Baxi MK SYSTEM Installation, User And Service Manual
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Baxi MK SYSTEM Installation, User And Service Manual

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Installation, User and Service Manual
Indoor unit
MK SYSTEM

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Summary of Contents for Baxi MK SYSTEM

  • Page 1 Installation, User and Service Manual Indoor unit MK SYSTEM...

  • Page 2: Table Of Contents

    Contents Contents Safety instructions ................. . . 5 Standard delivery .
  • Page 3 Contents Final instructions for commissioning ............. . . 26 Settings .
  • Page 4 Contents 11.3.3 Changing the temperature of an activity ........... . 65 11.4 Room temperature for a zone .

  • Page 5: Safety Instructions

    1 Safety instructions Safety instructions General safety instructions 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.

  • Page 6: Standard Delivery

    2 Standard delivery Keep the appliance accessible at all times to allow work to be performed. Never remove or cover the labels and data plates affixed to appliances. These must be legible throughout the entire lifetime of the appliance. Manufacturer's liabilities Our products are manufactured in compliance with the requirements of the various applicable directives.

  • Page 7: Symbols Used On The Indoor Unit

    Homologations 4.1.1 Directives Baxi hereby declares that the MK SYSTEM is a product principally designed for domestic use and compliant with the following directives and standards. It has been manufactured and put into circulation in accordance with the requirements of the European Directives.

  • Page 8: Factory Test

    Factory test Before each indoor unit leaves the factory, its electrical safety is tested. Technical data 4.2.1 Indoor unit technical specifications Tab.1 Unit MK SYSTEM Operating temperature °C 0 to 30 Storage temperature °C -25 to 60 Relative humidity (non condensing)

  • Page 9: Electrical Diagram

    4 Technical specifications Electrical diagram Fig.4 CB-05 1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18 19 20 21 22 23 24 25 26 27 28 29 CB-21 CH/DWH OUTPUT S-BUS GTW-30 GND - Config.

  • Page 10: Description Of The Product

    5 Description of the product Description Description Product power supply Main power supply Room Unit Room temperature sensor, Mago thermostat, on/off thermostat, modulating thermostat R-Bus (Room Unit) or OpenTherm thermostat SO+/SO- Energy counter SO+/SO- Energy meter S-BUS Cascade connection T System sensor Heating flow temperature sensor ZONE Zone - Pump - if a low loss header is used...

  • Page 11: Description Of The Connection Terminal Blocks

    5 Description of the product 14 EHC-14 main PCB: heat pump control system 15 Location of the optional PCB Description of the connection terminal blocks 5.3.1 Main PCB EHC-14 Fig.7 X1 230 V - 50 Hz power supply X2 Heating/domestic hot water 3-way directional valve connection X3 Micro-fit connector for external options Heating element - stage 1 T dhw 1...

  • Page 12: 0 - 24 V Signal Cable Terminal Block

    5 Description of the product 5.3.3 0 - 24 V signal cable terminal block Fig.9 16-17-18 Outdoor unit bus connection 19-20 Multifunctional output connection 21-22 OpenTherm boiler connection 23-24-25 LIN pump connection 26-27 PWM pump connection 16 17 18 19 20 21 22 23 24 25 26 27 28 29 28-29 Heating flow temperature sensor MOD BUS Config.

  • Page 13: Gtw-21 Pcb

    5 Description of the product Fig.12 X1 L-bus X2 L-bus X4 Modbus X5 Modbus X6 Connection to the building management system X7 Do not use 5.3.7 GTW-21 PCB Optional GTW-21 PCB for connecting to a building management system via BACnet Fig.13 X1 RJ45 connector - Connection to the building management system X2 L-bus...

  • Page 14: Description Of The User Interface

    5 Description of the product Description of the user interface 5.4.1 Description of the user interface Fig.15 1 Rotary knob to select a menu or setting 2 Validation button 3 Back button to return to the previous level or menu 4 Main menu button 5 Display screen 6 LED for status indication:...

  • Page 15: Installation

    6 Installation Icon Information Description of the icon DHW tank Temperature display for the domestic hot water Outdoor temperature Outdoor temperature display Installation Installation regulations Caution The appliance must be installed by a qualified professional in accordance with applicable local and national regulations. Positioning the indoor unit 6.2.1 Choosing the location of the indoor unit...

