Viessmann VITOCAL 150-A Service Instructions Manual
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Viessmann VITOCAL 150-A Service Instructions Manual

Viessmann VITOCAL 150-A Service Instructions Manual

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VIESMANN
Service instructions
for contractors
Viessmann One Base
System configuration and diagnostics for heat pumps with Viessmann One Base
Vitocal 150-A/151-A/250-A/252-A
Viessmann One Base
VITOCAL 150-A/151-A/250-A/252-A
Please keep safe.
6218234 AU
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 150-A/151-A/250-A/252-A Viessmann One Base VITOCAL 150-A/151-A/250-A/252-A Please keep safe. 6218234 AU 7/2024...

  • Page 2: Safety Instructions

    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 outdoor unit contains easily flamma- This symbol warns against the risk ble refrigerant in safety group A3...
  • Page 3 Safety instructions Safety instructions (cont.) Regulations to be observed National installation regulations Relevant country-specific safety regu- ■ ■ Statutory regulations for the prevention lations ■ of accidents Applicable regulations and guidelines ■ Statutory regulations for environmental for operation, service, maintenance, ■...

  • Page 4: Working On The System

    Safety instructions Safety instructions (cont.) Do not remove, block or bridge safety Please note ■ equipment. Electronic assemblies can be dam- Do not make any changes: aged by electrostatic discharge. ■ Do not modify the outdoor unit, inlet/ Before beginning work, touch outlet lines, electrical connections/ earthed objects, such as heating or cables or the surroundings.
  • Page 5 Safety instructions Safety instructions (cont.) A CO or powder extinguisher must be Danger ■ Refrigerant is under pressure: to hand in the following cases: Mechanical loading of lines and Refrigerant is being drained. – components can cause leaks in the Refrigerant is being topped up.

  • Page 6: Connecting Cables

    For installation and replacements, Seal the pipe entry to the building ■ use only Viessmann original parts using the most suitable current or spare parts approved by Viess- technology. Route the pipes into mann.
  • Page 7 Safety instructions Safety instructions (cont.) From a safe position, switch off the Danger ■ electricity supply for all system compo- If water escapes from the appli- nents. ance, there is a risk of scalding. Remove ignition sources from the dan- Never touch hot heating water.
  • Page 8 Safety instructions Safety instructions (cont.) Danger Temperature range for storage: 25 °C – ■ Escaping refrigerant can lead to fire bis 70 °C and explosions that result in very Only store the outdoor unit in its ex- ■ serious injuries or death. There is a factory protective packaging.

  • Page 9: Table Of Contents

    Index Index 1. Information Symbols ....................21 2. Introduction Scope of functions ................. 22 System examples .................. 22 3. Function description CAN bus system ..................23 CAN bus subscriber ................23 ■ Commissioning the CAN bus subscribers in a system network ..24 ■...
  • Page 10 Index Index 2540 Setting low-noise mode ..............56 2540.0. Low-noise mode ..............56 ■ 2340 Configuration of electric booster heater ........56 2340.0 Enable instantaneous heating water heater, central heating .. 56 ■ 2340.1 Enable instantaneous heating water heater, DHW heating ..57 ■...
  • Page 11 Index Index 504.6 Efficient upper limit ..............64 ■ 534 Circulation pump run-on after cylinder heating ....... 64 534.0 Circulation pump run-on after cylinder heating ......64 ■ 873 DHW hygiene function ..............64 873.0 Activation of increased DHW hygiene ........64 ■...
  • Page 12 Index Index 936.5 Temperature differential, flow temperature, heating/cooling cir- ■ cuit 4 ....................73 936.6 Room temperature influence, heating, heating/cooling circuit 4 73 ■ 936.7 Room temperature influence, heating/cooling circuit 4 ..... 74 ■ 1100 Speed settings for secondary pump in heating mode ....74 1100.0 Min.
  • Page 13 Index Index 1630.0 External circuit fixed target temperature, heating/cooling cir- ■ cuit 4 ....................81 2330 Function of digital input 2 .............. 81 2330.0 Function of digital input 2 ............81 ■ 2405 Constant set flow temperature, heating/cooling circuit 1 ....81 2405.0 Set flow temperature for cooling, heating/cooling circuit 1 ..
  • Page 14 Index Index 2416 Threshold value, cooling activation and deactivation, heating/ cooling circuit 4 ..................86 2416.0 Start condition, cooling, heating/cooling circuit 4 ....86 ■ 2416.1 Stop condition, cooling, heating/cooling circuit 4 ....87 ■ 2421 Temperature offset, heating/cooling circuit 1 ........ 87 2421.0 Temperature offset, heating/cooling circuit 1 ......
  • Page 15 Index Index 2796.1 Enable external heat generator, DHW heating ....... 95 ■ 2853 Start delay, external heat generator ..........95 2853.0 Start threshold, external heat generator ......... 95 ■ 2940 Delay, external heat generator ............96 2940.0 Start delay, external heat generator ........96 ■...
  • Page 16 Index Index F.472 Communication with energy meter interrupted ......112 ■ F.519 Communication error, BACnet ..........113 ■ F.520 Communication error, Modbus ..........113 ■ F.544 Lead break, flow temperature sensor HC 2 ......113 ■ F.545 Short circuit, flow temperature sensor HC 2 ......114 ■...
  • Page 17 F.876 Lead break, combined sensor, flow rate/temperature ....135 ■ F.881 Safety shutdown, refrigerant circuit .......... 135 ■ F.909 No information on Viessmann Energy Management (HEMS) ...135 ■ F.910 Multiple main appliances recognised ........136 ■ F.912 Inverter interior temperature sensor faulty ........ 136 ■...
  • Page 18 Index Index F.968 Data from battery module 4 not available ......... 150 ■ F.969 Data from battery module 5 not available ......... 150 ■ F.970 Data from battery module 6 not available ......... 150 ■ F.983 Inverter EEPROM faulty ............150 ■...
  • Page 19 Index Index F.1140 Lead heat pump off ..............166 ■ F.1172 Inverter recognises asymmetrical compressor currents ..166 ■ F.1173 Maximum number of inverter safety shutdowns interlock ■ input 1 reached ................... 167 F.1174 Forced safety shutdown, compressor - interlock input 2 ■...
  • Page 20 Index Index (cont.) A.99 Secondary circuit flow temperature too low ....... 181 ■ A.100 Settings deleted ............... 182 ■ A.101 Hot gas temperature not plausible ........... 182 ■ A.102 Suction gas temperature not plausible ........182 ■ A.109 Actual boiler temperature too low ..........182 ■...

