Viessmann VITOCAL 200-S Service Instructions For Contractors
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Viessmann VITOCAL 200-S Service Instructions For Contractors

Viessmann VITOCAL 200-S Service Instructions For Contractors

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VIESMANN
Service instructions
for contractors
Viessmann One Base
System configuration and diagnostics for heat pumps with Viessmann One Base
Vitocal 200-S/222-S/222-SI
Viessmann One Base
VITOCAL 200-S/222-S/222-SI
Please keep safe.
6199961 GB
7/2024

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  • Page 1 VIESMANN Service instructions for contractors Viessmann One Base System configuration and diagnostics for heat pumps with Viessmann One Base Vitocal 200-S/222-S/222-SI Viessmann One Base VITOCAL 200-S/222-S/222-SI Please keep safe. 6199961 GB 7/2024...

  • Page 2: Target Group

    Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note The system contains easily flammable This symbol warns against the risk refrigerant of safety group A2L accord-...

  • Page 3: Safety Instructions

    Safety instructions Safety instructions (cont.) Safety instructions for working on the system Working on the system Please note Electronic assemblies can be dam- Switch off the power supply to the sys- ■ aged by electrostatic discharge. tem, e.g. at a separate fuse or mains Before beginning work, touch isolator.

  • Page 4: Repair Work

    Replace faulty components only ■ Wear personal protective equip- ■ with genuine Viessmann spare ment when handling liquid and parts. gaseous refrigerant. Do not undertake any repairs on ■ Never breathe in refrigerant ■...
  • Page 5 For installation and replacements, use only Viessmann original parts or parts approved by Viessmann. Safety instructions for operating the system What to do if refrigerant escapes Danger...
  • Page 6 Safety instructions Safety instructions (cont.) What to do if the outdoor unit ices up Do not use mechanical items/aids for ■ the removal of ice. Please note Before using electrical heating applian- ■ A build-up of ice in the condensate ces, check the refrigerant circuit for pan and in the fan area of the out- leaks with a suitable measuring device.

  • Page 7: Table Of Contents

    Index Index 1. Information Symbols ....................18 2. Introduction Scope of functions ................. 19 System examples .................. 19 3. Function description CAN bus system ..................20 CAN bus subscriber ................20 ■ Commissioning the CAN bus subscribers in a system network ..21 ■...
  • Page 8 Index Index 2543.1 Smart Grid set value adjustment for room temperature, cool- ■ ing ....................... 47 2543.2 Smart Grid set value adjustment for DHW heating ....47 ■ 2543.3 Smart Grid set value adjustment for buffer cylinder in heating ■ mode ....................
  • Page 9 Index Index 875.0 Start time increased DHW hygiene .......... 55 ■ 875.1 Start time increased DHW hygiene .......... 55 ■ 876 Hygiene function weekday .............. 55 876.0 Weekday increased DHW hygiene ........... 55 ■ 1085 Hysteresis for cylinder heating ............56 1085.0 Start hysteresis, set cylinder temperature ......
  • Page 10 Index Index 1102.1 Heating circuit pump max. speed, heating/cooling circuit 1 ..65 ■ 1102.2 Heating circuit pump set speed, heating/cooling circuit 1 ..65 ■ 1103 Speed settings for heating circuit pump, heating/cooling circuit 2 65 1103.0 Heating circuit pump min. speed, heating/cooling circuit 2 ..65 ■...
  • Page 11 Index Index 2406 Constant set flow temperature, heating/cooling circuit 2 ....72 2406.0 Set flow temperature for cooling, heating/cooling circuit 2 ..72 ■ 2406.1 Set flow temperature, cooling, underfloor heating circuit, ■ heating/cooling circuit 2 ..............72 2406.2 Set flow temperature, cooling with fan convector, heating/ ■...
  • Page 12 Index Index 2424 Temperature offset, heating/cooling circuit 4 ........ 77 2424.0 Temperature offset, heating/cooling circuit 4 ......77 ■ 2426 Energy saving function, heating/cooling circuit 1 ......78 2426.0 Enable economy function, outside temperature, heating/cool- ■ ing circuit 1 ..................78 2426.1 Hysteresis, economy function, outside temperature, heating/ ■...
  • Page 13 Index Index 10. Parameter group for buffer 3070 Buffer cylinder set value operating mode ........87 cylinder with heating and 3070.0 Buffer target operation mode ..........87 ■ cooling 3106 Buffer temperature limits ............... 87 3106.0 Minimum limit ................87 ■...
  • Page 14 F.881 Safety shutdown, refrigerant circuit .......... 114 ■ F.906 Discrepancy between the outdoor and indoor unit ....115 ■ F.909 No information on Viessmann Energy Management (HEMS) ... 115 ■ F.910 Multiple main appliances recognised ........115 ■ F.914 Inverter temperature too high ........... 115 ■...
  • Page 15 Index Index F.940 Data from inverter 3 not available ..........120 ■ F.941 Data from inverter 4 not available ..........121 ■ F.942 Data from inverter 5 not available ..........121 ■ F.943 Data from inverter 6 not available ..........121 ■...
  • Page 16 Index Index F.1035 Communication fault, internal CAN bus ........138 ■ F.1045 Fault, external heat/cooling generator 1 ......... 139 ■ F.1050 Short circuit, temperature sensor, external heat/cooling gen- ■ erator 1 ....................139 F.1051 Lead break, temperature sensor, external heat/cooling gen- ■...
  • Page 17 Index Index (cont.) Status messages ................... 152 Information messages ................155 12. Appendix DIP switch settings for the ODUC refrigerant circuit controller ....158 Overview of subscriber numbers ............158 CAN bus cable ..................158 Terminator ...................159 ■ Temperature sensors ................159 Temperature sensors in the indoor unit ..........

  • Page 18: Information Symbols

    Information Symbols Symbols in these instructions Symbols on the heat pump Symbol Meaning Symbol Meaning Reference to other document containing Warning of flammable materials further information (ISO 7010 - W021) Observe the operating manual Step in a diagram: (ISO 7000 - 0790) The numbers correspond to the order in Observe the instructions for use/operating which the steps are carried out.

  • Page 19: Introduction Scope Of Functions

    Scope of functions These instructions contain the following information for air source heat pumps with indoor and outdoor unit and the Viessmann One Base control platform: ■ Control parameters for matching the heat pump to different requirements and operating conditions: See page 41 onwards.

  • Page 20: Function Description Can Bus System

    ■ System network: An external CAN bus system consisting of compati- ble appliances with Viessmann One Base is referred to as a system network, e.g. Vitocal 250-A and Vitocharge VX3. The advantages of a system net- work are, for example, shared use of a connectivity module and joint commissioning and operation via an app.