  • Page 16: Mounting On A Din Rail

    6 Installation 6.2.3 Mounting on a DIN rail Fig.19 The fitting bracket on the back of the casing can be used to mount the appliance directly on a DIN rail (35 x 7.5 mm). 1. Mount the rail. Please refer to the mounting instructions of the rail for more information.

  • Page 17: Connecting The Electrical Circuits

    6 Installation 6.3.2 Connecting the electrical circuits Fig.21 Connection with an outdoor unit AURIGA M/T-A 2 x 0,35 mm² Tout < 30 m CB-05 1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18 19 20 21 22 23 24 25 26 27 28 29 E X Y DIFF DISJ...

  • Page 18: Accessing The Indoor Unit Connectors

    6 Installation 6.3.3 Accessing the indoor unit connectors Fig.22 1. Unscrew the two screws on the front lower cover by a quarter turn. 2. Take off the front lower cover. The terminal blocks for the power cables and signal cables are now accessible.

  • Page 19: Installing And Connecting The Outdoor Temperature Sensor

    6 Installation 6.3.6 Installing and connecting the outdoor temperature sensor Fig.25 The connection of an outdoor temperature sensor is mandatory to ensure the correct operation of the appliance. 1. Choose a recommended location for the outdoor temperature sensor. 2. Fit the two wall plugs (diameter 6 mm) delivered with the outdoor temperature sensor.

  • Page 20: Fitting The Heating Flow Temperature Sensor

    6 Installation 1. Use a cable with a minimum cross section of 2 x 0.35 mm and a maximum length of 30 metres. Fig.28 2. Connect the outdoor temperature sensor to the Tout input on the X28 connector for the EHC-14 central unit PCB on the indoor unit. 6.3.7 Fitting the heating flow temperature sensor Fig.29...

  • Page 21: Connecting A Heating Element

    6 Installation 6.3.9 Connecting a heating element Fig.30 1. Connect stage 1 of the heating element 11-12-13 to the 230 V terminal block. 2. Connect stage 2 of the heating element 14-15 to the 230 V terminal block. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 See also Electrical diagram, page 9 Configuring the backup, page 29...

  • Page 22: Connecting An Internal Option Pcb

    6 Installation Connecting a backup boiler controlled via a dry contact Fig.33 1. Connect the backup boiler pump to 11-12-13 on the 230 V terminal block. 2. Connect the dry contact ON/OFF to 14-15 on the 230 V terminal block. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 This dry contact will control the activation and deactivation of the backup boiler.

  • Page 23: Connecting The External Options

    6 Installation 6.3.12 Connecting the external options Fig.36 The external options are connected to the CB-21 external options connection PCB of the indoor unit : 1. Recover the factory-connected L-BUS bus terminator, on the terminal block X2 on the CB-21 PCB. 2.

  • Page 24: Checking The Electrical Connections

    7 Commissioning 6.3.15 Checking the electrical connections 1. Check the mains electricity connection to the following components: Outdoor unit Indoor unit Heating element or backup boiler depending on the appliance model 2. If installing with a backup boiler, check the connection between the backup boiler and the indoor unit: backup boiler pump control and heating demand or burner start-up control.

  • Page 25: Commissioning Procedure With Smartphone

    The indoor unit is factory fitted with the BLE Smart Antenna PCB. The GTW-35 service tool is connected to the indoor unit. Fig.39 1. Download the Baxi START application on Google Play or on the App Store. ® 2. Activate Bluetooth in the smartphone settings.

  • Page 26: Cn1 And Cn2 Parameters

    8 Settings CN1 and CN2 parameters Fig.41 The CN1 and CN2 parameters are used to configure the heat pump based on the output of the installed outdoor unit. Only the CN1 and CN2 values shown on the data plate are valid. serial number IP21 220-230V 50/60Hz 15W;...

  • Page 27: Searching For A Parameter Or A Measured Value

    8 Settings To access the installer level: 1. Select the icon. 2. Enter the code 0012. The Installer level is activated . After modifying the desired settings, exit the Installer level. 3. To exit the Installer level, select the icon, then Confirm changes. If no action is taken for 30 minutes, the system will automatically exit the Installer level.

