Viessmann Vitocal 250-A (One Base, monobloc)

Viessmann · Heat pumps · 165 codes · 43 with plain-language explanation

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Viessmann Vitocal 250-A: water pressure too low or too high, and the air vent alarm
The manual explains the pressure messages and the air vent alarm and what the user may do before calling the installer.
Viessmann Vitocal 250-A: where to read a fault message and what to tell the installer
The manual explains where fault messages are shown and which information to pass on to the installer.

Error codes

Filter codes

A.100 Data memory on the electronics modules faulty source text only
A.101 Values for hot gas temperature in relation to hot gas pressure not plausible source text only
A.102 Values for suction gas temperature in relation to suction gas pressure not plausible source text only
A.11 System pressure too low with plain-language explanation
A.12 Battery in HPMU electronics module flat. with plain-language explanation
A.16 Minimum flow rate undershot with plain-language explanation
A.17 Temperature for increased DHW hygiene is not reached; DHW cylinder volume may be too large with plain-language explanation
A.2 Outside temperature has undershot the specified frost protection limit. with plain-language explanation
A.21 Hydraulic system pressure too high with plain-language explanation
A.62 Lead break, PWM signal, secondary pump/heating circuit pump, heating/cooling circuit 1 source text only
A.63 Lead break, PWM signal, heating circuit pump, heating/cooling circuit 2 source text only
A.65 Heating circuit pump, heating/cooling circuit 2 running dry. with plain-language explanation
A.66 No PWM signal, secondary pump/heating circuit pump, heating/cooling circuit 1; incorrect circulation pump installed source text only
A.68 No PWM signal, heating circuit pump, heating/cooling circuit 2; incorrect circulation pump installed source text only
A.70 Filter in ball valve of outdoor unit is contaminated with plain-language explanation
A.71 Excess current on compressor source text only
A.72 Current of power factor correction filter too high source text only
A.73 Frequency deviation between actual and set compressor speed source text only
A.74 Pressure drop in secondary circuit with plain-language explanation
A.75 Pressure spikes in secondary circuit source text only
A.80 Fan blocked with plain-language explanation
A.81 Insufficient heat transfer in evaporator with plain-language explanation
A.82 Fault through internal monitoring of the pressure sensors of the affected CAN bus subscriber source text only
A.83 Cylinder temperature sensor signal faulty source text only
A.84 Return temperature sensor signal faulty source text only
A.85 Cylinder temperature sensor signal faulty source text only
A.86 Faulty signal, flow temperature sensor, secondary circuit or heating/cooling circuit 1 source text only
A.87 Faulty signal, flow temperature sensor, heating/cooling circuit 2 source text only
A.91 Outside temperature too low for heat pump operation; Operation without outdoor unit, for example for screed drying; Fault refrigerant circuit with plain-language explanation
A.93 Values for hot gas pressure in relation to hot gas temperature not plausible source text only
A.94 Values for suction gas pressure in relation to suction gas temperature not plausible source text only
A.96 Air in the secondary circuit with plain-language explanation
A.99 Flow temperature in secondary circuit downstream of condenser too low with plain-language explanation
F.1 Lead break, flow temperature sensor, secondary circuit or heating/cooling circuit 1 with plain-language explanation
F.100 Short circuit, PlusBus source text only
F.1009 Fault, oil sump heater source text only
F.101 PlusBus voltage error source text only
F.1010 Fault, secondary circuit pressure sensor source text only
F.1011 Fault, high pressure sensor source text only
F.1012 Fault, low pressure sensor source text only
F.102 Communication error, Wi-Fi communication module with plain-language explanation
F.103 HMI programming unit communication error with plain-language explanation
F.104 External fault message input active source text only
F.1045 Fault on external heat generator source text only
F.1049 3/2-way mixing valve not switching. source text only
F.1050 Short circuit, boiler water temperature sensor, external heat generator source text only
F.1051 Lead break, boiler water temperature sensor, external heat generator source text only
