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Fault display
Faults are signalled on the display by means of a
"Fault" message and by an illuminated red fault indi-
cator.
Checking and acknowledging faults
Note
If an acknowledged fault is not remedied, the fault
message is re-displayed the following day:
Press the following keys:
1.
for troubleshooting.
d
Calling up acknowledged fault messages
Press the following keys:
1.
+
simultaneously for approx. 4 s.
d
å
The "Service" menu appears.
2.
/
for "Fault history".
|
~
Plain text fault display
The following faults are displayed as plain text. The
fault codes and their meanings are listed in the table
on page 62.
■
"Excess temperature"
"Repeat heat-up"
■
"Fault, O2 probe"
■
"Boiler flow"
■
■
"Boiler return"
■
"Flue gas sensor"
Calling up fault codes from the fault memory (fault history)
The 10 most recent faults are saved and can be called
up.
Faults are sorted by date. The most recent fault is at
the top.
Fault
Outside temp sensor
Fault O2 probe
Acknowledge with
Fig. 35
34
91
OK
2.
/
to select the fault message to be acknowl-
|
~
edged, if several faults are present.
3.
for "Acknowledge".
d
4.
/
for "Yes" or "No".
|
~
5.
to confirm.
d
3.
to confirm.
d
4.
/
for "Display".
|
~
5.
to confirm.
d
6.
/
for the list of current faults.
|
~
■
"Outside t sensor"
■
"Buffer sensor top"
■
"Buffer sensor centre"
■
"Buffer sensor bottom"
"Flow sensor"
■
"DHW sensor"
■
"Return sensor"
■
■
"KM-BUS"
Press the following keys:
1.
+
simultaneously for approx. 4 s.
d
å
The "Service" menu appears.
2.
/
for "Fault history".
|
~
3.
to confirm.
d
4.
/
for "Display".
|
~
5.
until the default display is shown.
ä
Troubleshooting
61
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