Bedienungsanleitung Bosch Condens GC7000WP (Seite 43 von 52) (Englisch)

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Troubleshooting

Condens 7000 WP – 6721841195 (2022/01)

2946 V Incorrect code plug detected Replace boiler identification module/coding plug (Bosch contact customer service).

2948 B No flame signal with low output Burner starts automatically after purging.

If this fault occurs frequently, check CO2 setting.

2949 B No flame signal with high output The burner is automatically restarted following purging.

1. Check burner gaskets, replace if required.

2. Reduce output.

2950 B No flame signal following starting procedure Burner starts automatically after purging.

Set gas/air ratio correctly.

2951 V Loss of flame too many times 1. Open the main shut-off valve.

2. Open the device shut-off valve.

3. Interrupt the power supply of the appliance and check the gas line.

4. Carry out function check for ionisation.

5. Connect the plug for the ionisation and ignition sections correctly.

6. Establish protective conductor connection (PE) in the control device.

7. Check flame sense electrode, replace if necessary.

8. Check ignition electrode, replace if necessary.

9. Check ignition electrode connecting lead, replace if necessary.

10.Check flame sense electrode connecting lead, replace if necessary.

11.Set the burner correctly/replace the burner nozzles.

12.Set the burner at minimum rated load.

13.Check air/gas ratio control valve, replace if necessary.

14.Check the flue system and repair if necessary.

15.The interconnected room air supply is too small or the size of the ventilation opening

is too small.

16.Clean the heating block on the flue gas side.

17.Check control device/burner control unit, replace if necessary.

2952 V Internal fault when testing the ionisation

signal

1. Perform reset.

2. Replace control device/burner control unit.

2955 B Boiler does not support the parameters set

for the hydraulic configuration

Check hydraulic settings, change if necessary.

• Low-loss header

• Internal DHW circuit (cylinder charging circuit)

•Heating circuit 1

• Heating pump in appliance

2956 O Hydraulic configuration at the boiler

activated

–

2957 V Boiler electr. system fault 1. Reset control device / burner control unit.

2. Reconnect electrical connections at control device / burner control unit correctly.

3. Replace the control device/burner control unit.

2961

2962

VNo fan signal available 1. Check fan and connecting lead.

2. Check mains voltage.

2963 B The heat exchanger sensor or both supply

and heat exchanger sensors are defect

1. Connect the plug to the temperature sensor correctly.

2. Connect the plug to the control device correctly.

3. Attach the temperature sensor correctly.

4. Check the temperature sensor, replace if necessary.

5. Check temperature sensor connecting lead, replace if necessary.

2964 Flow rate in heat exchanger too low –

2965 B Flow temperature too high 1. Ensure that the heating circulation is working correctly.

2. Check pump setting, adjust to match heating system if necessary.

3. Connect the plug to the temperature sensor correctly.

4. Connect the plug to the control device correctly.

5. Attach the temperature sensor correctly.

6. Check the temperature sensor, replace if necessary.

7. Check temperature sensor connecting lead, replace if necessary.

Fault

code

Fault

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