Viessmann VITOCAL 250-A - Page 19

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F.1140 Lead heat pump off ................................................................. 166
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F.1172 Inverter recognises asymmetrical compressor currents ..........166
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F.1173 Maximum number of inverter safety shutdowns interlock
input 1 reached ................................................................................... 167
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F.1174 Forced safety shutdown, compressor - interlock input 2
active .................................................................................................. 167
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F.1175 Maximum number of inverter safety shutdowns interlock
input 2 reached ...................................................................................167
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F.1179 Internal safety shutdown, inverter, due to mains side phase
fault .....................................................................................................168
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F.1180 Inverter, safety-relevant internal earth fault .............................168
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F.1181 Safety shutdown, compressor, due to superimposed direct
current ................................................................................................ 168
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F.1182 Safety shutdown, thermal overload protection, compressor ... 169
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F.1183 Fault, compressor start-up ...................................................... 169
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F.1184 Fault, mains voltage measurement, inverter ........................... 169
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F.1186 Offset error, inverter current sensor ........................................ 170
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F.1187 Fault, inverter current sensor outside the valid range ............. 170
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F.1191 Fault, sensor interlock input 1 ................................................. 170
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F.1192 Fault, sensor interlock input 2 ................................................. 171
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F.1194 Inverter overcurrent, internal power module ........................... 171
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F.1195 Fault, overload, inverter .......................................................... 171
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F.1196 Fault, analogue/digital converter, inverter ............................... 172
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F.1216 Loss of communication with the lead heat pump ....................172
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F.1217 Loss of communication with the lag heat pump ......................173
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F.1254 Safety shutdown, thermal overload protection, compressor if
the compressor starts up several times .............................................. 173
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F.1259 Modbus communication fault, refrigerant circuit controller
(VCMU) to inverter ..............................................................................174
Warning messages ................................................................................ 174
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A.2 Frost protection limit undershot .................................................... 174
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A.11 System pressure too low ............................................................ 174
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A.12 Battery in the HPMU electronics module ................................... 175
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A.16 Minimum flow rate undershot ..................................................... 175
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A.17 Increased DHW hygiene ............................................................ 175
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A.19 Temperature limiter has responded ............................................175
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A.21 Hydraulic system pressure ......................................................... 175
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A.62 PWM signal, heating circuit pump, heating/cooling circuit 1 ...... 176
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A.63 PWM signal, heating circuit pump, heating/cooling circuit 2 ...... 176
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A.65 Heating circuit pump for heating/cooling circuit 2 running dry ....176
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A.66 Heating circuit pump for heating/cooling circuit 1 not running ....176
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A.68 Heating circuit pump for heating/cooling circuit 2 not running ....177
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A.70 Filter in ball valve, outdoor unit .................................................. 177
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A.71 Excess current at compressor ....................................................177
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A.72 Current, power factor correction filter ......................................... 177
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A.73 Frequency deviation, compressor speed ................................... 178
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A.74 Pressure drop in secondary circuit ............................................. 178
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A.75 Pressure spikes in secondary circuit .......................................... 178
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A.80 Fan blocked ................................................................................178
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A.81 Insufficient heat transfer, evaporator .......................................... 179
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A.82 Fault, pressure sensor, CAN bus subscriber ..............................179
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A.83 Signal, cylinder temperature sensor faulty ................................. 179
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A.84 Signal, return temperature sensor, secondary circuit ................. 179
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A.85 Signal, flow temperature sensor, secondary circuit .................... 180
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A.86 Signal, flow temperature sensor, heating/cooling circuit 1 ......... 180
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A.87 Signal, flow temperature sensor, heating/cooling circuit 2 ......... 180
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A.91 Refrigerant circuit temporarily off ............................................... 180
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A.93 Hot gas pressure not plausible ...................................................181
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A.94 Suction gas pressure not plausible ............................................ 181
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A.96 Air in the secondary circuit ......................................................... 181
Index
Index
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