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Troubleshooting
Condens 7000 WP – 6721841195 (2022/01)
44
Table 20 Indicators and fault displays
11.1.3 Faults that are not displayed
Table 21 Faults that are not shown on the display
Fault display: System pressure too low
If the system pressure in the heating system falls below the minimum
pressure that has been set, the display shows the message LoPr => L0.X
bar. The system pressure is too low.
Fill the heating system.
2966 B Flow temperature rise in heat exchanger too
rapid
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.
2967 The temperature difference between supply
temperature sensor and temperature
sensor at heat exchanger is too large
2968 Refilling system pressure
2970 Pressure drop in heating system too rapid
2971 B System pressure too low 1. Vent the heating system.
2. Check the heating system for tightness.
3. Top up water until the target pressure is reached.
4. Check the pressure sensor, replace if necessary.
5. Check the pressure sensor cable, replace if necessary.
2972 Mains voltage too low 1. Establish supply voltage of at least 196 VAC.
2. Replace burner control unit.
3071 No communication with remote control 1. Check configuration.
2. Check cabling.
Device faults Remedy
Combustion noises too loud, rumbling noises Check the gas type.
Check the gas supply pressure.
Check the flue system, clean or repair as necessary.
Check the gas/air ratio.
Check the air/gas ratio control valve, replace if required.
Flow noises Set the pump rate or pump characteristic map correctly and match to the maximum
output.
Heat-up takes too long. Set the pump rate or pump characteristic map correctly and match to the maximum
output.
Flue gas values incorrect, CO content too high. Check the gas type.
Check the gas supply pressure.
Check the flue system, clean or repair as necessary.
Check the gas/air ratio.
Check the air/gas ratio control valve, replace if required.
Violent ignition, poor ignition. Check the ignition transformer with service function t01 for misfiring, replace if
required.
Check the gas type.
Check the gas supply pressure.
Check the power supply.
Check the electrodes with cable, replace if required.
Check the flue system, clean or repair as necessary.
Check the gas/air ratio.
For natural gas: check the external gas flow monitor, replace if required.
Check the burner, replace if required.
Check the air/gas ratio control valve, replace if required.
No function, the display remains dark. Check the electrical wiring for damage.
Replace defective cables.
Check the fuse, replace if required.
Fault
code
Fault
category
Fault text on the display, description Remedy
44


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