  • Page 28: Configuring The Heating Circuit

    8 Settings 4. With the Custom notification notification type, set the number of operating hours before a maintenance message is sent: Parameter Description Service hours (AP009) Compressor operating hours before a maintenance message is sent Service hours mains (AP011) Operating hours switched on before a maintenance message is sent Configuring the heating circuit 8.5.1 Setting the circuit function...

  • Page 29: Configuring Underfloor Cooling Or A Convection Fan

    8 Settings 8.5.3 Configuring underfloor cooling or a convection fan Cooling mode is used to lower the temperature in the selected zone to below the outdoor temperature. Cooling of the zone is only possible if it is equipped with underfloor heating (parameter Zone Function (CP020) set to Mixing Circuit or convection fans (parameter Zone Function (CP020) set to Fan Convector This function is only available when the Zone Function parameter (CP020)

  • Page 30: Configuring The Backup Boiler Parameters

    8 Settings 1. Configure the following parameters: Tab.10 Access path Parameter Description Adjustment required Backup type Heat pump backup type The adjustment depends on the type HP029 of backup used: > Heat Pump> 23.5 1 Electrical Stage Backup 2 Electrical Stages Boiler Backup Installation manual for the backup used See also...

  • Page 31: Drying The Screed

    8 Settings 1. Configure the heat pump parameters. Tab.11 Access Parameter Description Adjustment required Bivalent temperature Bivalent temperature 5 °C HP000 Air Src Heat pump > 23.5 Parameters, counters, signals Hybrid mode Hybrid mode selection to Set according to the optimisa­ >...
  • Page 32 8 Settings Fig.44 Example of screed drying Stage 1 programming in 3 stages. Stage 2 °C Stage 3 1. Configure the screed drying parameters for stage 1: 00:00 10 9 8 6 5 4 3 2 1 Access path Parameter Description Adjustment required Screed drying time...

  • Page 33: Configuring A Room Thermostat

    8 Settings Signals/Counters Description Screed end time The projected end date and time of the screed drying procedure ZM020 Screed dry remaining The remaining duration of screed drying in days ZC000 8.10 Configuring a room thermostat 8.10.1 Configuring an on/off or modulating thermostat The on/off or modulating thermostat is connected to the R-Bus terminals on the EHC-14 PCB or the optional SCB-17-B PCB.
  • Page 34 8 Settings 2. Configure the heat pump parameters. Tab.14 Access path Parameter Description Adjustment required Heat Pump > BL input setting Adjustment of the blocking input (BL1) Heating Cooling 23.5 Parameters, counters, AP001 signals > Advanced BL1 contact config BL1 input contact configuration Closed AP098 Closed: cooling active when BL contact is...

  • Page 35: Configuring The Anti-Legionella Function

    8 Settings Tab.18 Configuration D Value of the pa­ Value of the BL1 The multifunction Operating mode for If the OT contact is If the OT contact is rameter contact config pa­ input BL1 is: the heat pump open closed OTH LogicLev rameter contact...

  • Page 36: Configuring A Buffer Tank

    8 Settings 7. Choose the day and time to start the anti-legionella programme. Parameter Description Adjustment required Start day anti-leg Day to start the anti-legionella programme. Can be set from Monday to DP430 Only for weekly activation. Sunday Start time anti-leg Time to start the anti-legionella programme.

  • Page 37: Reducing The Noise Level Of The Outdoor Unit

    8 Settings Tab.21 Improving heating comfort Access path Parameter Description Adjustment required Max DHW duration Maximum duration of the domestic Reduce the maximum authorised > DHW tank > DP047 hot water production. duration for domestic hot water pro­ Parameters, counters, duction.

  • Page 38: Configuring Sources Of Energy

    8 Settings 2. Configure the following parameter: Parameter Description Adjustment required Multifunct output Configure the function of the multifunctional Configure the parameter based on the required HP188 output status information. Cooling mode Defrosting mode Silent Mode 8.16 Configuring sources of energy 8.16.1 Configuring the electrical energy consumption function In order for the energy metering to work, adjust the parameter: Value of...

