Table of Contents
Advertisement
4 Operation
4.5 Status displays (for maintenance and servicing
work carried out by a qualified service engineer)
• The status displays are activated by pressing the "i" (1)
button.
2
Fig. B.10 Status displays
The display (2) now shows the corresponding status code,
e.g. "S.4" for burner operation. Please refer to table B.1
(below) for details of the most important status codes.
• Press the "i" button again to return to normal mode.
During changeover phases, such as when the system
restarts after the flame has been extinguished, the "S"
status message is displayed briefly.
Display
Meaning
S. 0*
No heat requirement
S. 1*
Pump running
S. 3*
Heating system ignition
S. 4*
Burner ignited
S. 5*
Fan and pump overrun
S. 6*
Heating fan run-out
S. 7*
Pump over run
S. 8*
Anti cycling mode (after heating operation)
S. 14**
Burner ignited
S. 20** Hot water cycle mode
S. 31*
Summer mode
S. 34*
Frost protection mode
Table B.1: Status displays (a complete list of status codes can be
found in the installation and maintenance instructions)
* Heating mode
** Hot-water mode
4.6 Resetting the appliance
When a hot water tap or the central heating system
requires heat, the boiler automatically ignites and starts
to operate. If the automatic ignition is not successful
8
within 5 attempts, then the boiler does not go into ope-
ration and switches to "Lock out".
This is indicated by a fault code "F.28" or "F.29" on the
display.
A new attempt to ignite the flame can then only be per-
formed after pressing the "Reset" button.
• Press the "Reset" button (1) and hold for approx. 1 second.
1
Fig. B.11 Resetting the appliance
Attention!
If the boiler still shuts off after a third attempt,
then please consult your installer or Vaillant
Service Solutions.
The boiler also switches to "Fault" when there is not
enough water in the system. This fault is indicated by
fault code "F.22" "F.23" or "F.24".
The boiler can only be placed back in operation after the
heating system has been properly refilled with water.
In the unlikely event of any other fault developing, which
prevents the boiler from operating, the display will also
show other fault codes. If a fault code is displayed please
contact your installer or Vaillant Service Solutions.
Note!
If contacting Vaillant Service Solutions please
remember to quote the fault code, as this will
help to pinpoint the fault.
4.7 Turning the boiler OFF
4.7.1 To turn OFF the central heating only
(Summer mode)
• Turn the maximum radiator temperature control knob
used to control the heating supply temperature (1) all
the way to the left.
Note!
You can switch off the heating operation in sum-
mer, for example, but the boiler will continue to
provide domestic hot water whenever a hot
water tap is opened.
1
max. 3 x !
STOP
Instructions for use ecoMAX
Hide quick links:
Advertisement
Table of Contents
