Viessmann VITODENS 200-W Service Instructions Manual page 5

Vitodens 200-W B2HA 112, 150 Service
Coding 1
Coding 2
Diagnosis and Service Scans
Troubleshooting
Function Description
Additional Information
General...................................................................40
Boiler......................................................................42
DHW.......................................................................42
Solar.......................................................................43
Heating Circuit 1, 2 and 3..........................................44
General...................................................................48
Boiler......................................................................55
DHW.......................................................................56
Solar.......................................................................58
Heating Circuit 1, 2 and 3..........................................62
Calling up the Service Level........................................68
Diagnosis.................................................................69
Checking Outputs (Relay Test)...................................71
Fault Display............................................................72
Fault Codes..............................................................72
Corrective Action......................................................80
Checking the outside temperature sensor..................80
Check fuse...........................................................80
Check fuses in the external accessories
connection box......................................................80
Checking the boiler temperature sensor and
fixed high limit, DHW tank temperature sensor or
flow temperature sensor for the low loss header........81
Check the flue gas temperature sensor.....................82
Extension kit for heating circuit with mixing valve......83
Checking the rotational direction of the
mixing valve motor.................................................83
Check the Vitotronic 200-H (accessories)..................83
External Extensions AM1 (accessory)..........................84
Internal Extensions EA1.............................................85
Control Functions......................................................87
Wiring Diagram.........................................................90
Burner Program Sequence of Operation........................92
Parts List.................................................................93
Technical Data.........................................................98
Maintenance Record................................................100
Lighting and Operating Instructions............................101
Table of Contents
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