  • Page 39: Supplying The Heat Pump With Photovoltaic Energy

    8 Settings The thermal energy from the backup boiler or heating element is factored in to provide the full tally of restored thermal energy. See also Connecting an electricity meter, page 23 8.16.2 Supplying the heat pump with photovoltaic energy When lower cost electrical energy, such as photovoltaic energy, is available, the heating circuit and domestic hot water tank can be overheated.

  • Page 40: Saving And Restoring Settings

    8 Settings 3. Turn on the electricity supply and switch on the heat pump. 4. Configure the heat pump input parameters. The BL input setting (AP001) parameter corresponds to the BL1 input. Access path Parameter Adjustment required Heat Pump> Parameters, counters, BL input setting Smart Grid ready 23.5...

  • Page 41: Resetting Or Re-Establishing The Parameters

    9 Parameters 8.17.3 Resetting or re-establishing the parameters Resetting the configuration numbers If you have replaced the PCB or made an error during setting, you must reset the configuration numbers CN1 and CN2. The system uses these numbers to identify the outdoor unit output and the type of backup present on the installation.
  • Page 42 9 Parameters Tab.29 > Settings Parameters Description of the parameters Factory setting EHC-14 BL input setting Blocking input setting (1: Full blocking, 2: Partial blocking, 3: User reset locking) Partial blocking AP001 Full blocking Partial blocking User reset locking Backup relieved Generator relieved Gen.&Backup relieved High, Low Tariff...
  • Page 43 9 Parameters Parameters Description of the parameters Factory setting EHC-14 BL2 contact config. BL2 input contact configuration Open AP099 Open Closed BL2 function BL2 input function selection Partial blocking AP100 Full blocking Partial blocking User reset locking Backup relieved Generator relieved Gen.&Backup relieved High, Low Tariff Photovoltaic HP Only...
  • Page 44 9 Parameters Parameters Description of the parameters Factory setting EHC-14 HP silent mode Heat pump silent mode level No silent mode HP058 No silent mode : normal operation Silent mode level 1 : level 1 sound reduction Silent mode level 2 : level 2 sound reduction, which is higher than level 1 Hybrid mode Hybrid mode selection to choose on what basis the hybrid system will optimise No Hybrid...
  • Page 45 9 Parameters Signals Description of the signals Status Appliance Current main status of the appliance. AM012 Sub status Appliance Current sub status of the appliance. AM014 System Flow Temp Flow temperature of appliance. in °C AM016 Water pressure Water pressure of the primary circuit. in bar AM019 3 way valve Status of the three way valve...

  • Page 46: Circa > Parameters, Counters, Signals

    9 Parameters Tab.31 > Counters Meters Description of the meters Service run hours Number of hours that the appliance has been producing energy since last service AC002 Hours since service Number of hours since the previous servicing of the appliance AC003 Starts since service Number of heat generator starts since the previous servicing.
  • Page 47 9 Parameters Parameters Description of the parameters Factory setting CIRCA Zone Function Functionality of the zone Mixing Circuit CP020 Disable Direct = radiators. Cooling not possible. Mixing Circuit = underfloor heating for the CIRCA and CIRCB . Cooling possible. Swimming pool. = not used. High Temperature = not used.
  • Page 48 9 Parameters Parameters Description of the parameters Factory setting CIRCA Temporary Room Temporary room setpoint per zone 20 °C Setp Can be set from 5 °C to 30 °C CP510 Zone, fire place Fire Place mode is active CP550 ZoneTimeProg Select Time Program of the zone selected by the user Schedule 1 CP570...

  • Page 49: Dhw Tank > Parameters, Counters, Signals

    9 Parameters Tab.33 > Signals Signals Description of the signals DHW tank temp bottom Domestic Hot Water tank temperature (bottom sensor) in °C DM001 DhwFlowTempSetpoint Flow temperature setpoint Domestic Hot Water in °C DM004 Error TAS DHW Error status of the anti-corrosion protection system of the domestic hot water DM007 tank Auto/Derog DHWstatus...
  • Page 50 9 Parameters Parameters Description of the parameters Factory setting Min CH before DHW Minimum heating duration between two periods of domestic hot 2 hours DP048 water production Can be set from 0 to 10 hours DHW management ECO mode; Use of the heat pump only, Comfort mode; Use of the HP only DP051 heat pump and backup energy sources...