  • Page 21: Commissioning The Can Bus Subscribers In A System Network

    Further Viessmann appliance: Vitocharge VX3 as a slave inverter Commissioning the CAN bus subscribers in a system network In a system network, all Viessmann appliances with The Viessmann appliance on which commissioning ■ One Base are commissioned using the ViGuide app is started is automatically the main appliance.

  • Page 22: Determining The Flow Temperature With Weather Compensation

    Function description Heating/cooling (cont.) Max. number of heating/cooling circuits Heat pump type System without external buffer System with external buffer cylin- cylinder Indoor unit with 1 integral heating/ 1 heating/cooling circuit without 1 heating/cooling circuit without mix- cooling circuit mixer er and up to 3 heating/cooling cir- cuits with mixer Indoor unit with 2 integral heating/...
  • Page 23 Function description Heating/cooling (cont.) The set flow temperature determined by the heat pump Offset for flow temperature control unit can also be corrected and limited: ■ Offset for flow temperature In the following cases, the set flow temperature can be ■...

  • Page 24: Control Of The Flow Temperature For Indoor Units With 1 Integral Heating/Cooling Circuit

    Function description Heating/cooling (cont.) Control of the flow temperature for indoor units with 1 integral heating/cooling circuit Heating/cooling circuit 1 without mixer and without Heating/cooling circuits 2 to 4 with mixer and with external buffer cylinder external buffer cylinder The flow temperature of the heat pump is controlled by The flow temperature of the heat pump is controlled modulating the compressor at the integral flow temper- via the buffer temperature sensor.

  • Page 25: 4/3-Way Valve Position For Heating/Cooling Demand

    Function description Heating/cooling (cont.) For room heating, the max. flow temperature of heat- Note ■ ing/cooling circuit 2 must not be higher than the cur- If the above conditions cannot be met, it is not possible rent flow temperature of heating/cooling circuit 1. For to operate a heat pump with 2 integral heating/cooling room cooling, the flow temperature of heating/cooling circuits in this system.
  • Page 26 Function description Heating/cooling (cont.) Flow diagram, heating/cooling mode, heating/cooling circuit 1 Fig. 4 Air source heat pump Flow temperature sensor, heating/cooling cir- Heating/cooling circuit 1 cuit 2 Heating/cooling circuit 2 Heating circuit pump, heating/cooling circuit 2 Instantaneous heating water heater Integral buffer cylinder (not available with all heat pump types) Heating circuit pump, heating/cooling circuit 1...
  • Page 27 Function description Heating/cooling (cont.) Flow diagram for indoor units with 2 integral heating/cooling circuits: Heating/cooling mode for heating/ cooling circuit 2 Fig. 5 Air source heat pump Flow temperature sensor, heating/cooling cir- Heating/cooling circuit 1 cuit 2 Heating/cooling circuit 2 Heating circuit pump, heating/cooling circuit 2 Instantaneous heating water heater Integral buffer cylinder...
  • Page 28 Function description Heating/cooling (cont.) Flow diagram for indoor units with 2 integral heating/cooling circuits: Mixed mode for heating/cooling cir- cuit 1 and heating/cooling circuit 2 Fig. 6 Air source heat pump Flow temperature sensor, heating/cooling cir- Heating/cooling circuit 1 cuit 2 Heating/cooling circuit 2 Heating circuit pump, heating/cooling circuit 2 Instantaneous heating water heater...

  • Page 29: Starting And Stopping The Compressor When Heating/Cooling Is Required

    Function description Heating/cooling (cont.) Starting and stopping the compressor when heating/cooling is required The following criteria influence the start and stop Output integral threshold 150 K · behaviour of the compressor: Compressor ON ■ Start and stop hysteresis of 2 K at the following tem- Alternatively or additionally, depending on the sys- peratures: tem components and outside temperature:...

  • Page 30: Changeover Heating/Cooling

    Function description Heating/cooling (cont.) Parameters for the energy saving functions Energy saving func- Heating/cooling Heating/cooling Heating/cooling Heating/cooling cir- tion circuit 1 circuit 2 circuit 3 cuit 4 Heating limit, summer economy mode Enable Parameter 1395.0 Parameter 1396.0 Parameter 1397.0 Parameter 1398.0 ■...

  • Page 31: Auxiliary Functions

    Function description Heating/cooling (cont.) End heating mode: ■ Heating mode ends if the adjusted outside tempera- ture is greater than or equal to the summer economy mode temperature threshold (parameters 1395.1, 1396.1, 1397.1, 1398.1) plus 1 K. Heating mode ends if the adjusted outside tempera- ■...

  • Page 32: Dhw Heating

    Function description Heating/cooling (cont.) Temporarily adjusting the room temperature Operating instructions for the heat pump The "Extend time phase once" function is used to set the room temperature of the last active time phase for Defrosting standard room temperature or comfort room tempera- ture.
  • Page 33 Function description DHW heating (cont.) Flow diagram Fig. 9 Air source heat pump Flow temperature sensor, heating/cooling cir- Heating/cooling circuit 1 cuit 2 Indoor unit with 2 integral heating/cooling cir- Indoor unit with 2 integral heating/cooling cir- cuits: cuits: Heating/cooling circuit 2 Heating circuit pump, heating/cooling circuit 2 Instantaneous heating water heater Integral buffer cylinder...
  • Page 34 Function description DHW heating (cont.) Start and stop conditions for DHW heating Within the application limits of the heat pump, the booster heater is only switched on in addition to the ■ If the cylinder temperature has fallen below the set heat pump if required.
  • Page 35 Function description DHW heating (cont.) DHW heating in conjunction with other functions Temperature limits for efficient DHW heating One-off DHW heating Parameters 504.5 and 504.6 are used to specify a cyl- inder temperature range in which DHW heating takes The "one-off DHW heating" function can be used to place in an energy saving manner.

  • Page 36: Flow Rate Control With Hydro Autocontrol

    To ensure the minimum flow rate, heat pumps with pump, a minimum flow rate is required. Viessmann One Base are equipped with Hydro Auto- Control. Hydro AutoControl regulates the flow rate If the flow rate in the secondary circuit is too low, not...

  • Page 37: 4/3-Way Valve

    Function description Flow rate control with Hydro AutoControl (cont.) Flow temperature sensor, secondary circuit Indoor unit with 2 integral heating/cooling cir- 4/3-way valve cuits: Heating circuit pump, heating/cooling circuit 2 Positions: Integral buffer cylinder DHW heating Secondary pump Integral buffer cylinder For indoor unit with 2 integral heating/cooling cir- For indoor unit with 2 integral heating/cooling cuits, also heating circuit pump for heating/cool-...

  • Page 38: Minimum Flow Rates

    Function description Flow rate control with Hydro AutoControl (cont.) Overview of system components that receive a flow Position of 4/3-way valve Indoor unit with 1 integral heating/cooling Indoor unit with 2 integral circuit heating/cooling circuits 0 V to 0.5 V Secondary circuit (heating/cooling circuit 1 or Heating/cooling circuit 1 ≙...

