51
Protection against freezing (warning)
Protection against
freezing
Boiler temperature
( °C)
Cause:
Indicator light 2 yellow:
Solution:
Reset:
The boiler temperature is < 7 °C when it is
switched off
Shines
Heat up and let it burn down
Automatically with the next burning down („+“
button), or when the boiler temperature is > 8 °C
Emergency program:
YES, the burning down is possible – do that!
Actions of the regulator:
By the boiler temperature < 7 °C:
The circuit pump is started
If there is a heat in the tank, it is taken out by this
action. If there is no heat in the tank, in the
circulating water is the freezing point decreased.
By the boiler temperature > 8 °C:
The circuit pump is stopped
Incorrectly measured values of the oxygen sensor – the Lambda probe (error)
Error in measuring the
O
2
Boiler temperature
( °C)
Cause:
The indicator light 2
yellow
Unstable heating by sensor, fault in the electrical
circuit or short circuit
Shines
Solution:
Check the sockets and conductors. Dismantle and
clean the oxygen sensor. If it is necessary, replace
it.
Reset:
Emergency program:
Actions of the regulator:
Automatically after the error is removed and the
new scale of the O
2
sensor is set.
YES, the burning down is possible
The regulator works with the amount of the
alternative air V1, V2. The boiler must be stopped
manually and the „–“ button .
Not to shorten the service life of the boiler, it is necessary to remove the
fault immediately! The guarantee could get invalid!
Errors, functions and actions of the regulator – summary
Errors and functions
Actions or operation of the regulator
Power shortage
After the power supply is restored, the operation state is reset as it
was before the power shortage (the boiler is started or stopped
again).
Too high boiler temperature
< 90 °C: the fan is stopped
> 89 °C: the fan is started
Incorrectly measured values of
the boiler temperature
The flue gas fan and the supply pump are stopped. The boiler cannot
be started.
Incorrectly measured values of
flue gas
The boiler can be started. The regulator works with the alternative air
V1 and V2. It is necessary to turn the boiler off manually after
burning down!
Incorrectly measured values of O
2
sensor (Lambda probe)
No line plot is displayed during the heating up.
It is possible to start the boiler, the regulator works with the
alternative air V1 and V2.
Automatic stop function by the
flue gas sensor
If the boiler works for 30 minutes and the flue gas temperature
decreases by 25 % during 15 minutes, the boiler is stopped.
The STB is started
The surplus heat outtake is stopped if the boiler temperature is
< 85 °C. Then, if the boiler temperature increases > 86 °C, the surplus
heat outtake.