  • Page 51: Outdoor Sensor Setup > Parameters, Counters, Signals

    9 Parameters Signals Description of the signals Auto/Derog DHWstatus Automatic/derogation status of Domestic Hot Water mode DM009 Scheduling Manual Temporary DHW activity Domestic Hot Water current activity DM019 Comfort Anti legionella DHW setpoint Domestic Hot Water temperature setpoint in °C DM029 DHW active Is the appliance currently in domestic hot water production mode?
  • Page 52 9 Parameters Parameters Description of the parameters Factory setting CIRCA Frost min out temp Outdoor temperature below which the antifreeze protection is activated: 3 °C AP080 Can be set from -30 to 20°C set to -30 °C = function deactivated Outdoor sens source Type of outdoor sensor connection to be used Auto...

  • Page 53: Installation Setup > Scb-01

    9 Parameters 9.1.5 > > Installation Setup > SCB-01 Tab.40 > Settings Parameters Description of the parameters Factory setting SCB-01 Status relay func. 1 Status relay function 1 No Action EP018 No Action Alarm Alarm Inverted Generator on Generator off Reserved Reserved Service request...

  • Page 54: Description Of The Parameters

    9 Parameters Description of the parameters 9.2.1 Running the back-up in heating mode Start-up conditions for the backup The backups are authorised to start up normally except in cases of power cut-off or limitation linked to bivalency (Bivalent temperature - HP000). If the heat pump should also be limited, the backups are nevertheless authorised to operate to guarantee heating comfort.

  • Page 55: Running The Back-Up In Domestic Hot Water Mode

    9 Parameters 9.2.2 Running the back-up in domestic hot water mode Start-up conditions for the backup The start-up conditions for the backup for domestic hot water production depend on the BL input setting (AP001) and BL2 function (AP100) parameters for the blocking inputs BL1 and BL2 respectively. Operating description The behaviour of the backup boiler or the electric heating element in domestic hot water mode depends on the configuration of the DHW...

  • Page 56: Operation Of The Heating Curve

    9 Parameters Tab.42 Phase Description of the phase Operating description Domestic hot water production only When the system is switched on, if domestic hot water production is au­ thorised and the parameter DHW management (DP051) is configured to HP only, a domestic hot water production cycle is started up for a maxi­ mum duration that can be set and fixed by the Max DHW duration (DP047) parameter.
  • Page 57 9 Parameters 1 Current Flow temperature setpoint of zone CM070 4 Outdoor temperature CM210 2 Maximum Flow Temperature setpoint zone 5 Curve base temperature CP210 / CP220 = 20 °C CP000 = 55 °C 3 Heating curve temperature gradient of the zone CP230 Tab.43 Parameters...

  • Page 58: 10 Examples Of Installation And Connection With An Auriga M/T-A Outdoor Unit

    10 Examples of installation and connection with an AURIGA M/T-A outdoor unit Fig.50 Heating curve with curve base CM070 °C CP210 CM210 °C With setting of the curve base temperature (CP210 / CP220) to 30 °C: an outdoor temperature CM210 of 0 °C will give a flow setpoint temperature for the circuit CM070 of 45 °C.

  • Page 59: Connecting And Configuring The Heat Pump

    10 Examples of installation and connection with an AURIGA M/T-A outdoor unit 10.1.2 Connecting and configuring the heat pump Fig.52 230V~50Hz 230V~50Hz MW-6070500-1 1 2 3 4 5 6 7 8 9 101112131415 16 17 18 19 20 2122 23 24 25 26 2728 29 CB-21 1 Outdoor temperature sensor 5 ON/OFF contact for the hydraulic backup...
  • Page 60 10 Examples of installation and connection with an AURIGA M/T-A outdoor unit 3. Configure the radiator circuit parameters (CIRCA). Tab.44 Access path Parameter Description Adjustment required CIRCA > MaxZoneTFlowSetpoi Maximum Flow Temperature setpoint 75 °C (factory setting) 21.7 Parameters, counters, zone Adjust the temperature as required.

