Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 7

Index
4. Commissioning, inspec-
tion, maintenance
5. System configuration
(parameters)
6. Diagnosis and service
checks
7. Troubleshooting
8. Function description
Fitting the front panels of the gas condensing and fuel cell module ...... 50
Fitting the programming unit ............................................................... 50
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Fitting the cylinder module front panel ................................................... 51
Splitting the gas condensing and fuel cell modules ............................... 52
Reassemble the gas condensing and fuel cell module in reverse
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order. .................................................................................................. 54
Steps - commissioning, inspection and maintenance ............................ 55
Calling up parameters ............................................................................ 90
General .................................................................................................. 90
Boiler ...................................................................................................... 92
DHW ...................................................................................................... 94
Heating circuit 1, Heating circuit 2, Heating circuit 3, Heating circuit 4 .. 96
Fuel cell ................................................................................................. 102
Subscriber numbers of the connected extensions .................................104
Gas condensing module ........................................................................ 106
Service menu ......................................................................................106
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Changing the service password ......................................................... 106
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Resetting all passwords to delivered condition ...................................107
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Diagnosis ............................................................................................ 107
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Calling up messages (message history) .............................................107
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Checking outputs (actuator and sensor test) ...................................... 108
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Fuel cell module .....................................................................................110
Checking power generated ................................................................. 110
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Checking the gas consumption to reclaim fuel tax ............................. 110
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Checking operating condition ............................................................. 110
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Checking grid monitoring parameters ................................................. 111
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Removing the SD card ....................................................................... 111
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Inserting the SD card and saving the fuel cell module data ............... 112
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Fault display and other messages on the programming unit ................. 113
Fault messages on the gas condensing module/fuel cell module pro-
gramming unit ........................................................................................ 115
Service messages ................................................................................. 135
Warnings ................................................................................................136
Repairs .................................................................................................. 136
Moving the programming unit to the service position ......................... 136
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Draining the system on the heating water and DHW sides ................ 137
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Checking the temperature sensors .....................................................140
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Information on replacing the HMU heat management unit and BCU
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burner control unit ...............................................................................142
Checking the cylinder loading plate heat exchanger .......................... 142
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Checking the system separation plate heat exchanger ...................... 142
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Removing the flow sensor .................................................................. 143
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Removing the hydraulic unit ............................................................... 144
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Replacing the power cable ................................................................. 144
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Checking the fuse ............................................................................... 145
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Mixer extension kit .............................................................................. 145
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Control unit ............................................................................................ 147
Heating mode ..................................................................................... 147
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Heating the loading cylinder ............................................................... 147
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Operating the fuel cell module ............................................................ 147
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Connection, heating circuit pump for heating circuit without mixer ........147
External extensions (accessories) ......................................................... 148
EM-EA1 extension .............................................................................. 148
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Control functions ....................................................................................148
Venting program ................................................................................. 148
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Index
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