Instructions for use ecoTEC plus / 0020020829_038
h
Note!
Vaillant offer room thermostat/time control
accessories which give accurate and economic
room temperature control as well as improved
comfort.
The boiler will now operate automatically to provide
central heating for the conditions selected on the
external controls.
After the boiler stops operating the pump will continue
to operate for a short period to fully disperse the heat
from the boiler.
After a power cut or every 23 hour in frost setting /
summer mode the pump will run for one minute to pre-
vent it from sticking. This will also occur during normal
operating if there is no demand for more than 24 hours.
4.6 Pump exercise
h
Note!
The boiler incorporates an anti-cycling econo-
miser control to prevent energy wasteful on
and off operation of the boiler for short periods
when in the central heating mode. When turning
the room thermostat to a higher setting there
may be a short delay before the boiler operates.
4.7 Status displays
1
2
Fig. 4.8 Status displays
The status displays provide information on the opera-
ting status of the appliance.
• Press the “i” button (1) to activate the status displays.
The display (2) then shows the current status code,
for example “S. 4” for burner operation. The table
below explains the most important status codes.
In switching phases, for example on starting up again
after the flame was extinguished, the status message
“S.” briefly appears.
• Press the “i” button (1) again to switch the display
back to normal mode.
Display Meaning
Displays during heating operation
S. 0 No heat required
S. 1 Pump running
S. 3 Ignition sequence (heating operation)
S. 4 Burner ignited
S.6 Fan and pump overrun
S.7 Pump overrun
S. 8 Anti cycling mode (after heating operation)
S. 30 Room thermostat no heating demand
S. 31 Summer mode active
S. 34 Frost protection mode
Displays in cylinder charging mode
(with optional accessories fitted)
S. 20 Cylinder charging request
S. 24 Cylinder charging burner on
Table 4.1 Status codes (selection, a complete set of status codes
can be found in the installation and servicing manual)
4.8 Troubleshooting
In the unlikely event that a problem occurs with the
operation of the ecoTEC boiler, the following points
should be checked:
Boiler fails to operate:
– Is the gas supply turned on?
– Is there enough water in the heating system?
– Is the electrical supply switched on?
– Is there an ignition problem?
a
Caution!
Inappropriate modifications can cause damage.
If your boiler still does not operate then please
consult your installer or Vaillant Service
Solutions (0870 6060 777).
4.8.1 Ignition problems
2
1
Fig. 4.9 Troubleshooting
4 Operation
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