  • Page 21: Information Symbols

    Information Symbols Symbols in these instructions Symbols on the heat pump Symbol Meaning Symbol Meaning Reference to another 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 22: Introduction Scope Of Functions

    Introduction Scope of functions These instructions contain the following information for air source heat pumps with indoor and outdoor unit and Viessmann One Base: ■ Function description ■ Parameters for matching the heat pump to different requirements and operating conditions: See page 51 onwards.

  • Page 23: 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 24: 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 25: Defrost Conditions

    Function description Defrost (cont.) Note The thermal energy of these 3 components is only fully available gradually, meaning that the defrost process can be aborted up to 8 times. If the defrost process is aborted 9 times, there is another cause. A message will be displayed. Defrost conditions If 1 of the following conditions applies, defrosting is active:...
  • Page 26 Function description Defrost (cont.) Heating the integral buffer cylinder Flow diagram Fig. 4 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...

  • Page 27: Defrost Process

    Function description Defrost (cont.) Heat pump with integral instantaneous heating water Heating of the integral buffer cylinder ends as soon as ■ heater: the minimum return temperature is 2 K above the cal- If the output available from the outdoor unit is not culated set value.

  • Page 28: End Of The Defrost Process

    Function description Defrost (cont.) Flow temperature sensor, heating/cooling cir- Secondary pump cuit 2 For indoor unit with 2 integral heating/cooling cir- Indoor unit with 2 integral heating/cooling cir- cuits, also heating circuit pump for heating/cool- cuits: ing circuit 1 Heating circuit pump, heating/cooling circuit 2 Flow sensor Integral buffer cylinder The defrost process starts as soon as heating of the...

  • Page 29: Heating/Cooling

    Function description Heating/cooling System configuration The max. number of heating/cooling circuits that can be connected depends on the system equipment. The system equipment is configured during commissioning of the heat pump using the commissioning assistant. Max. number of heating/cooling circuits Heat pump type System without external buffer System with external buffer cylin-...

  • Page 30: Determining The Flow Temperature With Weather Compensation

    Function description Heating/cooling (cont.) Determining the flow temperature with weather compensation The heat pump control unit determines the set flow To compensate for sensor-related deviations, a correc- temperature for each heating/cooling circuit from the tion value (offset) can be set for the measured outdoor following values: temperature in parameter 896.0.

  • Page 31: Control Of The Flow Temperature For Indoor Units With 1 Integral Heating/Cooling Circuit

    Function description Heating/cooling (cont.) Parameters for temperature limits Temperature limits Heating/cooling Heating/cooling Heating/cooling Heating/cooling cir- circuit 1 circuit 2 circuit 3 cuit 4 Heating mode Min. flow tempera- Parameter 1192.0 Parameter 1193.0 Parameter 1194.0 Parameter 1195.0 ■ ture Max. flow tempera- Parameter 1192.1 Parameter 1193.1 Parameter 1194.1...