  • Page 39: Adjusting Minimum Flow Rates To The System Hydraulics

    Function description Flow rate control with Hydro AutoControl (cont.) Adjusting minimum flow rates to the system hydraulics Note Heating/cooling circuit 2 The Hydro AutoControl function cannot prevent the Settings via the actuator test: ■ ≙ refrigerant circuit from cycling in the following cases: –...

  • Page 40: Emergency Mode

    Function description Emergency mode If the outdoor unit is not available, emergency mode Switching on emergency mode can be switched on temporarily. Operating instructions for the heat pump, In emergency mode, the available booster heaters pro- ViCare app or ViGuide vide room heating and DHW heating.

  • Page 41: Parameters Parameter Settings

    Parameters Parameter settings The parameters can be adjusted via 3 user interfaces: Depending on the system equipment and which user ■ ■ HMI programming unit of the heat pump control unit interface is selected, not all parameters may be ■ ViGuide app available.

  • Page 42: Setting Parameters Via Viguide Web Applications

    Parameters Parameter settings (cont.) Name of parameter Number of parameter Current set value 504 Domestic hot water setpoint metadata Parameter currently in focus for value setting Unit for value 504.0 Minimum value Selected value 10°C 504.1 Low 10°C 504.1 Low °C °C CANCEL...
  • Page 43 Parameters Parameter settings (cont.) Example: Setting parameters for parameter category 504 DomesticHotWaterSetpointMetaData HPMU lead appliance, internal CAN bus:1 Metadata: Parameter values: Minimum value Low value Default High value Maximum val- 10.0 30.0 50.0 60.0 °C °C °C °C 95.0 °C Efficient lower Efficient upper limit...

  • Page 44: Commissioning Assistant 933 Type Of Heating/Cooling Circuit 1

    Commissioning assistant parameter group 933 Type of heating/cooling circuit 1 933.0 Properties, heating/cooling circuit 1 Type of heating/cooling circuit Value Meaning Fan convector Radiator heating Underfloor heating 934 Type of heating/cooling circuit 2 934.0 Properties of heating/cooling circuit 2 Type of heating/cooling circuit Value Meaning Fan convector...

  • Page 45: 1416 Operating Mode Of Heating/Cooling Circuit 2

    Commissioning assistant parameter group 1415 Operating mode of heating/cooling circuit 1 (cont.) Value Meaning Heating only Cooling only Heating and cooling System without external heating water/cool- ■ ant buffer cylinder: Automatic changeover between heating and cooling, depending on heat and cooling demand System with external heating water/coolant ■...

  • Page 46: 2540 Setting Low-Noise Mode

    Commissioning assistant parameter group 1418 Operating mode of heating/cooling circuit 4 (cont.) Value Meaning Heating only Cooling only Heating and cooling Changeover between heating and cooling via menu: See operating instructions or ViCare app. 2540 Setting low-noise mode 2540.0. Low-noise mode Value Meaning Low-noise mode is switched off.

  • Page 47: 2340.1 Enable Instantaneous Heating Water Heater, Dhw Heating

    Commissioning assistant parameter group 2340 Configuration of electric booster heater (cont.) 2340.1 Enable instantaneous heating water heater, DHW heating If the heat pump cannot cover the heat demand, the In addition, the instantaneous heating water heater can instantaneous heating water heater is automatically be enabled for DHW heating.
  • Page 48 Commissioning assistant parameter group 2543 Recommended operation/Smart Grid… (cont.) 2543.3 Smart Grid set value adjustment for buffer cylinder in heating mode If a value is set, the function for boosting the set tem- Note perature value via Smart Grid is enabled. If the poten- If several functions are enabled for Smart Grid, the tial-free contacts for Smart Grid from the power supply functions for DHW heating will have priority over the...

  • Page 49: General Parameter Group

    General parameter group 382 Units and time formats 382.0 Units of measurement Value Meaning SI system (metric system) Imperial system 382.1 Date format Value Meaning Day.month.year Month/day/year 382.2 Time format Value Meaning 24 hour display 12 hour display 505 Date 505.0 Date Setting the current date 506 Time...

  • Page 50: Automatic Summer/Wintertime Changeover

    General parameter group 896 Outside temperature 896.0 Correction for outside temperature To compensate for systematic measuring faults, a cor- The correction value can be positive or negative. The rection value (offset) can be set for the outside temper- correction value is added to the current outside tem- ature sensor.
  • Page 51 General parameter group 919 Outside temperature damping factor (cont.) ϑ Fig. 16 Outside temperature (not adjusted) Adjusted outside temperature 1240 Operating mode of secondary pump 1240.0 Operating mode, secondary pump If the secondary pump is switched on, this circulation Value Meaning pump runs in the selected operating mode.
  • Page 52 DHW parameter group 497 Settings for DHW circulation pump 497.0 Operation of DHW circulation pump Example: Value Meaning Parameter 497.0 set to 0. ■ The DHW circulation pump runs continuously ■ Parameter 497.2 set to 0. within the time program during the set time ■...
  • Page 53 DHW parameter group 497 Settings for DHW circulation pump (cont.) Example: Cylinder heating starts. The DHW circulation pump ■ Parameter 497.0 set to 0. keeps running. ■ Parameter 497.2 set to 0. ■ The time phase for the DHW circulation pump has started before the time phase for cylinder heating.
  • Page 54 DHW parameter group 504 Limits for set DHW temperature (cont.) 504.3 Max. set cylinder temperature Max. selectable set cylinder temperature: Danger Do not set this value lower than the value in parame- There is a risk of scalding at DHW temperatures ter 504.1.

  • Page 55: 875.0 Start Time Increased Dhw Hygiene

    DHW parameter group 874 Hygiene function for set cylinder temperature 874.0 Set cylinder temperature for increased DHW hygiene function At specified intervals, the hygiene function heats the Danger cylinder temperature to this set temperature. On each There is a risk of scalding at DHW temperatures occasion, the cylinder temperature is maintained at above 60 °C.

  • Page 56: 1085 Hysteresis For Cylinder Heating

    DHW parameter group 1085 Hysteresis for cylinder heating 1085.0 Start hysteresis, set cylinder temperature The set value specifies at what temperature below the Set cylinder temperature current set cylinder temperature DHW heating will Cylinder temperature start. DHW heating demand DHW heating OFF DHW heating ON Fig.

  • Page 57: 1101 Speed Settings Of The Secondary Pump For Dhw Heating

    DHW parameter group 1101 Speed settings of the secondary pump for DHW heating 1101.0 Secondary pump min. speed for DHW heating Only change the factory setting if the minimum flow Minimum speed of the internal secondary pump for rate for DHW heating is not reached: See chapter DHW heating "Flow rate control with Hydro AutoControl".

