Display information 13
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements! 79
[a/0/1| [8/2/8|
Locking fault:
Water pressure sensor generates a fault code.
The digital water pressure sensor is defective.
No heating operation and no DHW.
[a/0/2| [8/1/6|
Locking fault:
No communication with BC10. Contact problem at BC10 or BC10 is
defective.
BC10 settings are no longer taken over
by RCxx devices.
[a/1/2| [8/1/5|
Locking fault:
The contacts to the switch sensor have shorted or are interrupted, the
sensor has been connected incorrectly or is defective.
The water flow to the downstream heat-
ing circuits may be faulty now they can
no longer be provided with the required
heat capacity.
[a/1/2| [8/1/6|
Locking fault:
WM10 not available or no communication. WM10 or bus circuit connect-
ed incorrectly or defective, WM10 is not recognized by the RC-thermo-
stat.
Heating circuit pump 1 is activated con-
tinuously.
[a/1/8| [8/2/5|
Locking fault:
Conflicting addresses. Both RC20 and RC35 are registered as Master.
Both RC35 and RC20 activate heating
circuit 1 and DHW. Depending on the
heating programs set and the required
room temperatures, the heating system
can no longer work correctly.
DHW mode does not work well.
[a/2/1| [8/0/6|
Locking fault:
RC20-HK1 temperature sensor. The integrated temperature sensor of
the remote control (control unit) of heating circuit 1 is defective.
Since there is no actual room tempera-
ture information, room influence and
optimization of the switch times do not
work. The EMS works on the basis of
the values last set on the remote con-
trol.
[a/2/1| [8/1/6|
Locking fault:
RC20-HK1 communication. RC20 addressed incorrectly, wired incorrect-
ly or defective.
Since there is no actual room tempera-
ture information, room influence and
optimization of the switch times do not
work.
[a/3/2| [8/0/7|
Locking fault:
The contacts to the heating circuit flow sensor have shorted or are inter-
rupted, the sensor has been connected incorrectly or is defective.
Heating circuit pump 2 is activated de-
pending on the preset value. The power
to the mixer is switched off and the mix-
er stays in the state it was last put in
(can be adjusted manually).
[a/3/2| [8/1/6|
Locking fault:
MM10 not available or no communication. The heating circuit addresses
on the MM10 and the RC35 do not match up, the MM10 or the bus circuit
is connected incorrectly or is defective, MM10 is not recognized by the
RC35.
Heating circuit 2 cannot be operated
correctly. MM10 and the mixer auto-
matically goes into emergency opera-
tion. Heating circuit pump 2 is activated
continuously. Monitor data in the RC35
is invalid.
[c/a/\| [2/8/6|
Blocking fault:
The return temperature sensor has measured a return temperature high-
er than 221 °F (105 °C)
No heating operation and no DHW.
Display codes
Main
display
code
Sub-
display
code
Key to display code
Other effects
Table 19 BC10 Display codes
1) Only visible on the Service Tool or a specific RC controller.
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