  • Page 61: Installation With One Dhw Cylinder And One Low Loss Header

    10 Examples of installation and connection with an AURIGA M/T-A outdoor unit 10.2 Installation with one DHW cylinder and one low loss header 10.2.1 Hydraulic diagram Fig.53 230V~50Hz 230V~50Hz MW-6070499-2 1 Mago connected thermostat 5 Magnetic filter 2 GTW-30 communication PCB 6 Insulated hose kit 3 Buffer tank 7 Anti-freeze valves...

  • Page 62: Connecting And Configuring The Heat Pump

    10 Examples of installation and connection with an AURIGA M/T-A outdoor unit 10.2.2 Connecting and configuring the heat pump Fig.54 230V~50Hz 230V~50Hz MW-6070501-2 1 2 3 4 5 6 7 8 9 101112131415 16 17 18 19 20 2122 23 24 25 26 2728 29 CB-21 1 Outdoor temperature sensor 5 Heating circuit pump power supply...

  • Page 63: 11 Operation

    11 Operation 3. Configure the radiator circuit parameters (CIRCA). Tab.46 Access path Parameter Description Adjustment required CIRCA > MaxZoneTFlowSetpoi Maximum Flow Temperature setpoint 75 °C (factory setting) 21.7 Parameters, counters, zone Adjust the temperature as required. signals > Settings CP000 Zone Function Functionality of the zone Direct (factory setting)

  • Page 64: Personalising The Zones

    11 Operation 3. Perform the required settings: Menu Description Set Date and Time Setting the date and time Select Country and Language Select the country and language Setting the automatic change to daylight saving time. These changes will be carried out on the Daylight Saving Time last Sunday in March and October Installer Details...

  • Page 65: Changing The Name Of An Activity

    11 Operation Fig.56 Tab.49 Example: Start of the activity Activity Set point temperature °C 6:30 20 °C Morning 9:00 19 °C Away 17:00 20 °C Home 20:00 22 °C Evening 06:30 09:00 17:00 20:00 23:00 MW-1001144-2 23:00 16 °C Sleep 00:00 15°C Custom...

  • Page 66: Selecting The Operating Mode

    11 Operation 11.4.1 Selecting the operating mode 1. Select the icon for the affected zone, , for example. 2. Select Operating mode. 3. Select the desired operating mode. 11.4.2 Defining a constant room temperature Manual mode is used to define a constant temperature in a selected zone. 1.

  • Page 67: Changing The Room Temperature Temporarily

    11 Operation Fig.58 4. To modify the timer programme for the Cooling mode, select Time programs cooling. 14 : 23 Zo.. Zone setup: ... Cooling Schedule The programmed activities for Monday are displayed. Monday The last activity of the day remains active until the first activity of the 6:00 Comfort 20.0°C...

  • Page 68: Forcing Domestic Hot Water Production (Override)

    11 Operation 3. Select the timer programme to be activated. Information on the active timer programme is given in the upper part of the screen. Fig.59 4. To change the timer programming, select the programme you wish to change. 14 : 23 Zo...

  • Page 69: Forcing Cooling

    11 Operation 3. Select the desired value: Off to stop the heating/cooling function. On to switch the heating/cooling function on again. 11.6.2 Forcing cooling Your appliance will automatically switch to cooling mode when the outdoor temperature exceeds 22 °C (factory setting). However, you can force cooling mode at any time, regardless of the outdoor temperature.

  • Page 70: Starting And Stopping The Heat Pump

    12 Maintenance 11.8 Starting and stopping the heat pump 11.8.1 Starting the heat pump 1. Switch on the outdoor unit, the indoor unit and the backup (immersion heater or backup boiler depending on the model) simultaneously. Important The outdoor unit is powered via its circuit breaker. The indoor unit is powered via the circuit breaker and the ON/OFF button.

  • Page 71: Checking Operation Of The Appliance

    12 Maintenance Caution Only qualified professionals are authorised to carry out maintenance work on the heat pump and the heating system. Danger of electric shock Before any work, switch off the power supply to the heat pump and the backup boiler or the heating element, if present. Danger of electric shock Do not perform work when the red LED is lit.

