Problems Due To Low System Water Pressure; Ignition Problems; Flue Problems; Turning Off The Boiler - Vaillant ecoTEC plus 612 Instructions For Use Manual

4.8.1 Problems due to low system water pressure

The device switches to "Fault" if the water pressure in
the heating system is too low. This malfunction is indi-
cated by the fault code "F.22" (dry fire) or "F.23" or
"F.24" (lack of water).
You can only start up the appliance again when the
heating system is sufficiently filled with water.

4.8.2 Ignition problems

plus
1
3
Fig. 4.17 Troubleshooting
If the burner fails to ignite after five attempts, the
device does not start up and switches to "Fault". This is
indicated by the fault code "F.28" or "F.29" in the dis-
play. On ecoTEC plus appliances the display also shows
the flame symbol with a cross through it (1). On ecoTEC
pro appliances, the red LED (2) also lights up.
Automatic ignition can only take place after you manual-
ly reset the fault.
• To reset the fault, press the reset button (3) and hold
it down for one second.
Caution
If the boiler still shuts off after three attempts
of resetting, please consult your installer or
Vaillant Service Solutions.

4.8.3 Flue problems

The appliances are fitted with a fan. If the fan does not
work properly, the appliance will switch itself off.
The display shows the symbols
message "F.32".
Note
If contacting Vaillant Service Solutions please
remember to quote the fault code, as this will
help to pinpoint the fault.
Instructions for use ecoTEC
pro
i F P
bar
and and the fault
4.9

Turning off the boiler

2
Fig. 4.18 Switching off the appliance
• Turn the main ON/OFF control (1) to the „0" position.
Caution
The boiler frost protection and monitoring sys-
tems are only active when the main ON/OFF
control of the appliance is in the "I" position
and it is not disconnected from the main power
supply.
To ensure that these protection devices remain active,
switch your boiler on and off using the external control-
ler.
Note
If the appliance is switched off for a long time
(for example when you are on holiday) you
should also turn off the gas supply, the cold
water service valve and the electrical supply.
Note
Do not turn the ecoTEC system boilers OFF if a
hot water cylinder is also incorporated in the
system unless there is no demand for domestic
hot water.
Operation 4
i F P
bar
1
13