Observation:

When the boiler is operating in the SARA range, the green LED flashes rapidly (8 times per second) to signify the SARA function is active. The LED will only flash briefly when the dial is moved in to the sara sector, it does NOT flash continuously.
Note:
This is NOT a fault with the boiler and is normal operation.
When the temperature selector is set within the SARA range the boiler will automatically raise the heating flow outlet temperature by 5°C every 20 minutes that the room thermostat contacts remain in the closed position or until the boiler reaches the maximum operating temperature.
HEATING PARAMETERS
If a FAULT CODE appears then click HERE