  • Page 32: 4/3-Way Valve Position For Heating/Cooling Demand

    Function description Heating/cooling (cont.) Heating/cooling circuit 2 without mixer Heating/cooling circuit 2 may only be heated for a ■ short time with a set flow temperature 5 K higher The flow temperature is controlled via the mixing func- than heating/cooling circuit 1. If heating/cooling cir- tion of the 4/3-way valve and the speed of the integral cuit 2 is an underfloor heating circuit, the max.
  • Page 33 Function description Heating/cooling (cont.) Flow diagram, heating/cooling mode, heating/cooling circuit 1 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 Integral buffer cylinder (not available with all heat pump types) Heating circuit pump, heating/cooling circuit 1...
  • Page 34 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. 7 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 35 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. 8 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 36: 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 37: 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 38: 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 39: 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 40 Function description DHW heating (cont.) Flow diagram Fig. 11 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 41 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 42 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 43: 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 44: 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 45: 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 46: 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 47: Float Air Vent Valve

    Only replace the float air vent valve and quick- the heating water using the float air vent valve. This action air vent valve with original Viessmann prevents refrigerant from entering the interior of the parts. If other spare parts are used, the heat building via the heating water.

  • Page 48: Further Components Of The Safety Concept

    Function description Float air vent valve (cont.) Fig. 16 Refrigerant-free heating water from condenser Refrigerant Heating water containing refrigerant from con- Float denser Heating water Safety valve Discharge of refrigerant via the quick-action air Removal of refrigerant via the discharge pipe of vent valve the safety valve The heat pump (indoor and outdoor unit) and heating...

  • Page 49: Filling And Venting The System

    Function description Float air vent valve (cont.) Heating filter A heating filter is used to filter particles and sludge out of the heating water before it enters the heat pump. The filter properties of the heating filter with magnetite separation (accessories) are matched to the heat pump.

  • Page 50: Booster Heaters For Emergency Mode

    Function description Emergency mode (cont.) Switching on emergency mode Note Operating instructions for the heat pump, With a heat pump cascade, emergency mode has to ViCare app or ViGuide be switched on at each heat pump separately. Booster heaters for emergency mode The following booster heaters are available for emer- gency mode: Instantaneous heating water heater...

  • Page 51: System Configuration Setting Parameters

    System configuration Setting parameters 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 ■...

  • Page 52: Setting Parameters Via Viguide Web Applications

    4. "Add parameter" via the "Parameter search". To do this, first select the "Control unit" of the 1. Launch the ViGuide web application. Viessmann appliance in the CAN bus system. Under "Select parameter", use the number to 2. Under "Diagnosis" call up the "Extended param- search for the required parameter category and eters &...
  • Page 53 System configuration Setting parameters (cont.) Example: Setting parameters for parameter category 504 DomesticHotWaterSetpointMetaData HPMU lead appliance, internal CAN bus:1 Metadata: Parameter values: Min. value Low value Default High value Max. value 10.0 °C 30.0 °C 50.0 °C 60.0 °C 95.0 °C Efficient lower Efficient upper...

  • Page 54: 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, heating/cooling circuit 2 Type of heating/cooling circuit Value Meaning Fan convector...

  • Page 55: 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 56 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 57 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 58 Commissioning assistant parameter group 2543 Recommended mode/Smart Grid operating… (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 59: 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 506.0 Time...

  • Page 60: 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 61 General parameter group 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. Operation with constant speed setting (pa- rameter 1100.2) Value Meaning Do not adjust!
  • Page 62 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 63 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 64: 504.6 Efficient Upper Limit

    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 65: 874 Hygiene Function For Set Cylinder Temperature

    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 66: 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 67: 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 68: 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 69: 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 70: 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 71: 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 72: 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 73: 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 74: 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 75: 1102.1 Heating Circuit Pump Max. Speed, Heating/Cooling Circuit 1

    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 76: 1193 Set Flow Temperature Limits, Heating/Cooling Circuit 2

    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 77: 1194.1 Max. Flow Temperature, Heating, Heating/Cooling Circuit 3

    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 78: 1395 Heating Limit: Economy Function, Outside Temperature, Heating/ Cooling Circuit 1

    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 79: 1396.1 Summer Saving Temperature Threshold, Heating/Cooling Cir- Cuit 2

    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 80: 1398.1 Summer Saving Temperature Threshold, Heating/Cooling Cir- Cuit 4

    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 81: 1630 External Set Temperature For Heating/Cooling Circuit 4