F.1054 Max. temperature of external heat generator exceeded source text only
F.1056 Inverter relay faulty source text only
F.111 Lead break, liquid gas temperature sensor, heating source text only
F.112 Short circuit, liquid gas temperature sensor, heating source text only
F.117 Lead break, evaporator suction gas temperature sensor source text only
F.118 Short circuit, evaporator suction gas temperature sensor source text only
F.123 Lead break, liquid gas temperature sensor, condenser source text only
F.124 Short circuit, liquid gas temperature sensor, condenser source text only
F.13 Lead break, outside temperature sensor with plain-language explanation
F.14 Short circuit, outside temperature sensor with plain-language explanation
F.147 Lead break, compressor suction gas temperature sensor source text only
F.148 Short circuit, compressor suction gas temperature sensor source text only
F.149 Lead break, liquid gas temperature sensor, cooling source text only
F.150 Short circuit, liquid gas temperature sensor, cooling source text only
F.151 Lead break, hot gas temperature sensor source text only
F.152 Short circuit, hot gas temperature sensor source text only
F.155 Fault, electronic expansion valve 1 source text only
F.156 Fault, electronic expansion valve 2 source text only
F.160 CAN bus general communication fault between the affected electronics modules with plain-language explanation
F.2 Short circuit, flow temperature sensor, secondary circuit or heating/cooling circuit 1 with plain-language explanation
F.3 Lead break, secondary circuit return temperature sensor source text only
F.33 Lead break, air inlet temperature sensor source text only
F.34 Short circuit, air inlet temperature sensor source text only
F.4 Short circuit, secondary circuit return temperature sensor with plain-language explanation
F.425 Time synchronisation not possible source text only
F.430 Communication error, gateway source text only
F.431 KNX/TP gateway communication error source text only
F.454 Incorrect version of operating software for the electronics modules with plain-language explanation
F.472 Communication error, energy meter with plain-language explanation
F.519 BACnet/IP gateway communication error source text only
F.520 Communication error, Modbus source text only
F.542 Lead break, flow temperature sensor, heating/cooling circuit 1 with mixer source text only
F.543 Short circuit, flow temperature sensor, heating/cooling circuit 1 with mixer source text only
F.544 Lead break, flow temperature sensor, heating/cooling circuit 2 with mixer source text only
F.545 Short circuit, flow temperature sensor, heating/cooling circuit 2 with mixer source text only
F.546 Lead break, flow temperature sensor, heating/cooling circuit 3 with mixer source text only
F.547 Short circuit, flow temperature sensor, heating/cooling circuit 3 with mixer source text only
F.548 Lead break, flow temperature sensor, heating/cooling circuit 4 with mixer source text only
F.549 Short circuit, flow temperature sensor, heating/cooling circuit 4 with mixer source text only
F.623 Lead break, return temperature sensor source text only
F.624 Short circuit, return temperature sensor source text only
F.625 Lead break, return temperature sensor, heating/cooling circuit 2 source text only
F.626 Short circuit, return temperature sensor, heating/cooling circuit 2 source text only
F.627 Lead break, return temperature sensor, heating/cooling circuit 3 source text only
F.628 Short circuit, return temperature sensor, heating/cooling circuit 3 source text only
F.629 Lead break, return temperature sensor, heating/cooling circuit 4 source text only
F.630 Short circuit, return temperature sensor, heating/cooling circuit 4 source text only
F.685 HPMU electronics module communication error with plain-language explanation
F.686 VCMU refrigerant circuit controller communication error source text only
F.687 EHCU electronics module communication error source text only
F.7 Lead break, cylinder temperature sensor source text only
F.74 Hydraulic system pressure too low with plain-language explanation
F.75 No flow in the secondary circuit, or flow sensor faulty with plain-language explanation
F.770 Lead break, flow temperature sensor, secondary circuit downstream of condenser source text only
F.771 Short circuit, flow temperature sensor, secondary circuit downstream of condenser source text only
F.772 Lead break, oil sump temperature sensor source text only
F.773 Short circuit, oil sump temperature sensor source text only