  • Page 58: 3066 High Dhw Demand Recognised

    DHW parameter group 3029 Operating mode for DHW heating (cont.) ϑ Cylinder temperature, top Cylinder temperature, centre Loading cylinder return temperature Value in parameter 3068.0 plus value in parame- ter 2257.0 DHW heating status DHW heating OFF DHW heating ON Draw-off ON Draw-off OFF Comfort mode OFF...

  • Page 59: 3069 Dhw Demand Sensor

    DHW parameter group 3069 DHW demand sensor 3069.0 DHW demand sensor Cylinder temperature sensor through which DHW heat- In both cases, DHW heating ends once all cylinder ing with loading cylinder is switched on in efficiency temperature sensors have reached the set cylinder mode.

  • Page 60: Parameter Group For Heat-Notes

    Parameter group for heating/cooling circuit Notes Important information on setting the parameters for the heating/cooling circuits ■ The number of heating/cooling circuits available depends on the type of heat pump and on the sys- tem configuration. System without external buffer cylinder: –...

  • Page 61: Properties, Heating/Cooling Circuit 1

    Parameter group for heating/cooling circuit 933 Properties, heating/cooling circuit 1 933.3 Priority DHW heating, heating/cooling circuit 1 Room heating can be temporarily interrupted to make Value Meaning the heat-up time for DHW heating shorter. For this pur- Without priority: pose, the heating circuit pump for heating/cooling cir- Simultaneous room heating and DHW heating cuit 1 is switched off.

  • Page 62: Temperature Differential, Flow Temperature, Heating/Cooling Cir- Cuit 2

    Parameter group for heating/cooling circuit 934 Properties, heating/cooling circuit 2 (cont.) Value Meaning Without priority: Simultaneous room heating and DHW heating possible With priority: No room heating during DHW heating ■ Heating circuit pump for heating/cooling cir- ■ cuit 2 is switched off for the duration of DHW heating.

  • Page 63: Temperature Differential, Flow Temperature, Heating/Cooling Cir- Cuit 3

    Parameter group for heating/cooling circuit 935 Properties, heating/cooling circuit 3 (cont.) 935.5 Temperature differential, flow temperature, heating/cooling circuit 3 The required heating water temperature for heating/ This enables the mixer to regulate more effectively and cooling circuit 3 with mixer corresponds to the set flow prevents it from being permanently open.