    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 82 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 83 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 84 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 85 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 86 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 87 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 88 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 89 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 90 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 91 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 92 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 93 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 94 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 95 Parameter group for external heat generator 2796 Configuration of external heat generator 2796.0 Enable external heat generator, room heating The external heat generator can be enabled for heat- Value Meaning ing mode. External heat generator is blocked for room If the heat pump cannot cover the heat demand from heating.
  • Page 96 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 room heating or following a change- over between room heating and DHW heating.
  • Page 97 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 98 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 99 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 100 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 101 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 102 Messages Fault messages (cont.) F.33 Lead break, primary inlet temperature sensor, heat pump F.33 Measures System characteristics 1. Check connection X16.3/X16.4 on the VCMU refrig- erant circuit controller. Refrigerant circuit off ■ Check wires and plugs for correct seating. ■ Check connections for contact corrosion.
  • Page 103 Messages Fault messages (cont.) System insufficiently vented during commissioning 6. Check voltage U between X19.2 and X19.4 in ■ ■ Frozen residual heating water in the outdoor unit in EHCU electronics module: the area of the heating water outlet to the indoor unit ■...
  • Page 104 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 DIO electronics module. ■ Heat pump in control mode ■ DIO electronics module in emergency mode Cause DIO electronics module communication error Measures...
  • Page 105 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 HPMU electronics module. Connect the subscribers ■...
  • Page 106 Messages Fault messages (cont.) F.111 Lead break, liquid gas temperature sensor, heating F.111 Measures System characteristics 1. Check connection X16.1/X16.2 on the VCMU refrig- erant circuit controller: Refrigerant circuit off ■ Check wires and plugs for correct seating. ■ Check connections for contact corrosion. Cause Check cables for mechanical damage, e.g.
  • Page 107 Messages Fault messages (cont.) F.121 Communication error, inverter F.121 3. Replace the Gateway (Modbus) connecting lead. 4. Check power supply to the VCMU refrigerant circuit System characteristics controller, plug X1. 5. Replace VCMU refrigerant circuit controller. Refrigerant circuit off 6. Replace inverter. Cause No communication between inverter and heat pump control unit...
  • Page 108 Messages Fault messages (cont.) F.134 Communication error, inverter F.134 3. Check the configuration of the inverter (parameters). 4. Isolate the outdoor unit from the power supply. Wait System characteristics at least 2 min. Switch on voltage again. Normal operation Cause Communication error, inverter Measures 1.
  • Page 109 Messages Fault messages (cont.) F.149 Lead break, liquid gas temperature sensor, cooling F.149 Measures System characteristics 1. Check connection X21.1/X21.2 on the VCMU refrig- erant circuit controller: Refrigerant circuit in control mode with replacement ■ Check wires and plugs for correct seating. values ■...
  • Page 110 Messages Fault messages (cont.) F.155 Fault, electronic expansion valve 1 F.155 Measures System characteristics No action required Normal operation Cause Temporary deviation from the setting for electronic expansion valve 1 F.156 Fault, electronic expansion valve 2 F.156 Measures System characteristics No action required Normal operation Cause...
  • Page 111 Messages Fault messages (cont.) Measures 1. Replace CR2032 battery in HPMU electronics mod- ule. 2. Set the time on the HMI programming unit: See operating instructions. F.430 Communication error, gateway F.430 4. Replace CAN bus Gateway cable. 5. Check power supply to the gateway. System characteristics 6.
  • Page 112 VCMU refrigerant circuit controller. If necessary, update the software for all electronics Cause modules and the refrigerant circuit controller. 2. Have a master reset carried out by Viessmann ■ Incorrect software version for the electronics mod- Technical Service. ules and/or refrigerant circuit controller ■...
  • Page 113 Messages Fault messages (cont.) F.519 Communication error, BACnet F.519 Measures System characteristics 1. Check system configuration for gateway: CAN bus subscriber number 90 No communication with building management system 2. Turn off the ON/OFF switch on the indoor unit. Wait at least 2 min.
  • Page 114 Messages Fault messages (cont.) F.545 Short circuit, flow temperature sensor HC 2 F.545 Measures System characteristics 1. Check the sensor and connection X17.1/X17.2 on the EHCU electronics module: Mixer closes. Heating circuit pump is operational. ■ Check wires and plugs for correct seating. ■...
  • Page 115 Messages Fault messages (cont.) F.548 Lead break, flow temperature sensor HC 4 F.548 3. Check connection X1 on the ADIO electronics mod- ule: System characteristics ■ Check wires and plugs for correct seating. ■ Check connections for contact corrosion. Mixer closes. Heating circuit pump is operational. ■...
