Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 6

Index
Index
9. Diagnosis and service
scans
10. Troubleshooting
11. Maintenance
12. Extension kit for heating
circuit with mixer
13. Connection and wiring dia-
gram
6
Buffer cylinder group .............................................................................. 47
Coding ................................................................................................ 47
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DHW group ............................................................................................ 47
Coding ................................................................................................ 47
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Service functions ................................................................................... 48
Calling up the service menu ............................................................... 48
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Exiting the service menu .................................................................... 48
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Diagnosis ............................................................................................... 48
Diagnosis: General sub-menu ............................................................ 48
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Diagnosis: Boiler sub-menu ................................................................ 49
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Diagnosis: Heating sub-menu ............................................................ 49
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Diagnosis: DHW sub-menu ................................................................ 49
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Diagnosis: KM BUS sub-menu ........................................................... 49
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Calling up operating conditions and sensors ......................................... 50
Fault display ........................................................................................... 51
Checking and acknowledging faults ................................................... 51
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Calling up acknowledged fault messages .......................................... 51
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Plain text fault display ......................................................................... 51
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Calling up fault codes from the fault memory (fault history) ............... 51
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Deleting the fault codes from the fault memory .................................. 52
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Fault codes ......................................................................................... 52
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Fuse ....................................................................................................... 55
Battery ................................................................................................... 55
High limit safety cut-out (STB) ............................................................... 55
Triggering the function ........................................................................ 55
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Cancelling the function ....................................................................... 55
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Sensors .................................................................................................. 56
Connection ......................................................................................... 56
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Carrying out an actuator test ................................................................. 56
Checking sensors .................................................................................. 57
Lambda probe ........................................................................................ 58
Connection ......................................................................................... 58
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Specification ....................................................................................... 58
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Extension kit components ...................................................................... 59
Specification .......................................................................................... 59
Mixer motor ............................................................................................ 60
Changing the rotational direction (if required) .................................... 60
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PCB KSK 2.01b ..................................................................................... 61
Connections ........................................................................................... 62
230 V connection ................................................................................ 62
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LV connection ..................................................................................... 63
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230 V plugs ............................................................................................ 64
Plug ............................................................................................... 64
fA
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Plug ............................................................................................. 64
aBA
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Plug X1 ............................................................................................... 65
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Plug ............................................................................................. 66
aBÖ
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LV plugs ................................................................................................. 66
Plug : Lambda probe .................................................................... 66
a:K
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Plug : Flow temperature sensor ..................................................... 67
?
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Plug : Return temperature sensor .................................................. 67
aJ
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Plug , and ........................................................................... 67
! aG aNL
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Plug : Buffer cylinder sensor .......................................................... 68
)
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Plug : KM BUS .............................................................................. 68
aVG
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Plug X15: CAN BUS ........................................................................... 69
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Plug A: Fan ................................................................................... 69
a¢Ö
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