Bedienungsanleitung Bosch Condens GC7000WP (Seite 39 von 52) (Englisch)

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Troubleshooting

Condens 7000 WP – 6721841195 (2022/01)

11 Troubleshooting

11.1 Operating and fault displays

11.1.1 General information

•Fault code: indicates which fault is present.

•Fault category: indicates what kind of fault is present and its effects.

Fault category O (operating code)

Operating codes indicate the operating conditions in normal operation.

Fault category B (blocking faults)

Blocking faults result in the heating system being shut down temporarily.

The heating system restarts automatically as soon as the blocking fault is

removed.

Fault category V (locking faults)

Locking faults result in the heating system being shut down, and the

system can only be restarted after a reset.

▶ Press the and keys, until Reset is displayed.

The appliance resumes operation.

If a fault persists:

▶ Rectify the fault according to 10.1.2 Fault code table

Fault category W (service displays)

Service displays indicate that a maintenance or repair has to be carried

out. The device is still in operation. If the service display has been caused

by a defect, under certain circumstances, it may continue running with

restricted functions.

11.1.2 Fault code table

Fault

code

Fault

category

Fault text on the display, description Remedy

200 O Boiler in heating mode –

201 OBoiler in hot water mode –

202 O Boiler in anti-cycle mode –

203 OBoiler in standby, no heat energy demand –

204 O Current prim. water temp. higher than set

val.

–

208 OChimney sweep demand –

214 V Fan shut down during safety time 1. Check the plug on the fan.

2. Check the connecting lead to the fan.

224 VMaximal flue gas thermostat or heat

exchanger maximal thermostat has

activated

Heating circuit:

1. Check that the heating water is circulating correctly.

2. Open the closed valve in the heating circuit.

3. Top up water until the preset pressure is reached.

4. Connect the plug to the heating block temperature limiter correctly.

5. Check heating block temperature limiter, replace if required.

Potable water circuit:

Check that the potable water in the cylinder circuit is circulating correctly.

227 V No flame signal after ignition 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. Check the supply pressure of the gas line.

5. Check that the burner is working correctly, adjust burner if necessary.

6. Check CO2 content of combustion air, adjust if necessary.

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

8. Carry out function check for ignition.

9. Carry out function check for ionisation.

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

11.Connect the plug for the air/gas ratio control valve correctly.

12.Check condensate pipes.

13. Check flue gas side of heat exchanger for pollution.

14.Check flame sense electrode, replace if necessary.

15.Check ignition electrode, replace if necessary.

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

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

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

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

228 VFlame signal without flame present 1. Check ionisation cable, replace if necessary.

2. Check electrode set, replace if necessary.

3. Replace the control device.

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