TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
30-EN
manufacturer settings. Afterwards you will be able to set new preferred settings of
controller operation.
10.15. Controller safeguards
In order to ensure a safe and faultless operation, the controller has been provided
with numerous protections. In the case of an alarm, a sound signal warning is
provided and the display shows a corresponding message. Press MENU to restore the
controller to operation. In the case of the CH Temperature Too High alarm, wait until
the temperature drops below the alarm value.
Thermal protection. The boiler is protected with an additional bimetal sensor
(located at the boiler temperature sensor) that disables the fan when the
temperature exceeds the critical value: 85°C. This is to prevent water from boiling in
the system when the boiler has been overheated or the controller is damaged. When
the protective function is enabled and the temperature drops to a safe value, the
sensor will automatically restart the device and the alarm will be deactivated. If the
sensor is damaged or overheated, the fan is disabled.
Automatic sensor check
In case when the CH temperature sensor is missing or damaged an alarm is activated,
which additional reports the fault on the display e.g.:
The fans are being turned off, whereas CH and WUW pumps are operating
independently from the current temperature, each in accordance with its specific
settings. In case of CH sensor damage, the alarm will remain active until the sensor is
replaced. If the DHW sensor is damaged, the user should press MENU which will turn
off the alarm and the controller will return to one pump operation (house heating).
In order for the boiler to operate in all modes the sensor needs to be replaced.
Temperature protection. After the temperature exceeds 85°C, the alarm is sounded
with the display showing the following message:
The current temperature is read from an electronic sensor and processed by the
thermo controller. When the alarm temperature is exceeded, the fan is shut off and
both pumps begin to run in order to dissipate the hot water troughout the system(s)
in attempt to cool down the water in the boiler.
Anti-boil protection. This protective function is used only in summer mode. For
example, when the water heater setpoint temperature is 55°C and the boiler
