Viessmann Vitodens 242-F Installation And Service Instructions Manual page 5

Index
7. Diagnosis and service
scans
8. Troubleshooting
9. Function description
10. Designs
11. Parts lists
Service menu ......................................................................................... 89
Calling up the service menu ............................................................... 89
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Exiting the service menu .................................................................... 89
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Diagnosis ............................................................................................... 89
Calling up operating data .................................................................... 89
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Brief scan ............................................................................................ 90
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Checking outputs (actuator test) ............................................................ 91
Fault display ........................................................................................... 93
Fault codes ............................................................................................ 93
Maintenance .......................................................................................... 100
Putting the control unit into the service position ................................. 100
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Draining the boiler on the heating water side ..................................... 101
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Checking the outside temperature sensor .......................................... 101
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Checking the boiler temperature sensor, cylinder temperature sen-
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sor or flow temperature sensor for low loss header ............................103
Checking the collector temperature sensor or cylinder temperature
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sensor on the solar control module .................................................... 104
Checking the outlet temperature sensor .............................................105
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Checking the plate heat exchanger .................................................... 105
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Checking the flue gas temperature sensor ......................................... 106
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Checking the temperature limiter ........................................................107
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Checking the fuse/MCB ...................................................................... 109
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Checking the solar control module fuse ............................................. 109
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Mixer extension kit .............................................................................. 109
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Checking the Vitotronic 200-H (accessories) ...................................... 111
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Control unit ............................................................................................ 112
Heating mode ..................................................................................... 112
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Heating the DHW loading cylinder from cold ...................................... 112
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Reheating when DHW is drawn off ..................................................... 112
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DHW heating via solar collectors ........................................................ 113
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Boosting DHW heating ....................................................................... 113
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Internal extensions (accessories) .......................................................... 113
Internal extension H1 .......................................................................... 113
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Internal extension H2 .......................................................................... 114
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External extensions (accessories) ......................................................... 115
AM1 extension .................................................................................... 115
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EA1 extension .................................................................................... 116
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Control functions .................................................................................... 118
External operating program changeover ............................................ 118
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External blocking ................................................................................ 118
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External demand ................................................................................ 119
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Venting program ................................................................................. 119
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Fill program ......................................................................................... 119
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Screed drying ..................................................................................... 119
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Raising the reduced room temperature .............................................. 121
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Reducing the heat-up time ................................................................. 122
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Allocating heating circuits to the remote control .................................... 123
Electronic combustion control unit ......................................................... 124
Internal connection diagram .................................................................. 125
External connection diagram ................................................................. 126
Connection diagram, solar control module ............................................ 127
Ordering parts ........................................................................................128
Overview of assemblies .........................................................................129
Casing assembly ................................................................................... 130
Hydraulic assembly ................................................................................132
Cylinder module assembly .....................................................................136
Index
5