  • Page 64: Room Temperature Influence, Heating/Cooling Circuit 4

    Parameter group for heating/cooling circuit 936 Properties, heating/cooling circuit 4 (cont.) 936.7 Room temperature influence, heating/cooling circuit 4 With room temperature influence, the set flow temper- Necessary conditions for room temperature influence: ature determined from the heating curve is adjusted Room temperature sensor is connected.
  • Page 65 Parameter group for heating/cooling circuit 1102 Speed settings for heating circuit pump,… (cont.) 1102.1 Heating circuit pump max. speed, heating/cooling circuit 1 Only change the factory setting if the minimum flow Maximum speed of the internal heating circuit pump for rate in heating/cooling circuit 1 is not reached: See room heating/room cooling, heating/cooling circuit 1 chapter "Flow rate control with Hydro AutoControl".
  • Page 66 Parameter group for heating/cooling circuit 1192 Set flow temperature limits,… (cont.) The set flow temperature for heating mode results from Note the following: ■ Since the heat pump control unit only limits the set ■ Weather-compensated heating mode: In line with the value with this parameter, a temperature limiter for set heating curve and the set room temperature restricting the maximum temperature (accessories)
  • Page 67 Parameter group for heating/cooling circuit 1194 Set flow temperature limits,… (cont.) If the calculation results in a lower set flow temperature This value cannot be set higher than max. value in than the value set here, the set flow temperature will parameter 1194.1.
  • Page 68 Parameter group for heating/cooling circuit 1232 Configuration of general digital input 1 (cont.) Value Meaning External demand, DHW circulation pump If the connected button is pressed, the DHW circulation pump runs for the duration set in parameter 497.4. External blocking Refrigerant circuit, instantaneous heating wa- ter heater and external heat generator (if in- stalled) are blocked.
  • Page 69 Parameter group for heating/cooling circuit 1396 Heating limit: Economy function, outside… (cont.) Value Meaning Economy function inactive Economy function active 1396.1 Summer saving temperature threshold, heating/cooling circuit 2 Heating limit for economy function, outside tempera- If the adjusted outside temperature (parame- ■...
  • Page 70 Parameter group for heating/cooling circuit 1398 Heating limit: Economy function, outside… (cont.) Value Meaning Economy function inactive Economy function active 1398.1 Summer saving temperature threshold, heating/cooling circuit 4 Heating limit for economy function, outside tempera- If the adjusted outside temperature (parame- ■...
  • Page 71 Parameter group for heating/cooling circuit 1630 External set temperature for heating/cooling circuit 4 1630.0 External circuit fixed target temperature, heating/cooling circuit 4 Set flow temperature, external demand, heating/cool- ing circuit 4: Set flow temperature for heating/cooling circuit 4 in the case of external demand to the heat pump, irrespec- tive of the room temperature or actual outside temper- ature...
  • Page 72 Parameter group for heating/cooling circuit 2406 Constant set flow temperature, heating/cooling circuit 2 2406.0 Set flow temperature for cooling, heating/cooling circuit 2 Effective set flow temperature for cooling mode via Upon demand via the set room temperature, cooling ■ heating/cooling circuit 2 is performed with the flow temperature set here.
  • Page 73 Parameter group for heating/cooling circuit 2408 Constant set flow temperature, heating/cooling circuit 4 2408.0 Set flow temperature for cooling, heating/cooling circuit 4 Effective set flow temperature for cooling mode via Upon demand via the set room temperature, cooling ■ heating/cooling circuit 4 is performed with the flow temperature set here.
  • Page 74 Parameter group for heating/cooling circuit 2409 Set flow temperature limits, cooling,… (cont.) If the setting results in a higher set flow temperature than the value set here, the set flow temperature will be limited to this value. 2410 Set flow temperature limits, cooling, heating/cooling circuit 2 2410.0 Min.
  • Page 75 Parameter group for heating/cooling circuit 2411 Set flow temperature limits, cooling,… (cont.) 2411.1 Max. limit of set flow temperature for cooling, heating/cooling circuit 3 Limiting of set flow temperature for cooling via heating/ If the setting results in a higher set flow temperature cooling circuit 3 than the value set here, the set flow temperature will be limited to this value.
  • Page 76 Parameter group for heating/cooling circuit 2413 Threshold value, cooling activation and deactivation, heating/cooling circuit 1 2413.0 Start condition, cooling, heating/cooling circuit 1 Start condition for operation of the heating circuit pump If the adjusted outside temperature exceeds the set in heating/cooling circuit 1 for weather-compensated room temperature selected plus the value set here, the room cooling: circulation pump switches on.
  • Page 77 Parameter group for heating/cooling circuit 2416 Threshold value, cooling activation and… (cont.) 2416.1 Stop condition, cooling, heating/cooling circuit 4 Stop condition for operation of the heating circuit pump If the adjusted outside temperature falls below the in heating/cooling circuit 4 for weather-compensated selected set room temperature by the value set here, room cooling: the circulation pump switches off.
  • Page 78 Parameter group for heating/cooling circuit 2426 Energy saving function, heating/cooling circuit 1 2426.0 Enable economy function, outside temperature, heating/cooling circuit 1 Energy saving function for the heating circuit pump of Value Meaning heating/cooling circuit 1 for weather-compensated cen- Energy saving function off tral heating Energy saving function on: If the adjusted outside temperature ex-...
  • Page 79 Parameter group for heating/cooling circuit 2428 Energy saving function, heating/cooling circuit 3 2428.0 Enable economy function, outside temperature, heating/cooling circuit 3 Energy saving function for the heating circuit pump of Value Meaning heating/cooling circuit 3 for weather-compensated cen- Energy saving function off tral heating Energy saving function on: If the adjusted outside temperature ex-...
  • Page 80 Parameter group for heating/cooling circuit 2452 Room temperature limit for cooling, heating/cooling circuit 1 2452.0 Start hysteresis, cooling, heating/cooling circuit 1 Only in conjunction with a room temperature sensor If the room temperature exceeds the set room temper- (extended cooling mode): Start hysteresis for room ature by the set temperature differential, cooling is temperature-dependent cooling mode via heating/cool- switched on.
  • Page 81 Parameter group for heating/cooling circuit 2455 Room temperature limit for cooling, heating/cooling circuit 4 2455.0 Start hysteresis, cooling, heating/cooling circuit 4 Only in conjunction with a room temperature sensor If the room temperature exceeds the set room temper- (extended cooling mode): Start hysteresis for room ature by the set temperature differential, cooling is temperature-dependent cooling mode via heating/cool- switched on.
  • Page 82 Parameter group for heating/cooling circuit 2501 Pump type, heating/cooling circuit 3 2501.0 Pump type, heating/cooling circuit 3 Manufacturer of the circulation pump for heating/cool- Value Meaning ing circuit 3: Required for processing operating data Control of circulation pump via pump relay from the circulation pump in the heat pump control unit.
  • Page 83 Parameter group for external heat generator 2404 Dual mode control mode 2404.0 Dual mode operation, external heat generator This parameter specifies the temperature ranges in When the outside temperature is above dual mode ■ which the external heat generator may be switched on temperature simultaneously with or as an alternative to the heat –...
  • Page 84 Parameter group for external heat generator 2404 Dual mode control mode (cont.) 2404.1 Dual mode temperature If the adjusted outside temperature (long term aver- Above the dual mode temperature, the external heat age) falls below the value set here for an extended generator only starts under the following conditions: period, the external heat generator can be started in ■...
  • Page 85 Parameter group for external heat generator 2796 Configuration of external heat generator 2796.0 Enable external heat generator, central heating The external heat generator can be enabled for heat- Value Meaning ing mode. External heat generator is blocked for central If the heat pump cannot cover the heat demand from heating.