  • Page 116 Messages Fault messages (cont.) F.616 Incompatible software version in controller group recognised F.616 Measures System characteristics 1. Update software version of electronics modules via ViGuide. No demand going to outdoor unit. 2. Compare the software versions of the HPMU and VCMU electronics modules.
  • Page 117 Messages Fault messages (cont.) F.686 Communication error, refrigerant circuit controller F.686 4. Check and update the software versions of the HPMU, EHCU and VCMU electronics modules via System characteristics ViGuide. 5. Replace VCMU refrigerant circuit controller. The refrigerant circuit will not start. Cause VCMU refrigerant circuit controller communication error...
  • Page 118 ■ Check the position and number of terminators. 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...
  • Page 119 F.764 Another CAN bus subscriber reports a fault F.764 Cause System characteristics Fault message from another CAN bus subscriber (e.g. slave heat pump or other Viessmann appliance) Heat pump cascade: ■ Heating/cooling capacity and/or DHW output Measures impaired ■...
  • Page 120 ■ 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...
  • Page 121 Messages Fault messages (cont.) F.772 Lead break, compressor oil sump temperature sensor F.772 Measures System characteristics 1. Check connection X20.3/X20.4 on the VCMU refrig- erant circuit controller: Refrigerant circuit operates only when outside temper- ■ Check wires and plugs for correct seating. atures are >...
  • Page 122 Messages Fault messages (cont.) Measures 1. Check connections X1.1 to X1.5 on the EHCU elec- tronics 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. Replace connecting cable if necessary.
  • Page 123 Messages Fault messages (cont.) 3. Check that the instantaneous heating water heater 4. Check power supply L2: is correctly wired for 1, 2 or 3-phase mains connec- ■ No voltage at 136.L2: Check fuse. tion. ■ No voltage at K7.2: Check power cable. Replace For 1 and 2-phase mains connection, check setting power cable if necessary.
  • Page 124 Messages Fault messages (cont.) F.798 Mechanical fault, circulation pump, heating circuit 2 F.798 Measures System characteristics 1. At the centre of the pump casing, press the coupling and simultaneously turn the pump shaft. Heating circuit pump, heating/cooling circuit 2 is off. 2.
  • Page 125 Messages Fault messages (cont.) Measures 3. Check high pressure sensor connecting cable, con- nections and plug-in connection X20.1 to X20.3 on 1. Check refrigerant used. EHCU electronics module. Replace the high pres- 2. Check 4-way diverter valve: sure sensor if necessary. ■...
  • Page 126 Messages Fault messages (cont.) 7. Check fan operating point. If there is e.g. too much back pressure due to wind, correct the operating point. Allow the outdoor unit to cool down. 8. Reset the fault message: Switch power off for at least 25 s.
  • Page 127 Messages Fault messages (cont.) F.823 Short circuit, expansion valve 1 F.823 3. Check electronic expansion valve 1 via actuator test. System characteristics 4. Check resistor R for 20 °C on disconnected plug of electronic expansion valve 1: The refrigerant circuit will not start. On all 4 coils of the stator between pin 5 and pin 1 to 4 in each case: If R <...
  • Page 128 Messages Fault messages (cont.) Measures 3. Check phase connections for compressor for clock- wise rotating field. 1. Isolate the system from the power supply. Wait at 4. Replace inverter. least 2 min. Switch on the system. 2. Check all connections to the compressor: Check wires and plugs for correct seating.
  • Page 129 Messages Fault messages (cont.) Measures 1. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. 2. Replace inverter. F.834 Inverter phase fault on mains side F.834 3. Check for correct connection of power-OFF signal: Without on-site load disconnect: ■...
  • Page 130 Messages Fault messages (cont.) 4. Replace inverter. 5. Replace compressor. Inform Viessmann Technical Service if necessary. F.837 Inverter electric phase connection to compressor faulty F.837 3. Check for correct connection of power-OFF signal: ■ Without on-site load disconnect: System characteristics...
  • Page 131 Messages Fault messages (cont.) 7. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. 8. Replace compressor. F.840 Inverter phase currents to compressor asymmetrical F.840 3. Check the winding resistances of the compressor stator for symmetry.
  • Page 132 Messages Fault messages (cont.) F.843 Inverter overcurrent shutdown, power factor correction filter (PFC) F.843 3. Check VCMU refrigerant circuit controller power supply. System characteristics 4. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. Refrigerant circuit off: Inverter and compressor cannot 5.
  • Page 133 7. Check instantaneous heating water heater. Replace if necessary. Defrost process aborted 9 times 8. Check the external heat generator (if installed). 9. Inform Viessmann Technical Service. Measures 10. Unlock refrigerant circuit via ViGuide. 1. Check the evaporator for dirt. Clean if necessary. If necessary, carefully de-ice mechanically.
  • Page 134 Messages Fault messages (cont.) F.865 Refrigerant circuit high pressure shutdown F.865 Measures System characteristics 1. Ensure that all Schrader valves are open. 2. If necessary, vent secondary circuit. Check secon- Refrigerant circuit off dary circuit pump for dirt (impeller) and correct func- tion.
  • Page 135 Measures 1. Isolate the system from the power supply. Wait at least 2 min. Switch on the system. 2. Check inverter safety circuit for correct function. F.909 No information on Viessmann Energy Management (HEMS) F.909 Cause System characteristics ■...
  • Page 136 Messages Fault messages (cont.) Measures 1. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings if required. 2. If necessary repeat commissioning. 3. Inform Viessmann Technical Service. F.910 Multiple main appliances recognised F.910 Measures System characteristics Check configuration of all CAN bus subscribers in the system network.