  • Page 72: 13 Troubleshooting

    13 Troubleshooting Fig.60 2. Remove the battery located in back plate of the user interface by pushing it gently forwards. 3. Insert a new battery. Important Battery type: CR2032, 3V Do not use rechargeable batteries Do not discard used batteries in the dustbin. Take them to an appropriate collection place.

  • Page 73: Blocking Codes

    13 Troubleshooting 13.1.3 Blocking codes A blocking code signals an anomaly affecting the heating system. Several possibilities: The system automatically attempts to correct the error (for example in the event of a fault related to the flow rate). The error is still present and the system functions in defect mode (for example, in the event of a fault affecting the outdoor unit, then the backup electric heater or the backup boiler is started up).
  • Page 74 13 Troubleshooting Code Message Description H00.49 THp Flow Missing Heat pump flow temperature sensor was expected but not detected Check the wiring between the main PCB and the sensor. Check that the sensor has been fitted correctly. Check the Ohmic value of the sensor. Replace the sensor if necessary.
  • Page 75 13 Troubleshooting Code Message Description H06.07 BL CompLowPressure A low pressure anomaly has stopped the compressor Error code shown on the digital display of the outdoor unit: P0, HP The system's refrigerant level is too low. Add the appropriate quantity. In heating or DHW mode, the outdoor heat exchanger is dirty or clogged.
  • Page 76 13 Troubleshooting Code Message Description H06.28 Comm IDU - ODU Communication error between the indoor unit and outdoor unit Error code shown on the digital display of the outdoor unit: E2 The main PCB B and the main control PCB of the hydraulic module are not connec­ ted.
  • Page 77 13 Troubleshooting Code Message Description H06.37 Overheat protection The outdoor unit overheat protection is activated H06.38 ODU pressure The outdoor unit pressure is anomalous H06.39 ODU overcurrent Compressor overcurrent in the outdoor unit Error code shown on the digital display of the outdoor unit: P3 See possible causes and action list for code H06.24.
  • Page 78 13 Troubleshooting Code Message Description H06.64 HP inverter com Communication error between the outdoor main control unit and the inverter module of the heat pump Error code shown on the digital display of the outdoor unit: H1 If there is a power supply connected to the PCB and to the drive board. Check whether the PCB LED is on or off.

  • Page 79: Lockout Codes

    13 Troubleshooting Code Message Description H06.76 ODU return temp err Return temperature sensor is on error in the outdoor unit Error code shown on the digital display of the outdoor unit: Ed Check the sensor resistance The connector for the Tw_in sensor is loose. Reconnect it. The connector for the Tw_in sensor is wet or contains water.

  • Page 80: Displaying And Clearing The Error Memory

    13 Troubleshooting Tab.57 List of lockout codes Code Message Description E00.00 TFlow Open Flow temperature sensor is either removed or measures a temperature below range Poor sensor connection: Check the wiring between the PCB and the sensor Check that the sensor has been correctly fitted Sensor failure: Check the Ohmic value of the sensor Replace the sensor if necessary...

  • Page 81: 14 Decommissioning And Disposal

    14 Decommissioning and disposal 14 Decommissioning and disposal 14.1 Removing the indoor unit from the DIN rail Fig.61 1. Press the two clickers on both sides of the housing. 2. Pull the bottom of the appliance from the rail. MW-6070556-01 14.2 Decommissioning procedure 1.

  • Page 82: Name And Temperature Of The Activities

    15 Appendix 15.2 Name and temperature of the activities Tab.59 Name and temperature of the activities for heating Factory-set name Factory-set tempera­ Activities Name and temperature defined by the customer ture Activity 1 Sleep 16 °C Activity 2 Home 20 °C Activity 3 Away 6 °C...
  • Page 83 Original instructions - © Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing. Subject to alterations.
  • Page 84 36061 BASSANO DEL GRAPPA (VI) - ITALY Via Trozzetti, 20 Customer care: Tel +39 0424 517800 - Fax +39 0424 38089 www.baxi.it 7856310 - v02 - 21122023 7856310-001-02...

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