Viessmann B2HF - Page 7

7
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Checking operating data ..................................................................... 81
Calling up messages (message history) ................................................ 82
Checking outputs (actuator test) ............................................................ 82
7. Troubleshooting Fault display on the programming unit ................................................... 85
Overview of electronics modules ........................................................... 86
Fault messages ..................................................................................... 87
Repairs .................................................................................................. 103
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Shutting down the boiler ..................................................................... 103
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Removing the boiler from the pre-plumbing jig or mounting frame .....104
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Checking the temperature sensors .....................................................105
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Information on replacing the HMU heat management unit and BCU
burner control unit ...............................................................................109
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Replacing the power cable ................................................................. 109
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Replacing the HMI connecting cable .................................................. 109
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Checking the plate heat exchanger .................................................... 109
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Removing the hydraulic unit ............................................................... 110
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Checking the fuse ............................................................................... 112
8. Function description Appliance functions ................................................................................113
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Heating mode ..................................................................................... 113
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Venting program ................................................................................. 113
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Filling program .................................................................................... 113
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Heating curve ..................................................................................... 113
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Screed drying ..................................................................................... 115
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Raising the reduced room temperature .............................................. 117
DHW heating ......................................................................................... 119
Increased DHW hygiene ........................................................................ 119
Interval function, solar circuit pump ....................................................... 120
External heating circuit hook-up (if installed) ......................................... 120
9. Connection and wiring dia-
gram
HMU heat management unit ..................................................................121
BCU burner control unit ......................................................................... 123
10. Commissioning/service
reports
................................................................................................................124
11. Specification Specification .......................................................................................... 125
Electronic combustion control unit ......................................................... 129
12. Disposal Final decommissioning and disposal ..................................................... 130
13. Certificates Declaration of conformity ....................................................................... 131
Manufacturer's certificate according to the 1st BImSchV [Germany] .... 131
14. Keyword index ................................................................................................................132
Index
Index (cont.)
5593201