FREE BOILER MANUALS
NO REGISTRATION, just download...
Buderus
Fault Codes
Listed below are the common Buderus fault codes as described by the boiler manufacturer along with a possible cause.
Buderus Fault Codes
|
Display code |
Fault |
Action |
||||||
|
– |
No communication between UBA 3 and BC10. | Press the “Reset” button, if fault persist contact your installer | ||||||
|
|
Open the servicing cocks. Fill and bleed the heating system. Open a thermostatic valve. Replace the supply, safety and/or return sensors. Replace the primary circulation pump | ||||||
|
1 L 211 |
The UBA 3 does not register any connections to the unused contacts 78 and 50. |
Restore the contact between the UBA 3 and the UBA 3 mounting base |
||||||
|
2 E 207 |
The system pressure is too low. | Fill and bleed the heating system | ||||||
|
|
Open the servicing cocks. Fill and bleed the heating system. Open a thermostatic valve. Replace the supply and/or safety sensors. Replace the primary circulation pump |
||||||
|
2 L 266 |
The primary circulation pump does not generate a pressure difference | Try to undo the jam or replace the primary circulation pump. Replace the primary circulation pump. Replace the supply cord. Clean the circulation pump (inside). Connect the expansion tank to the return conduit. Clean the pressure sensor. | ||||||
|
2 P 212 |
Temperature increase of supply sensor or safety sensor is more than 7.5 °F/sec (5 K/sec) | Open the servicing cocks. Fill and bleed the heating system. Open a thermostatic valve. Replace the supply and/or safety sensors. Replace the primary circulation pump | ||||||
|
2 U 213 |
The temperature difference between the supply and return sensors is more than 90 °F (50 K) | Open the servicing cocks. Open a thermostatic valve. Replace the supply and/or safety sensors. Replace the primary circulation pump | ||||||
|
3 A 264 |
The air fan has failed during the operating phase. | Reconnect the plug-and-socket connection of the blower. Replace the tacho wire. Have the electrical system tested. Replace the supply cord. | ||||||
|
3 F 273 |
The blower is switched off during the safety test | Fully switch off the heat request and check that the blower is still operational after 1 minute. Replace if necessary | ||||||
|
3 L 214 |
The blower is switched off during the safety test | Reconnect the plug-and-socket connection of the blower. Replace the tacho wire. Have the electrical system tested. Replace the supply cord. | ||||||
|
3 P 216 |
The blower is running too slowly | Clean or replace the blower. Have the electrical system tested. | ||||||
|
3 Y 215 |
The blower is running too fast | Restore the plug-and-socket connection. Replace the tacho wire. Have the electrical system tested. Deal with blockage. Take the second blower out of service. Replace the blower | ||||||
|
|
Open the servicing cocks. Fill and bleed the heating system. Open a thermostatic valve. Replace the primary circulation pump. Replace the supply and return sensor | ||||||
|
4C 224 |
The UBA 3 does not register the short cut between the unused contacts 22 and 24 | Restore the contact between the UBA 3 and the UBA 3 mounting base. | ||||||
|
4E 278 |
The sensor test has failed | Replace the cable loom or the affected part thereof | ||||||
|
4L 220 |
The safety sensor is shorted or measures temperatures higher than 266 °F (130 °C) | Open the servicing cocks. Fill and bleed the heating system. Open a thermostatic valve. Replace the primary circulation pump. Replace the cable loom or the affected part thereof. Replace the safety sensor | ||||||
|
4P 227 |
The safety sensor contact is interrupted | Replace the cable loom or the affected part thereof. Replace the safety sensor | ||||||
|
|
Replace the cable loom or the affected part thereof. Replace the supply and return sensor | ||||||
|
|
Replace the cable loom or the affected part thereof. Replace the supply and return sensor | ||||||
|
6 A 227 |
No ionization after four startup attempts | Contact the gas utility company to ensure that no nitrogen remains in the gas tank or gas supply pipes. Bleed the gas supply pipe. Replace the hot surface ignitor. Adjust the gas/air ratio. Fit the correct gas orifice. Clean and/or replace the corresponding components. Deal with blockage. | ||||||
|
6 C 228 |
An ionization current was measured before the burner start. | Replace the ionization electrode | ||||||
|
6 C 306 |
An ionization current was measured after the burner switch-off | Replace the gas valve | ||||||
|
6 L 229 |
Ionization fails during the operating phase | Ensure that no nitrogen remains in the gas tank or gas supply pipes, in close consultation with the gas utility company. Bleed the gas supply pipe. Adjust the gas/air ratio. Clean and/or replace the corresponding components |
|
6 P 269 |
The hot surface ignitor activates too long | KIM defective, contact the Buderus customer service | ||||||||||||
|
7 C 231 |
The power supply was interrupted after a fault message | Press the “Reset” button, if fault persist contact your installer | ||||||||||||
|
|
Contact the Buderus customer service or your installer | ||||||||||||
|
8 Y 232 |
The external switch contact is activated | External switch contact has energized. Replace the cable loom or the affected part thereof. Restore the contact. Restore the bridge on the terminal strip again | ||||||||||||
|
|
Contact the Buderus customer service or your installer | ||||||||||||
|
|
Restore the plug-and-socket connection. Replace the cable loom or the affected part thereof. Replace the gas valve | ||||||||||||
|
|
Restore the plug-and-socket connection. Replace the cable loom or the affected part thereof. Replace the UBA 3 |
|
Attention! Buderus boilers require a correct fuel to ensure a proper operation. Especially because the statistics show that Buderus boiler faults occur mostly due to two reasons
Remedying burner faults As mentioned above there are two types of faults burner faults and the control device and heating system faults. Whenever there is a burner fault, the lamp located on the burner will flash. In most cases those faults can be remedied by simply resetting the burner/ resetting the appliance (look below procedure on how to reset the boiler). Heating system faults/errors will be displayed on the display of the control device. Control device and heating system fault finding is included in the section above. To remedy burner faults you should remove the burner hood, if the boiler has an integral burner. Next you should press the burner reset button as shown on the picture below
|
ok