  • Page 137 1. Check the software version of the energy meter. Run software update if required. 2. Check CAN bus connection to energy meter. 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings if required. 4. Read out and check the ID numbers from Viessmann Technical Service.
  • Page 138 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 139 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 140 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 141 No information on Viessmann Energy Management 2. Check CAN bus connection to inverter. (HEMS) available in ViCare or ViGuide 3. Check settings for Viessmann energy management (HEMS) in commissioning assistant. Adjust settings Cause if required. 4. Read out and check the ID numbers from Data from inverter 3 not available, e.g.
  • Page 142 Data from consumer 1 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 143 Data from consumer 4 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 144 Data from consumer 7 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 145 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 146 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 147 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 148 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 149 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 150 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 151 Messages Fault messages (cont.) F.984 Multiple electrical fault, control of electronic expansion valve 1 F.984 3. Check electronic expansion valve 1 via actuator test. System characteristics 4. Check resistor R for 20 °C on disconnected plug of electronic expansion valve 1: The refrigerant circuit will not start.
  • Page 152 Messages Fault messages (cont.) F.990 Short circuit, low loss header temperature sensor F.990 Measures System characteristics 1. Check the sensor at the following connections: ■ Terminals X17.1/X17.2 on EHCU electronics mod- Secondary circuit operating in unregulated mode ■ Wall mounted indoor unit: Cause 6-pole connection socket on underside of appli- ance on left, terminals 5 and 6...
  • Page 153 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 154 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 155 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 156 Messages Fault messages (cont.) Measures 1. Check whether there are any further messages. Take action as necessary depending on further mes- sages. 2. Check the CAN bus connection between the EHCU electronics module and the VCMU refrigerant circuit controller: ■ Floorstanding indoor unit: Connection to luster terminals for BUS connec- tions, terminals 72.3 to 72.5...
  • Page 157 System characteristics ■ Max. number of 15 additional CAN bus subscribers (e.g. slave heat pump and/or other Viessmann appli- The most recently connected additional CAN bus sub- ances) has been exceeded. scriber is not recognised by the (master) heat pump Further messages: I.96, I.97, I.98...
  • Page 158 Fault messages (cont.) Measures 1. Check the number of additional CAN bus subscrib- ers (e.g. slave heat pump and/or other Viessmann appliances). 2. Disconnect the unsupported CAN bus subscriber from the CAN bus system. 3. Check whether this disconnected CAN bus sub- scriber can be connected to a main appliance in another CAN bus system.
  • Page 159 Messages Fault messages (cont.) F.1012 Fault, low pressure sensor, refrigerant circuit F.1012 Measures System characteristics 1. Check the low pressure sensor and connec- tions X14.4 to X14.6 on the VCMU refrigerant circuit Refrigerant circuit off controller: ■ Check wires and plugs for correct seating. Cause Check connections for contact corrosion.
  • Page 160 Messages Fault messages (cont.) F.1035 Communication fault, internal CAN bus F.1035 3. Replace CAN bus cable. 4. Replace HPMU electronics module. System characteristics Limited normal operation Cause ■ Short circuit, internal CAN bus ■ Connections 72.CAN L/72.CAN H interchanged Measures 1.
  • Page 161 Messages Fault messages (cont.) Measures 3. Check whether the external 3/2-way mixing valve opens and closes. 1. Check configuration of external heat generator. 4. Check resistor R for NTC 10 k on disconnected Ω 2. Check the following connections to the HIO elec- plug TS1.
  • Page 162 Messages Fault messages (cont.) F.1056 Faulty relay, inverter intermediate circuit F.1056 Measures System characteristics 1. Isolate the outdoor unit from the power supply. Wait at least 2 min. Switch on voltage again. Heat pump off 2. Replace inverter. Cause Inverter relay faulty F.1057 Fault, high pressure sensor, refrigerant circuit F.1057 Measures...
  • Page 163 Messages Fault messages (cont.) 6. Check oil sump temperature sensor: 7. Inform Viessmann Technical Service if necessary. ■ Check connection X20.3/X20.4 on the 8. Unlock refrigerant circuit via ViGuide. VCMU refrigerant circuit controller: – Check wires and plugs for correct seating.
  • Page 164 F.1105 Cooling function for heating/cooling circuit 1 is not supported by extension module F.1105 Measures System characteristics 1. Use a suitable extension for cooling function: See Viessmann pricelist. Room cooling via heating/cooling circuit 1 not available 2. Run the commissioning assistant. Commission the extension. Cause Connected extension (electronics module) does not support cooling function.
  • Page 165 5. Inform Viessmann Technical Service. F.1131 Network fault (LAN) F.1131 Measures System characteristics 1. Check messages of Viessmann Energy Manage- ment (HEMS) via ViGuide. ■ Limited functionality of Viessmann Energy Manage- 2. Check LAN cable and plug-in connection between ment (HEMS)
