Viessmann Vitocrossal 300 Service Manual page 5

Vitocrossal 300 CU3A 26 to 57 Service
Service
(continued)
Coding 1
Coding 2
Diagnosis and Service Scans
Troubleshooting
Function Description
Additional Information
Cleaning and Reconnecting the Condensate Drain System.22
Checking Gaskets and Thermal Insulation Components
on the Boiler.............................................................23
Checking the Diaphragm Expansion Vessel and
System Pressure.......................................................23
Fitting the Burner......................................................24
Clock Natural Gas Meter............................................24
Check CO Setting...................................................25
2
Combustion Management System...............................26
Check Functioning Safety Valves................................26
Check Electrical Connections......................................27
Check the Mixing Valve for Obstructions and Leaks......27
Example Layout 1.....................................................28
Example Layout 2.....................................................32
Example Layout 3.....................................................37
Start-up...................................................................42
Menu......................................................................42
Functional Description...............................................44
Adjusting the Heating Curves.....................................45
General...................................................................50
Boiler......................................................................51
DHW......................................................................52
Solar......................................................................52
Heating Circuit 1, 2 and 3.........................................53
General ..................................................................57
Boiler......................................................................63
DHW......................................................................64
Solar......................................................................66
Heating Circuit 1, 2 and 3.........................................70
Calling up the Service Level.......................................75
Diagnosis................................................................76
Checking Outputs (relay tests)...................................77
Fault Codes..............................................................78
Corrective Action......................................................86
Internal Extensions EA1............................................91
Control Functions.....................................................93
Wiring Diagram.........................................................94
Fitting the Front Panel...............................................96
Burner Program Sequence of Operation.......................97
Parts Lists................................................................98
Installation Fittings.................................................103
Technical Data.......................................................104
Maintenance Record................................................106
Lighting and Operating Instructions...........................107
Table of Contents
Page
5