  • Page 86 Parameter group for external heat generator 2940 Delay, external heat generator 2940.0 Start delay, external heat generator The external heat generator does not start within the specified period following a change of the set flow tem- perature in the secondary circuit. This may occur for example during a change in operating status in the time program for central heating or following a change- over between central heating and DHW heating.
  • Page 87 Parameter group for buffer cylinder with heating and cooling 3070 Buffer cylinder set value operating mode 3070.0 Buffer target operation mode Operating mode of external buffer cylinder: Value Meaning The value set here applies to all heating/cooling cir- Only room heating cuits.
  • Page 88 Replace faulty components only with genuine ■ Switch off the power supply to the indoor unit and Viessmann spare parts. outdoor unit, e.g. at a separate fuse or mains isola- tor. Check that the system is no longer live. Work on the refrigerant circuit...
  • Page 89 Messages Notes on messages (cont.) When isolating the system from the power supply, all The following start sequence must always be poles of the electrical installation must be disconnec- observed: ted from the live parts. 1. Switch on power supply to indoor unit. ■...
  • Page 90 Messages Fault messages (cont.) F.3 Lead break, return temperature sensor Measures System characteristics 1. Check connection X4.3/X4.4 on the EHCU electron- ics module: ■ No defrost ■ Check wires and plugs for correct seating. ■ No room cooling ■ Check connections for contact corrosion. Check cables for mechanical damage, e.g.
  • Page 91 Messages Fault messages (cont.) Measures 1. Check the sensor and connection: Wall mounted indoor unit: Connection on underside of the appliance, 6-pole connection socket on the right, terminals 9 and 10 (plug 5 on HPMU electronics module) Floorstanding indoor unit: Connection X3.3/X3.4 (plug 5) on HPMU electronics module ■...
  • Page 92 Messages Fault messages (cont.) F.23 Lead break, top cylinder temperature sensor ("DHW 1") F.23 Measures System characteristics 1. Check connection X1.7/X1.8 on the SLP ADIO elec- tronics module: No DHW heating ■ Check wires and plugs for correct seating. ■ Check connections for contact corrosion.
  • Page 93 Messages Fault messages (cont.) F.74 Hydraulic system pressure too low F.74 3. Check the pre-charge pressure of the expansion vessel. System characteristics 4. Check connection X11 on the EHCU electronics module: The heat pump is switched off. ■ Check wires and plugs for correct seating. ■...
  • Page 94 Messages Fault messages (cont.) F.91 Communication error, DIO F.91 3. Check power supply to HHPMU electronics module, terminals X4.1/X4.2: 24 V to 28 V System characteristics 4. Replace the DIO electronics module. ■ Heat pump in control mode ■ DIO electronics module in emergency mode Cause DIO electronics module communication error Measures...
  • Page 95 Messages Fault messages (cont.) F.100 PlusBus voltage error F.100 3. Turn off the ON/OFF switch on the indoor unit. Wait at least 2 min. Turn on the ON/OFF switch. System characteristics 4. Disconnect all connected subscribers. Replace the HPMU electronics module. Connect the subscribers ■...
  • Page 96 Messages Fault messages (cont.) F.111 Lead break, refrigerant inlet temperature sensor, evaporator OCT F.111 Measures System characteristics 1. Check connection and plug-in connection P804 on the ODUC refrigerant circuit controller. Refrigerant circuit off Check that the sensor including spring is securely fitted.
  • Page 97 Messages Fault messages (cont.) Measures 1. Check connections and plug-in connection P801 on the ODUC refrigerant circuit controller. Check that the sensor including spring is securely fitted. 2. Check resistor R for NTC 50 k on the disconnected Ω plug. If R > 900 k , replace the sensor.
  • Page 98 Messages Fault messages (cont.) F.430 Communication error, gateway F.430 4. Replace CAN bus Gateway cable. 5. Check power supply to the gateway. System characteristics 6. Replace gateway. Operation with internal set value specifications of the heat pump control unit Cause Gateway (WAGO KNX/TP) communication error Measures 1.
  • Page 99 1. Check DIP switch settings on ODUC refrigerant cir- cuit controller: See chapter "DIP switch settings for the ODUC refrigerant circuit controller". 2. Have a master reset carried out by Viessmann Technical Service. F.472 Communication with energy meter interrupted F.472 4.
  • Page 100 Messages Fault messages (cont.) F.520 Internal fault, gateway F.520 Measures System characteristics 1. Check system configuration for gateway: CAN bus subscriber number 90 ■ Normal operation 2. Turn off the ON/OFF switch on the indoor unit. Wait ■ No external demand possible at least 2 min.
  • Page 101 Messages Fault messages (cont.) F.547 Short circuit, flow temperature sensor HC 3 F.547 3. Check resistor R for NTC 10 k on the disconnected Ω plug. If R < 500 , replace the sensor. Ω System characteristics 4. Replace ADIO electronics module. Mixer closes.
  • Page 102 Messages Fault messages (cont.) F.578 Lead break, room temperature sensor, wireless remote control F.578 Measures System characteristics 1. Check the power supply to the wireless remote con- trol. Normal operation without room temperature influence 2. Check the settings for the wireless remote control using the ViGuide app.
  • Page 103 Messages Fault messages (cont.) F.686 Communication error, refrigerant circuit controller F.686 3. Refrigerant circuit controller: Check voltage U: P108 connection: System characteristics ■ U < 5 V or > 7 V : Perform a further check on disconnected plug P108 The refrigerant circuit will not start.
  • Page 104 Messages Fault messages (cont.) F.744 Programming unit is not compatible F.744 Measures System characteristics Inform Viessmann Technical Service. HMI programming unit has limited or no functionality Cause Incompatible HMI programming unit F.745 Incompatible system configuration F.745 Measures System characteristics Inform Viessmann Technical Service.
  • Page 105 Check the position and number of terminators. ■ Cause Communication error with another CAN bus subscriber (e.g. slave heat pump or other Viessmann appliance) Measures Check the following CAN bus connections: ■ Connections X8.1 to X8.3 on plug 91 on the HPMU electronics module ■...
  • Page 106 Messages Fault messages (cont.) Measures 1. Check connections and plug-in connec- tion X2.1/X2.2 on the EHCU electronics module. 2. Check resistor R for NTC 10 k on the disconnected Ω plug. If R > 300 k , replace the sensor. Ω...
  • Page 107 Messages Fault messages (cont.) F.791 Failure, instantaneous heating water heater, phase 1 F.791 Measures System characteristics 1. Turn off the ON/OFF switch on the indoor unit. Wait at least 2 min. Turn on the ON/OFF switch. Phase 1 of the instantaneous heating water heater not 2.
  • Page 108 Messages Fault messages (cont.) F.793 Failure, instantaneous heating water heater, phase 3 F.793 3. Check that the instantaneous heating water heater is correctly wired for 1, 2 or 3-phase mains connec- System characteristics tion. For 1 and 2-phase mains connection, check setting Phase 3 of the instantaneous heating water heater not for output restriction (1-phase: 3 kW, 2-phase: 5 available...
  • Page 109 Messages Fault messages (cont.) Measures 1. At the centre of the pump casing, press the coupling and simultaneously turn the pump shaft. 2. Check the impeller. If required, remove the rotor. Remove dirt. If required, flush and vent the system. 3.
  • Page 110 Messages Fault messages (cont.) Measures 4. Check high pressure sensor connecting cable ICT, connections and plug-in connection X20.1 to X20.3 1. Remove Schrader valve from liquid line to indoor on the EHCU electronics module. Replace the high unit. Purge refrigerant lines. pressure sensor ICT if necessary.
  • Page 111 Messages Fault messages (cont.) F.812 Fault, upper fan F.812 4. Check fuse T 3.5 A H on ODUC refrigerant circuit controller. Replace fan if necessary. System characteristics 5. If fan does not start automatically: Check connecting cable, connections and plug-in connection P602 on The refrigerant circuit will not start.
  • Page 112 Messages Fault messages (cont.) F.836 Load current of inverter too high (excess current) F.836 Measures System characteristics 1. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. Refrigerant circuit off: Inverter and compressor cannot 2.
