Buderus Logamax GB062-24 KDE H V2, Service Manual

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Content
Logamax Plus GB062 2
Content
1 Safety precautions and symbols . . . . . . . . . . . . . . . 3
1 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . 3
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Before commissioning . . . . . . . . . . . . . . . . . . 4
2.3 Switching the appliance on/off . . . . . . . . . . . . 4
2.4 Setting the maximum flow temperature . . . . . 5
2.5 Setting the DHW temperature . . . . . . . . . . . . 5
2.6 Setting summer mode . . . . . . . . . . . . . . . . . . 5
2.7 Short operating overview . . . . . . . . . . . . . . . . 6
2.8 Product Type Description . . . . . . . . . . . . . . . . 6
3 Service menu settings . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Operating the service menu . . . . . . . . . . . . . . 7
3.2 Service functions overview . . . . . . . . . . . . . . . 8
3.2.1 Menu 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.2 Menu 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.3 Menu 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Explanations of faults table . . . . . . . . . . . . . 15
4.2 Fault group definition . . . . . . . . . . . . . . . . . . 15
4.3 Faults and possible remedy steps . . . . . . . . 17
4.4 Faults that are not shown on the display . . . 40
5 Electrical values, gas conversion and boiler layout
41
5.1 Sensor (NTC) Values . . . . . . . . . . . . . . . . . . 41
5.1.1 Domestic hot water temperature Sensor . . . 41
5.1.2 Central Heating Flow Temperature Sensor,
Storage Tank Temperature Sensor . . . . . . . 41
5.1.3 Outdoor Temperature Sensor (7.747.026.229)
41
5.2 Gas conversion steps . . . . . . . . . . . . . . . . . . 42
5.3 Condens 2500W / CerapurCompact . . . . . . 43
5.3.1 GB062-24K.... . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.2 Electrical values . . . . . . . . . . . . . . . . . . . . . . 44
6 Inspection and maintanance . . . . . . . . . . . . . . . . . 46
6.1 Safety instructions for inspection and
maintenance . . . . . . . . . . . . . . . . . . . . . . . . 46
6.2 Check the heat exchanger . . . . . . . . . . . . . . 47
6.3 Check the electrodes and clean the heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.4 Cleaning condensate trap . . . . . . . . . . . . . . 49
6.5 Check diaphragm (flue gas non-return device) in
the mixer unit . . . . . . . . . . . . . . . . . . . . . . . . 49
6.6 Checking the strainer in the cold water pipe 50
6.7 GB062..K.. (Combi) appliances: Check the plate
heat exchanger . . . . . . . . . . . . . . . . . . . . . . 50
6.8 Checking the expansion vessel . . . . . . . . . 50
6.9 Setting the heating system operating pressure
50
6.10 Removing automatic air vent valve . . . . . . . 51
6.11 Checking the gas valve . . . . . . . . . . . . . . . 51
6.12 Removing the gas valve . . . . . . . . . . . . . . . 51
6.13 Remove the heating pump . . . . . . . . . . . . . 52
6.14 Removing the motor of the 3-way valve . . . 52
6.15 Remove the heat exchanger . . . . . . . . . . . 52
7 Good to know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.1 Integrated Weather Dependet Function (WDC) -
Heat curve . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2 Boiler Frost protection . . . . . . . . . . . . . . . . 53
7.3 Air purging in central heating mode . . . . . . 53
7.4 Air Pressure Switch (APS) . . . . . . . . . . . . . 53
8 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.1 Mixing unit . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.2 Resonator & Burner . . . . . . . . . . . . . . . . . . 54
8.3 Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
8.4 Circulation Pump (ErP pump) . . . . . . . . . . . 56