F.788 Fault, control and/or power supply of 4/3-way valve source text only
F.790 Motor of 4/3-way valve not correctly mounted; 4/3-way valve faulty source text only
F.791 Phase L1 in power supply of instantaneous heating water heater not present with plain-language explanation
F.792 Phase L2 in power supply of instantaneous heating water heater not present source text only
F.793 Phase L3 in power supply of instantaneous heating water heater not present source text only
F.797 Secondary pump/heating circuit pump, heating/cooling circuit 1 is faulty with plain-language explanation
F.798 Heating circuit pump, heating/cooling circuit 2 is faulty with plain-language explanation
F.799 Secondary pump/heating circuit pump, heating/cooling circuit 1 is faulty source text only
F.8 Short circuit, cylinder temperature sensor with plain-language explanation
F.800 Heating circuit pump, heating/cooling circuit 2 is faulty source text only
F.801 4-way diverter valve faulty source text only
F.808 Lower fan not running. with plain-language explanation
F.812 Upper fan not running. with plain-language explanation
F.819 Lead break, electronic expansion valve 1 source text only
F.820 Lead break, electronic expansion valve 2 source text only
F.823 Short circuit, electronic expansion valve 1 source text only
F.824 Short circuit, electronic expansion valve 2 source text only
F.827 High limit safety cut-out has responded. with plain-language explanation
F.829 Filter in ball valve of outdoor unit is contaminated with plain-language explanation
F.830 Power supply on inverter faulty source text only
F.831 Power supply on inverter faulty source text only
F.832 Inverter temperature sensor faulty source text only
F.833 Inverter temperature sensor faulty source text only
F.834 Power supply on inverter faulty source text only
F.835 Unsuitable inverter or inverter incorrectly programmed source text only
F.836 Overvoltage fault on inverter source text only
F.837 Power supply on compressor faulty source text only
F.838 Control of inverter faulty source text only
F.839 Compressor blocked with plain-language explanation
F.841 Excessive compressor torque; Compressor power consumption high source text only
F.843 Overvoltage shutdown, inverter source text only
F.845 Unsuitable inverter or inverter incorrectly programmed source text only
F.846 Compressor rotating field counter-rotating source text only
F.847 Voltage error on inverter source text only
F.848 Voltage error on inverter source text only
F.864 Outdoor unit defrost attempt unsuccessful with plain-language explanation
F.865 High pressure fault with plain-language explanation
F.866 Low pressure fault with plain-language explanation
F.867 Float air vent valve in the outdoor unit has responded with plain-language explanation
F.87 Hydraulic system pressure too high with plain-language explanation
F.876 Lead break, flow sensor source text only
F.881 Refrigerant circuit safety shutdown with plain-language explanation
F.91 DIO electronics module communication error source text only
F.912 Interior temperature sensor fault source text only
F.913 Interior temperature too high with plain-language explanation
F.92 ADIO electronics module communication error source text only
F.93 M2IO electronics module communication error source text only
F.94 SDIO electronics module communication error source text only
F.983 Internal inverter fault source text only
F.984 Control of electronic expansion valve 1 faulty source text only
F.985 Control of electronic expansion valve 2 faulty source text only
F.99 Communication error PlusBus source text only
F.990 Short circuit, temperature sensor source text only
F.991 Lead break, temperature sensor source text only
F.992 Short circuit, temperature sensor of external heating water/coolant buffer cylinder source text only
F.993 Lead break, temperature sensor of external heating water/coolant buffer cylinder source text only
F.994 Short circuit, temperature sensor of external heating water buffer cylinder source text only
F.995 Lead break, temperature sensor of external heating water buffer cylinder source text only
F.996 Short circuit, temperature sensor of external coolant buffer cylinder source text only
F.997 Lead break, temperature sensor of external coolant buffer cylinder source text only
F.998 Flow rate signal faulty source text only

Viessmann Vitocal 250-A (One Base, monobloc)

Guides

Error codes

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