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13
Troubleshooting
Display Meaning
S.62
Gas family check unsuccessful: CO/CO
Check combustion.
S.63
Gas family check unsuccessful: Combustion quality out-
side permissible range (see also F.93).
S.76
System pressure too low; top up water
S.96
Return temperature sensor test running, heating
demands are blocked
S.97
Water pressure sensor test running, heating demands
are blocked
S.98
Flow/return temperature sensor test running, heating
demands are blocked
13.1 Status codes (continuation)
13.2.3 Service messages
If the
"open-end spanner" maintenance symbol appears
on the display, a service message is present. The mainte-
nance symbol appears if you have set a maintenance inter-
val, for example, (¬ section 11.1.6) and it has elapsed. The
boiler is not in fault mode but continues to operate.
To obtain more information about the service message:
> Call up the "Live Monitor" (¬ section 13.2.1).
If status code S.40 is displayed as well as the maintenance
symbol, the boiler is in comfort protection mode. This
means that the boiler continues to operate with restricted
comfort after it has detected a fault (e.g. because of a
severe storm).
> In this case, read out the fault memory in order to deter-
mine whether a boiler component is defective (¬ sec-
tion 13.2.5).
If no fault message is present, the boiler will automatically
switch back to normal operation after a certain time. Com-
fort safety mode may then have been triggered by a severe
storm, for example.
13.2.4 Calling up diagnostics levels
Menu ¬ Installer level ¬ Diagnostics menu
You can use the diagnostics menu to inspect parameters
and modify certain parameters. An overview of the diagnos-
tics codes can be found in ¬ tab. 11.1.
70
13.2.5 Reading off the fault codes
values at limit.
If a fault develops in the boiler, the display shows a fault
2
code F.xx.
A plain text display explains the displayed fault code.
Example F.10: "Flow NTC short circuit".
Fault codes have priority over all other displays. If a fault
occurs, the display no longer shows the current heating
flow temperature of the heating installation.
If multiple faults occur at the same time, the display shows
the corresponding fault codes for two seconds each in
sequence.
> Remedy the fault.
> To restart the boiler, press the fault clearance key
(¬Operating instructions).
> If you are unable to remedy the fault and the fault reoc-
curs despite having carried out several fault clearance
attempts, contact Vaillant Service Solutions (0870 6060
777).
13.2.6 Querying the fault memory
Menu ¬ Installer level ¬ Fault list
The boiler has a fault memory.
You can use this to query the last ten faults that occurred
in chronological order.
The display shows:
– the number of faults that have occurred
– the fault currently selected with fault number F.xx.
– a plain text display explaining the fault
> You can display the last 10 faults that occurred using the
minus button
13.2.7 Resetting the fault memory
You can delete the entire fault list.
> Press the right-hand selection button
("Delete").
> Confirm the deletion of the fault memory by pressing the
right-hand selection button again
Installation and maintenance instructions ecoTEC plus 0020134833_01
or the plus button
("OK").
.
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