Buderus Logamax plus Installation Instructions Manual page 78

13 Display information
Main Sub-
display display
code code
Start-up phase:
[8/8/8|
The boiler starts up after activation of the mains power supply or comple-
tion of a system reset. This code is displayed for a maximum of
4 minutes.
Blocking fault:
[9/a/\| [2/3/5|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/h/\| [2/3/7|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/h/\| [2/6/7|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/h/\| [2/7/2|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/l/\| [2/3/4|
The contacts for the gas valve have been broken.
Blocking fault:
[9/l/\| [2/3/8|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/p/\| [2/3/9|
The UBA 3 or the KIM is defective.
Blocking fault:
[9/u/\| [2/3/3|
The UBA 3 or the KIM is defective.
Locking fault:
[a/0/1| [8/0/0|
The contacts to the outdoor-temperature sensor have shorted or are
interrupted, the sensor has been connected incorrectly or is defective.
Locking fault:
[a/0/1| [8/0/8|
The contacts to the DHW temperature sensor have shorted or are inter-
rupted, the sensor has been connected incorrectly or is defective.
Locking fault:
[a/0/1| [8/0/9|
The contacts to DHW temperature sensor 2 have shorted or are inter-
rupted, the sensor has been connected incorrectly or is defective.
[a/0/1| [8/1/0|
Locking fault:
The boiler water does not warm up. Sensor lead broken or shorted, sen-
sor connected incorrectly or defective, filling pump connected incorrectly
or defective, permanent tapping or leak.
Locking fault:
[a/0/1| [8/1/1|
Thermal disinfection has failed. Outlet flow during disinfection period too
high, sensor lead broken or shorted, sensor connected incorrectly or
defective, filling pump defective.
Locking fault:
[a/0/1| [8/1/6|
No connection to EMS. EMS bus system is overloaded, UBA 3/MC10 is
defective.
Table 19 BC10 Display codes
1) Only visible on the Service Tool or a specific RC controller.
78 Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
Display codes
Key to display code
Other effects
No heating operation and no DHW.
No heating operation and no DHW.
No heating operation and no DHW.
No heating operation and no DHW.
No heating operation and no DHW.
No heating operation and no DHW.
No heating operation and no DHW.
Minimum outdoor temperature is as-
sumed.
No DHW is heated any more.
No DHW is heated any more.
No DHW available, but there is heating
operation. The DHW priority is can-
celled when the fault message appears.
Switch the boiler off and on to reset the
boiler.
Thermal disinfection was interrupted.
The boiler no longer receives a heat de-
mand. The heating system does not
heat any longer.