Supplied By www.heating spares.co Tel. 0161 620 6677
7 181 465 347 (05.01)
2
Contents
Contents
Safety precautions 3
Symbols 3
1 Layout of Appliance 4
2 Operation 5
2.1 Initialisation 5
2.2 Standard display 5
2.3 Displaying service functions 5
2.4 Setting service functions 6
2.5 Resetting service functions to factory
settings 6
2.5.1 Resetting service functions 0.0 to 4.9 to
their factory settings (Reset 1): 6
2.5.2 Resetting service functions 0.0 to 9.9 to
the factory setting (Reset 2): 6
3 Boiler service functions 7
3.1 Summary 7
3.2 Explanation of service functions 10
4 Rectifying faults 15
4.1 Indication of faults 15
4.1.1 ... on the boiler 15
4.2 Summary 15
4.2.1 Appliance faults 15
4.2.2 Faults that are not displayed 16
4.3 Notes on using the fault code tables 17
4.4 Error codes on the display 18
4.5 Faults that are not displayed 36
4.5.1 Appliance faults 36
4.5.2 Programmer faults 43
5 Replacement of Parts 46
5.1 PCB control board and transformer 46
5.2 Fan Assembly 47
5.3 Primary Heat exchanger/Burner 47
5.4 Pump 48
5.5 Clean condensation trap 48
5.6 Motor of 3-way diverter valve (Fig. 14) 48
5.7 3-way diverter valve 49
5.8 Domestic Hot Water Heat Exchanger 49
5.9 Electrode assembly 49
6 Appendix 50
6.1 NTC values 50
6.1.1 Flue sensor 50
6.1.2 Outside temperature sensor 50
6.1.3 CH flow NTC sensor, DHW cylinder NTC
sensor 1 and hot water NTC sensor 50
6.2 Electrical wiring diagram 51
6.3 Approved corrosion inhibitors and
anti-freeze fluids for central heating water 52
6.4 List of Code plugs used with
this appliance 52
6.5 Summary of BDH Information Sheet on
Identifying Corrosion by CFCs 53
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