DISPLAY INFORMATION
6 720 648 726 (2011/07)
74
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
e [2/y/\| e [2/8/2| e Fault:
No feedback from the pump.
No Off
e [3/a/\| e [2/6/4| e Fault:
The tacho signal from the fan has failed
during the operating phase.
No
4)
5)
Off
e [3/c/\| e [2/1/7| e Fault:
No current of air after a certain time.
Yes
5)
6)
7)
8)
flashing
1 Hz
No heating operation
and no DHW.
e [3/f/\| e [2/7/3| e Operating phase:
The appliance has been switched off for a
couple of seconds, because it had been
running without any interruption for
24 hours. This is a safety check.
No
4)
5)
Off
e [3/l/\| e [2/1/4| e Fault:
The tacho signal from the fan is not present
during the pre-operative or operating phase.
Yes
5)
6)
7)
8)
flashing
1 Hz
No heating operation
and no DHW.
e [3/p/\| e [2/1/6| e Fault:
The fan is running too slowly.
Yes
5)
6)
7)
8)
flashing
1 Hz
No heating operation
and no DHW.
e [3/y/\| e [2/1/5| e Fault:
The fan is running too fast.
Yes
5)
6)
7)
8)
flashing
1 Hz
No heating operation
and no DHW.
e [4/a/\| e [2/1/8| e Fault:
The flow temperature sensor has detected a
flow temperature of over 105 °C.
Yes
5)
6)
7)
8)
flashing
1 Hz
No heating operation
and no DHW.
Display codes
Display code LED on
UBA 3
Other effects
z
Main
display
code
z
Sub
display
code
z
Key to display code
Reset
requi-
red?
Table 24 Display codes
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