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6720813171 (2016/05) 55
e
[0/c/\|
e
[2/8/3|
2)
Pre-operative phase:
The boiler prepares for a burner start-up whenever a heat
demand or a DHW request arises.
Off
e
[0/e/\|
e
[2/6/5|
2)
Readiness for operation:
The boiler is in standby mode. There is a current heat
demand, but too much energy has been supplied.
Off
e
[0/h/\|
e
[2/0/3|
2)
Readiness for operation:
The boiler is in standby mode. There is no current heat
demand.
Off
e
[0/l/\|
e
[2/8/4|
2)
Ignition phase:
The gas valve is activated.
Off
e
[0/u/\|
e
[2/7/0|
2)
Start-up phase:
The boiler starts up after activation of the mains power
supply or completion of a system reset. This code is
displayed for a maximum of 4 minutes.
Off
e
[0/y/\|
e
[2/0/4|
2)
Operating phase:
The flow temperature sensor has detected that the
current flow temperature is higher than the flow
temperature setting on the BC10, or that it is higher than
the flow temperature. Calculated according to heating
requirements, or that it is higher than the flow
temperature calculated for the DHW mode.
Off The room temperature is not
possibly reached.
e
[0/y/\|
e
[2/7/6|
e
Fault:
The flow temperature sensor has measured a current flow
temperature higher than 95 °C.
No
4)
5)
Off The room temperature is not
possibly reached.
e
[0/y/\|
e
[2/7/7|
e
Fault:
The safety temperature sensor has measured a current
safety temperature higher than 95 °C.
No
4)
5)
Off The room temperature is not
possibly reached.
e
[0/y/\|
e
[2/8/5|
e
Fault:
The return temperature sensor has measured a current
return temperature higher than 95 °C.
No
4)
5)
Off The room temperature is not
possibly reached.
e
[1/l/\|
e
[2/1/1|
e
Fault:
There is no connection between contacts 78 and 50 of
the UBA 3 installation base.
No Off No heating operation and no
DHW.
e
[2/e/\|
e
[2/0/7|
e
Fault:
The system pressure is too low (less than 0.2 bar).
No Off No heating operation and no
DHW.
e
[2/f/\|
e
[2/6/0|
e
Fault:
The flow temperature sensor has not, after burner start-
up, detected any temperature increase in the heating
system water.
No Off
e
[2/f/\|
e
[2/7/1|
e
Fault:
The heating water temperature difference, measured
between the flow temperature sensor and the safety
temperature sensor, is too high.
e
[2/p/\|
e
[2/1/2|
e
Fault:
The flow temperature sensor has measured a heating
water temperature increase of over 5 °C/s.
No
4)
5)
Off
e
[2/u/\|
e
[2/1/3|
e
Fault:
The temperature difference measured between the flow
temperature sensor and the return temperature sensor, is
more than 50 °C.
No
4)
5)
Off
e
[2/y/\|
e
[2/8/1|
e
Fault:
The pump has stopped or is running without water.
No Off
Display codes
Display code
LED on
UBA 3 Other effectsz
Main
display
code
z
Sub
display
code
z Key to display code
Reset
requi-
red?
Table 24 Display codes
55


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