  • Page 113 Messages Fault messages (cont.) F.862 Internal inverter fault F.862 Measures System characteristics 1. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. Compressor off 2. If message occurs frequently, replace ODUC refrig- erant circuit controller. Cause Internal inverter fault F.864 Defrost not terminated successfully...
  • Page 114 Messages Fault messages (cont.) F.876 Lead break, combined sensor, flow rate/temperature F.876 Measures System characteristics 1. Check flow sensor and connections X19.1 to X19.4 on the EHCU electronics module: Heat pump off ■ Check wires and plugs for correct seating. ■...
  • Page 115 2. If necessary, replace the indoor unit or outdoor unit. Cause Indoor unit and outdoor unit incompatible F.909 No information on Viessmann Energy Management (HEMS) F.909 ■ An appliance is present in the CAN bus system that is not supported by Viessmann Energy Management.
  • Page 116 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to energy meter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 117 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to energy meter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 118 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to energy meter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 119 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to energy meter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 120 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to energy meter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 121 See inverter documentation. F.944 Data from consumer 1 not available F.944 Possible consumers: ■ Heat pump with Viessmann One Base and CAN bus System characteristics connection ■ Heat pump with Vitotronic 200, type WO1C and No information on Viessmann Energy Management...
  • Page 122 4. Read out and check the ID numbers from Possible consumers: Viessmann Technical Service. ■ Heat pump with Viessmann One Base and CAN bus See relevant consumer documentation. connection Heat pump with Vitotronic 200, type WO1C and ■...
  • Page 123 Data from consumer 5 not available if required. 4. Read out and check the ID numbers from Possible consumers: Viessmann Technical Service.. Heat pump with Viessmann One Base and CAN bus See relevant consumer documentation. ■ connection ■ Heat pump with Vitotronic 200, type WO1C and EEBUS connection ■...
  • Page 124 Fault messages (cont.) Possible consumers: 3. Check settings for Viessmann energy management ■ Heat pump with Viessmann One Base and CAN bus (HEMS) in commissioning assistant. Adjust settings connection if required. ■ Heat pump with Vitotronic 200, type WO1C and 4.
  • Page 125 Data from consumer 10 not available if required. 4. Read out and check the ID numbers from Possible consumers: Viessmann Technical Service. Heat pump with Viessmann One Base and CAN bus See relevant consumer documentation. ■ connection Heat pump with Vitotronic 200, type WO1C and ■...
  • Page 126 Data from consumer 13 not available if required. 4. Read out and check the ID numbers from Possible consumers: Viessmann Technical Service. Heat pump with Viessmann One Base and CAN bus See relevant consumer documentation. ■ connection Heat pump with Vitotronic 200, type WO1C and ■...
  • Page 127 No information on Viessmann Energy Management 2. Check data connection to generator, e.g. CAN bus. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 128 Messages Fault messages (cont.) 3. Check settings for Viessmann energy management See generator documentation. (HEMS) in commissioning assistant. Adjust settings if required. 4. Read out and check the ID numbers from Viessmann Technical Service. F.962 Data from generator 4 not available F.962...
  • Page 129 Messages Fault messages (cont.) Possible generators: 3. Check settings for Viessmann energy management ■ Photovoltaic system with CAN bus connection to (HEMS) in commissioning assistant. Adjust settings energy meter if required. ■ Photovoltaic system with CAN bus connection to 4. Read out and check the ID numbers from Vitocharge VX3 Viessmann Technical Service.
  • Page 130 Run software update if required. No information on Viessmann Energy Management 2. Check CAN bus connection to power storage unit. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required.
  • Page 131 Messages Fault messages (cont.) Measures 1. Check the sensor at the following connections: ■ Terminals X17.1/X17.2 on EHCU electronics mod- Wall mounted indoor unit: ■ 6-pole connection socket on underside of appli- ance on left, terminals 5 and 6 ■ Floorstanding indoor unit: Extra low voltage (ELV) terminal area <...
  • Page 132 Messages Fault messages (cont.) Measures 1. Check the sensor and the following connections: ■ Terminals X17.1/X17.2 on EHCU electronics mod- Wall mounted indoor unit: ■ 6-pole connection socket on underside of appli- ance on left, terminals 5 and 6 ■ Floorstanding indoor unit: Extra low voltage (ELV) terminal area <...
  • Page 133 Messages Fault messages (cont.) Measures 1. Check the sensor and the following connections: ■ Terminals X17.1/X17.2 on EHCU electronics mod- Wall mounted indoor unit: ■ 6-pole connection socket on underside of appli- ance on left, terminals 5 and 6 ■ Floorstanding indoor unit: Extra low voltage (ELV) terminal area <...
  • Page 134 Messages Fault messages (cont.) Measures 1. Check the sensor and the following connections: ■ Terminals X17.1/X17.2 on EHCU electronics mod- Wall mounted indoor unit: ■ 6-pole connection socket on underside of appli- ance on left, terminals 5 and 6 ■ Floorstanding indoor unit: Extra low voltage (ELV) terminal area <...
  • Page 135 F.1008 Measures System characteristics 1. Check the number of additional CAN bus subscrib- ers (e.g. slave heat pump and/or other Viessmann The most recently connected additional CAN bus sub- appliances). scriber is not recognised by the (master) heat pump 2. Disconnect the unsupported CAN bus subscriber (main appliance).
  • Page 136 Messages Fault messages (cont.) F.1014 Incorrect setting of the DIP switches F.1014 Measures System characteristics Check DIP switch settings on ODUC refrigerant circuit controller. Adjust if necessary: See chapter "DIP switch No heat generation settings for the ODUC refrigerant circuit controller". Cause Incorrect DIP switch settings on ODUC refrigerant cir- cuit controller...
  • Page 137 Messages Fault messages (cont.) F.1017 Secondary circuit flow temperature sensor downstream of condenser not recognised F.1017 Further message F.770: Check resistor R for ■ NTC 10 k on disconnected plug. If R > 300 k Ω Ω System characteristics replace the sensor. ■...
  • Page 138 Messages Fault messages (cont.) F.1019 Secondary heat exchanger, liquid gas temperature sensor not available F.1019 Further message F.123: Check resistor R for ■ NTC 10 k on disconnected plug. If R > 300 k Ω Ω System characteristics replace the sensor. ■...
  • Page 139 Messages Fault messages (cont.) Measures 4. Replace CAN bus cable. 5. Replace the HPMU electronics module. 1. Turn off the ON/OFF switch on the indoor unit. Wait at least 2 min. Turn on the ON/OFF switch. 2. Check configuration for correct HPMU electronics module.
  • Page 140 Messages Fault messages (cont.) Measures 1. Check connection TS2.1/TS2.2 on the HIO electron- ics module: ■ Check wires and plugs for correct seating. Check connections for contact corrosion. ■ Check cables for mechanical damage, e.g. crush- ■ ing, kinking, chafing or breakage. 2.
  • Page 141 Messages Fault messages (cont.) Measures 1. Check 230 V~ power supply on inverter. 2. Isolate the outdoor unit from the power supply. Wait at least 2 min. Switch on voltage again. 3. Replace ODUC refrigerant circuit controller. F.1065 Power supply, power supply utility too low F.1065 Measures System characteristics...
  • Page 142 Messages Fault messages (cont.) Measures If message occurs more than twice an hour: 1. Carry out pressure test on refrigerant circuit. If nec- essary, purge refrigerant circuit. 2. Check the temperatures via the "Diagnosis" menu. 3. Check the sensor and connection P802 on the ODUC refrigerant circuit controller: ■...
  • Page 143 Messages Fault messages (cont.) F.1081 Flow temperature of secondary circuit or heating/cooling circuit 1 too low F.1081 Measures System characteristics If message occurs more than twice an hour: 1. Ensure minimum flow rate. Refrigerant circuit off 2. Check refrigerant circuit for damage. Top up refriger- ant if necessary.

