Technical data

7 181 465 346 GB (03.02)
2
Table of contents
Table of contents
Warnings 3
Symbols 3
1 Layout of Appliance 4
1.1 combi 4
1.2 system 5
2 Bosch Heatronic board functions 6
2.1 Initialisation 6
2.2 Temperature display 6
2.3 Indication of faults 6
2.4 Special programme visualisation 6
2.5 Boiler service functions 8
2.5.1 First Service Level 8
2.5.2 Secondary Service Level 11
3 Failure identification procedure 13
3.1 Notes on using the fault code tables 13
3.2 Summary 14
3.2.1 Appliance faults 14
3.2.2 Faults that are not displayed 14
3.3 Error codes on the display 15
3.4 Faults that are not displayed 42
3.4.1 Appliance faults 42
3.4.2 Programmer faults 48
4 Appendix 52
4.1 NTC values 52
4.1.1 Outside temperature sensor 52
4.1.2 CH flow NTC sensor, heat store
NTC sensor, constant hot water
NTC sensor and hot water NTC sensor 52
4.2 Electronic schemes 53
4.3 List of most important replacement parts 54
4.4 Approved corrosion inhibitors and
anti-freeze fluids for central
heating water 55
4.4.1 Frost protection 55
4.4.2 Sealing agents 55
4.5 Summary of BDH Information Sheet
on Identifying Corrosion by CFCs 55