 HCE: activated Info is reset when the temperature falls below 70℃ 14 02 Thermal fuse TSA70 HCE:...
  • Page 76 Alarms 3005167-2022-02-02 HC Alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 14 10 Return water temp. too HCW: low. Frost protection ● Check that the hot water supply to the heating coil is function- activated.
  • Page 77 Alarms 3005167-2022-02-02 HC Alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 14 14 Could not increase re- HCW: turn water temp. within ● Check that the hot water supply to the heating coil is function- five minutes after frost ing.
  • Page 78 Alarms 3005167-2022-02-02 HC Sensor Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 15 01 Supply air duct temper- ● Check the sensor's resistance complies with the actual tem- ature sensor discon- perature.
  • Page 79 Alarms 3005167-2022-02-02 HC Controller Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 16 01 MHCW: Module config- Check the jumper in the CN6 connector on the heat control circuit ured incorrectly.
  • Page 80 Alarms 3005167-2022-02-02 Airflow/pressure Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 20 01 Airflow/pressure in ex- The unit provides airflow that is 25% above the setpoint. tract air duct airflow too ●...
  • Page 81 Alarms 3005167-2022-02-02 Airflow/pressure Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 20 12 Cooling cannot be re- The required air balance between supply air and extract air is still leased because sup- higher than the permitted limit of 1.15:1 after 30 minutes.
  • Page 82 Alarms 3005167-2022-02-02 Temperature sensor MIO-TS Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 22 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to MIO-TS mod- act)/main board (EXact2) and MIO module.
  • Page 83 Alarms 3005167-2022-02-02 Motion sensor PIR Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 24 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to PIR module act)/main board (EXact2) and PIR module.
  • Page 84 Alarms 3005167-2022-02-02 Cooling unit Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 25 01 Cooling unit stopped ● Check the low-pressure switch. The low-pressure switch cuts because of low evapo- out at 0.69 bar and re-engages at 2.21 bar.
  • Page 85 Alarms 3005167-2022-02-02 Cooling unit Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 25 08 Outdoor air duct tem- ● Check the sensor's resistance complies with the actual tem- perature sensor short- perature.
  • Page 86 Alarms 3005167-2022-02-02 External cooling unit (MXCU) control Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 28 01 Module configured in- ● Check jumper in CN6 connector on cooling control circuit correctly.
  • Page 87 Alarms 3005167-2022-02-02 MCCW Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 30 01 Supply air duct temper- ● Check the sensor's resistance complies with the actual tem- ature sensor discon- perature.
  • Page 88 Modbus Status Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 34 01 SendModbusDataRe- Contact EXHAUSTO A/S ceive fail 34 02 SendModbusDataSend Contact EXHAUSTO A/S fail 34 03 SendModbusDataCon- Contact EXHAUSTO A/S...
  • Page 89 Alarms 3005167-2022-02-02 External control Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 35 01 No modbus communi- ● Check the modbus cable between the connection board (EX- cation to the MIO- act)/main board (EXact2) and MIO module.
  • Page 90 Alarms 3005167-2022-02-02 EC Controller 1 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 36 02 The supply voltage to ● Check for low voltage to EC controller 1 the EC controller is too 36 03 The supply voltage to...
  • Page 91 Alarms 3005167-2022-02-02 EC Controller 2 Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 37 02 The supply voltage to ● Check for low voltage to EC controller 2 the EC controller is too 37 03 The supply voltage to...
  • Page 92 Alarms 3005167-2022-02-02 Configuration Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 40 01 Type has not been ● Configure the VEX/CX in menu 3.3 configured 40 02 VEX size has not been ●...
  • Page 93 43 07 Suction gas pressure ● Check connection between sensor and cooling control, sensor has short- ● Contact EXHAUSTO service. circuited. 43 08 Suction gas pressure ● Check connection between sensor and cooling control, sensor has been inter- ●...
  • Page 94 ● Disconnect the supply voltage to the cooling unit for 1 minute via the isolation switch on the cooling unit. ● Then cancel the alarm via the HMI panel. 43 15 Unknown configura- Chiller size has not been configured. Contact EXHAUSTO service. tion. Cooling status Troubleshooting Alarm description (See appendix 1: "Simplified diagrams"...
  • Page 95 Alarms 3005167-2022-02-02 MXHP Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 45 01 Supply air duct temper- ● Check the sensor's resistance complies with the actual tem- ature sensor discon- perature.
  • Page 96 Alarms 3005167-2022-02-02 MCOCW Alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 47 05 External pump or DX A general alarm has been received from the external pump or DX unit has an active unit.
  • Page 97 Alarms 3005167-2022-02-02 MCOCW Alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 47 12 Return water temp. HCW: measured by external ● Check that the hot water supply to the heating coil is function- sensor becoming too ing.
  • Page 98 Alarms 3005167-2022-02-02 MCOCW Sensor Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 48 01 Supply air duct temper- ● Check the sensor's resistance complies with the actual tem- ature sensor discon- perature.
  • Page 99 Alarms 3005167-2022-02-02 MCOCW Control Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the positioning of dampers, sensors, air directions, etc.) xx yy 49 01 Module configured in- ● Check the jumper in the CN6 connector on the MCOCW mod- correctly.
  • Page 100 Alarms 3005167-2022-02-02 ALC extract air damper alarm Troubleshooting Alarm description (See appendix 1: "Simplified diagrams" for the location of dampers, sen- sors, air directions, etc.) xx yy 52 01 MD1: No communica- ● Check Modbus cable to and from ALC damper for faulty tion to damper motor.

  • Page 101: Appendix 1 - Simplified Diagrams Simplified Diagrams

    Appendix 1 - Simplified diagrams 3005167-2022-02-02 Appendix 1 - Simplified diagrams Simplified diagrams Simplified diagrams for unit with chiller For units with an installed chiller, see the simplified diagrams at the rear of the chiller instructions. VEX240-250-260-270L fan placement 1 TE22 MPT2 T-Cool...

  • Page 102: Vex240-250-260-270L Fan Placement 2

    Appendix 1 - Simplified diagrams 3005167-2022-02-02 VEX240-250-260-270L fan placement 2 MPT1 TE11 TE12 1,1,A 1,2,A Extract air Exhaust air 2,2,A 2,1,A Supply air Outdoor air TE21 T-Cool T-heat TE22 RHX2M MPT2 VEX240-250-260-270R fan placement 2 MPT1 T-heat TE22 T-Cool TE21 2,2,A 2,1,A Outdoor air...

  • Page 103: Appendix 2 - Temperature Resistance Table

    Appendix 2 - Temperature resistance ta- 3005167-2022-02-02 Appendix 2 - Temperature resistance table Temperature resistance table DC95 Temperature Resistance Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] [°C] [Ohm] 324270 34464 5774 320139 32737 5545 299580 31107 5326 280471 29567 5116 262702 28113...
  • Page 104 Appendix 2 - Temperature resistance ta- 3005167-2022-02-02 Temperature Resistance Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] [°C] [Ohm] 1390 840,6 528,5 1346 815,7 514,0 1303 791,6 500,0 1261 768,4 486,4 1221 746,0 473,2 1183 724,3 460,5 1146 703,3 448,2 1110 683,1 436,3...
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This manual is also suitable for:

Exact2 vex250 seriesExact2 vex260 seriesExact2 vex270 seriesExact2 vex280 seriesExact2 vex200 series

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