  • Page 166 F.1132 Measures System characteristics 1. Check settings for Vitocharge VX3. Adjust if neces- sary: The optimisation functions of Viessmann Energy Man- ■ Mode setting: Dynamic agement (HEMS) are deactivated, but are configured ■ In-feed limit corresponds to the peak load of the for Vitocharge VX3.
  • Page 167 Messages Fault messages (cont.) 5. Switch on the system. 7. Replace inverter. 6. Check the 3 phase currents on the compressor. If 8. Replace compressor. the phase currents differ from one another, check the rotating field. Replace phase connections if nec- essary.
  • Page 168 Messages Fault messages (cont.) 4. Check the entire safety chain. 5. Reload parameter file for inverter. F.1179 Internal safety shutdown, inverter, due to mains side phase fault F.1179 3. Check the cable and connections to the inverter: ■ Check wires and plugs for correct seating. System characteristics ■...
  • Page 169 Messages Fault messages (cont.) F.1182 Safety shutdown, thermal overload protection, compressor F.1182 3. Check connections U, V, W on the inverter: Check wires and plugs for correct seating. ■ System characteristics ■ Check connections for contact corrosion. ■ Check cables for mechanical damage, e.g. crush- ■...
  • Page 170 Messages Fault messages (cont.) Measures 1. Check all cables connected to inverter: ■ 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. Replace cable if necessary. 2.
  • Page 171 Messages Fault messages (cont.) Measures 3. Isolate the outdoor unit from the power supply. Wait at least 2 min. Switch on voltage again. 1. Check connection X1.3/X1.4 (STO1) on the inverter: 4. Replace inverter. ■ Check wires and plugs for correct seating. 5.
  • Page 172 Messages Fault messages (cont.) Measures 3. Isolate the outdoor unit from the power supply. Wait at least 2 min. Switch on voltage again. 1. Check all cables connected to the compressor: 4. Replace inverter. ■ Check wires and plugs for correct seating. ■...
  • Page 173 Replace cable if necessary. 2. Have parameters of compressor checked by Thermal overload of the compressor after multiple Viessmann Technical Service. start-ups 3. Isolate the outdoor unit from the power supply. Wait at least 2 min. Switch on voltage again.
  • Page 174 Messages Fault messages (cont.) F.1259 Modbus communication fault, refrigerant circuit controller (VCMU) to inverter F.1259 3. Check the power supply at plug X1 on the VCMU refrigerant circuit controller. System characteristics 4. Replace VCMU refrigerant circuit controller. 5. Replace inverter. Refrigerant circuit off Cause No communication between inverter and heat pump...
  • Page 175 DHW cylinder volume may be too large A.19 Temperature limiter has responded A.19 Measures System characteristics 1. No action required 2. If the message appears often: Inform Viessmann Heat pump temporarily off Technical Service. Cause Temperature limiter has responded. A.21 Hydraulic system pressure A.21...
  • Page 176 A.66 Heating circuit pump for heating/cooling circuit 1 not running A.66 Cause System characteristics ■ No PWM signal, secondary pump/heating circuit pump, heating/cooling circuit 1 Secondary pump/heating circuit pump, heating/cooling ■ Incorrect circulation pump installed circuit 1 not running. Measures Use only spare parts supplied or approved by Viessmann.
  • Page 177 A.68 Heating circuit pump for heating/cooling circuit 2 not running A.68 Measures System characteristics Use only spare parts supplied or approved by Viessmann. Heating circuit pump, heating/cooling circuit 2 not run- ning. Cause ■ No PWM signal, heating circuit pump, heating/cool- ing circuit 2 ■...
  • Page 178 Messages Warning messages (cont.) A.73 Frequency deviation, compressor speed A.73 Measures System characteristics No action required Compressor temporarily off Cause Frequency deviation between actual and set compres- sor speed A.74 Pressure drop in secondary circuit A.74 Measures System characteristics 1. Check the expansion vessel. 2.
  • Page 179 Messages Warning messages (cont.) A.81 Insufficient heat transfer, evaporator A.81 Cause System characteristics Insufficient heat transfer in evaporator ■ Performance factor (COP) too low Measures ■ Compressor output too low Refrigerant circuit off Check evaporator. Clean if necessary. ■ A.82 Fault, pressure sensor, CAN bus subscriber A.82 Measures System characteristics...
  • Page 180 Messages Warning messages (cont.) A.85 Signal, flow temperature sensor, secondary circuit A.85 Measures System characteristics Check resistor R for NTC 10 k on the disconnected Ω plug. Replace sensor if required. Limited control of refrigerant circuit Connection: X15.3/X15.4 on the VCMU refrigerant cir- cuit controller Cause Signal of flow temperature sensor in secondary circuit...
  • Page 181 Messages Warning messages (cont.) A.93 Hot gas pressure not plausible A.93 Measures System characteristics 1. Check high pressure sensor: With the system running, measure the voltage U Refrigerant circuit operation impaired from 0 to 5 V at connection X14.2/X14.3 of the VCMU refrigerant circuit controller.
  • Page 182 Messages Warning messages (cont.) A.100 Settings deleted A.100 Measures System characteristics 1. No action required 2. If the message appears often: Replace electronics Settings on the heat pump control unit deleted modules. Cause Data memory on the electronics modules faulty A.101 Hot gas temperature not plausible A.101 Measures...
  • Page 183 Messages Warning messages (cont.) A.110 Temperature of external heat generator 1 A.110 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 184 Messages Warning messages (cont.) A.159 Factory setting, inverter A.159 Measures System characteristics No action required Compressor temporarily off Cause Factory settings for the inverter have been restored. A.162 Inverter overvoltage, intermediate circuit A.162 Measures System characteristics No action required Compressor temporarily off Cause Inverter reports overvoltage in the intermediate circuit.