  • Page 144: Warning Messages

    Messages Warning messages A.2 Frost protection limit undershot Cause System characteristics Outside temperature has undershot the specified frost protection limit. ■ Frost protection enabled ■ Heat demand, heat pump running. Measures DHW circulation pump enabled ■ No action required A.11 System pressure too low A.11 Measures System characteristics...
  • Page 145 Messages Warning messages (cont.) Measures 1. Set period for increased DHW hygiene to fall on a period with low DHW demand. 2. Check DHW cylinder sizing. A.21 Hydraulic system pressure A.21 Measures System characteristics Check the expansion vessel. The safety valve in the indoor unit has opened. Cause Hydraulic system pressure too high A.62 PWM signal, heating circuit pump, heating/cooling circuit 1...
  • Page 146 A.66 Heating circuit pump for heating/cooling circuit 1 not running A.66 Measures System characteristics Use only spare parts supplied or approved by Viessmann. Secondary pump/heating circuit pump, heating/cooling circuit 1 not running. Cause ■ No PWM signal, secondary pump/heating circuit pump, heating/cooling circuit 1 ■...
  • Page 147 Messages Warning messages (cont.) A.83 Signal, cylinder temperature sensor faulty A.83 Wall mounted indoor unit: ■ Connection on underside of the appliance, 6-pole System characteristics connection socket on the right, terminals 9 and 10 (plug 5 on HPMU electronics module) Limited DHW heating ■...
  • Page 148 Cause Evaporator overheating A.89 Condenser overheating A.89 Measures System characteristics 1. No action required 2. If the message appears often: Inform Viessmann Heat pump temporarily off Technical Service. Cause Condenser overheating A.90 Temperature, hot gas temperature sensor CTT A.90 Measures...
  • Page 149 Messages Warning messages (cont.) A.91 Refrigerant circuit temporarily off A.91 Cause System characteristics ■ Outside temperature too low for heat pump operation ■ Operation without outdoor unit, for example for ■ The refrigerant circuit is temporarily switched off screed drying ■...
  • Page 150 Messages Warning messages (cont.) A.109 Actual boiler temperature too low A.109 Measures System characteristics 1. Check connections and plug-in connection at TS2.1/ TS2.2 on HIO electronics module. ■ Heat pump temporarily off 2. Check resistor R for NTC 10 k on disconnected Ω...
  • Page 151 Messages Warning messages (cont.) A.113 Unstable DC voltage in inverter intermediate circuit A.113 Measures System characteristics Check DC voltage in inverter intermediate circuit. Refrigerant circuit temporarily off Cause Unstable DC voltage in inverter intermediate circuit A.115 Unstable mains voltage (power supply utility) A.115 Measures System characteristics...

  • Page 152: Service Messages

    Messages Warning messages (cont.) Measures No action required A.125 Heating mode: Evaporator overheating A.125 Measures System characteristics If the message appears often: Check the evaporator for dirt. Clean if necessary. Refrigerant circuit temporarily off Cause Heating mode: Evaporator overheating Service messages Message Meaning Maintenance due according to time interval.
  • Page 153 Messages Status messages (cont.) Message Meaning S.128 Heat pump in defrost mode S.129 Heat pump run-on phase S.130 Instantaneous heating water heater switched off S.131 Instantaneous heating water heater: Stage 1 active S.132 Instantaneous heating water heater: Stage 2 active S.133 Instantaneous heating water heater: Stage 3 active S.134...
  • Page 154 Messages Status messages (cont.) Message Meaning S.196 Power-OFF enabled S.197 Heat demand, heating/cooling circuit 1 S.198 Cooling demand for heating/cooling circuit 1 S.199 Heat demand, heating/cooling circuit 2 S.200 Cooling demand for heating/cooling circuit 2 S.201 Heat demand, heating/cooling circuit 3 S.202 Cooling demand for heating/cooling circuit 3 S.203...

  • Page 155: Information Messages

    Messages Status messages (cont.) Message Meaning S.400 Active frost protection for external heating/cooling water buffer cylinder switched on S.401 Active frost protection for external heating water buffer cylinder switched on S.402 Active frost protection for external cooling water buffer cylinder switched on Note on frost protection ■...
  • Page 156 Messages Information messages (cont.) Message Meaning I.109 Max. compressor evaporation temperature reached I.110 Min. compressor pressure condition reached I.111 Min. compressor evaporation temperature reached I.112 Min. outlet temperature on condenser reached I.113 Smart Grid: Forced shutdown active I.114 Smart Grid: Standard mode active I.115 Smart Grid: Recommended switch-on active I.116...
  • Page 157 Messages Information messages (cont.) Message Meaning I.169 Heat pump is configured as a slave heat pump. I.170 Due to a fault, a slave heat pump temporarily takes over the task of the lead heat pump. I.176 Compressor with reduced output: Ambient temperature is higher than permissible operating tempera- ture for compressor.

  • Page 158: Can Bus Cable

    This main control unit is the main appliance tem: in both the internal and external CAN bus Main control unit of the respective Viessmann system. appliance 71 to 85 Other Viessmann devices in the system net- ■ Vitocal: HPMU electronics module work ■ Vitodens: HMU electronics module Gateway (KNX, BACnet, Modbus) ■...
  • Page 159 Appendix CAN bus cable (cont.) Terminator The Viessmann CAN bus is designed for "line" bus Last CAN bus subscriber topology with a terminator at both ends. Connection with terminator CAN bus cable This is why a distinction is made within a CAN bus sys-...
  • Page 160 Appendix Temperature sensors (cont.) Temperature sensor NTC 10 k Connection Ω Vitocal 200-S Vitocal 222-S Outside temperature sensor 6-pole connection socket on Luster terminals for sensors, ■ ■ ■ the underside of the appli- terminal 5 and 6 ance, terminals 11 and 12 Plug 1 on the HPMU electron- ■...
  • Page 161 Appendix Temperature sensors (cont.) Temperature sensor NTC 10 k Vitocal 222-SI connection Ω Outside temperature sensor Extra low voltage (ELV) terminal area, right-hand lus- ■ ■ ter terminal, connection 1 HPMU electronics module, terminals X3.1/X3.2 ■ Cylinder temperature sensor "DHW 1" SLP ADIO electronics module, terminals X1.7/X1.8 ■...
  • Page 162 Appendix Temperature sensors (cont.) Viessmann NTC 10 k (blue marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k ϑ...
  • Page 163 Appendix Temperature sensors (cont.) Temperature sensor Test element Air intake temperature sensor OAT NTC 10 k Ω ■ Evaporator temperature sensor OMT ■ Refrigerant inlet temperature sensor, evaporator OCT ■ Temperature sensor, heat sink, inverter HST ■ Hot gas temperature sensor CTT NTC 50 k Ω...

  • Page 164: Pressure Sensors

    Appendix Temperature sensors (cont.) NTC 50 k (no marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k ϑ...
  • Page 165 Appendix Status display, internal circulation pumps Meaning flashes Normal operation, circulation pump green. runs on demand. lights up Circulation pump runs continuously ■ green. with maximum output, e.g. when the PWM signal is interrupted. No fault message ■ lights up Fault with fault message ■...
  • Page 166 Certificates Declarations of Conformity for the heat pump We, Viessmann Climate Solutions SE, D-35108 Allendorf, declare as sole responsible body that the named product complies with the European directives and supplementary national requirements in terms of its design and operational characteristics.
  • Page 167 Keyword index Keyword index Buffer cylinder............87 Notes on messages........... 88 Buffer temperature sensor........160 Outside temperature sensor......160, 161 Checking Overview of subscriber numbers......158 – Pressure sensors..........164 Commissioning assistant........... 44 Cylinder temperature sensor........160 Parameters..............41 Cylinder temperature sensor (DHW 1).....161 –...
  • Page 168 Viessmann Climate Solutions SE Viessmann Climate Solutions SE 35108 Allendorf / Germany A Carrier Company A Carrier Company Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB Fax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com Fax: +44 1952 675040...

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Vitocal 222-sVitocal 222-si

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