  • Page 185: Service Messages

    Messages Warning messages (cont.) A.174 Interior temperature too high A.174 Measures System characteristics 1. Check inverter heat sink and fan for dirt. Clean if necessary. ■ Reduced heating output/cooling capacity 2. Replace the fan. ■ Interior temperature too high 3. Replace inverter. Cause Inverter cooling faulty (fan) Service messages...
  • Page 186 Messages Status messages (cont.) Message Meaning 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 4/3-way valve idle S.135 4/3-way valve defrosting S.136...
  • Page 187 Messages Status messages (cont.) Message Meaning 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 Heat demand, heating/cooling circuit 4 S.204 Cooling demand for heating/cooling circuit 4...

  • Page 188: Information Messages

    Messages Status messages (cont.) Message Meaning 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 Passive frost protection: ■ With passive frost protection, only the heating water is circulated with the help of the secondary circula- tion pumps.
  • Page 189 Current too high in power factor correction filter (PFC) ■ Compressor temporarily off ■ Measures: 1. If the message appears often, inform Viessmann Technical Service. I.78 Inverter: Output reduction by inverter if output demand is too high (derating) I.79 Inverter: Output reduction by inverter if output demand from compressor is too high (derating) ■...
  • Page 190 Messages Information messages (cont.) Message Meaning I.107 Max. condensing temperature reached I.108 Max. compressor torque reached 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...
  • Page 191 ■ Compressor temporarily off ■ Measures: 1. Check temperature at the interior temperature sensor. If possible, increase the temperature. 2. Inform Viessmann Technical Service. I.176 Compressor with reduced output: Ambient temperature is higher than permissible operating temperature for compressor. I.182...

  • Page 192: 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 193 Appendix CAN bus cable (cont.) This is why a distinction is made within a CAN bus sys- Last CAN bus subscriber tem as to whether a CAN bus subscriber is the first, Connection with terminator last or central subscriber: CAN bus cable ■...
  • Page 194 Appendix Temperature sensors (cont.) Temperature sensor NTC 10 k Connection Ω Wall mounted indoor unit Floorstanding indoor unit Outside temperature sensor 6-pin 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 195 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 196 Appendix Temperature sensors (cont.) NTC 10 k (no marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k ϑ...

  • Page 197: Pressure Sensors

    Appendix Pressure sensors Water pressure sensor in the indoor unit 0.45 Pressure Fig. 29 Pressure sensors in the outdoor unit Pressure Fig. 30 Low pressure sensor High pressure sensor Status display, internal circulation pumps Fig. 31...
  • Page 198 Appendix Status display, internal circulation pumps (cont.) Meaning Flashes Normal operation, circulation pump green. runs on demand. Steady Circulation pump runs continuously ■ green. at maximum output, e.g. when the PWM signal is interrupted. No fault message ■ Steady red. Fault with fault message ■...
  • Page 199 Certificates Declarations of Conformity for the heat pump We, Viessmann Climate Solutions SE, D-35108 Allen- dorf, 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 200 – Fault................ 99 – Information............188 – Notes...............98 – Service..............185 – Status..............185 – Warning..............174 Viessmann Australia Local Office A Carrier Company Address: PO Box 497, Brighton Vic 3186 Email address: info.australia@viessmann.com Contact Number: +61 1300 734 170 Website: www.viessmann.com.au...

This manual is also suitable for:

Vitocal 151-aVitocal 250-aVitocal 252-a

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