Buffalo GF539 Manuel D'instructions page 14

UK
Cleaning and de-scaling the Boiler Tank
Warning: The boiler tank needs to be de-scaled on a regular basis

Follow the steps for draining out the boiler tank

Insert and secure the boiler tank bleeder cap

Fill the boiler tank with a solution of scale remover (suitable for use in coffee machines) and
water (following instructions supplied with the scale remover)

Leave the solution in the tank for the time indicated in the scale remover instructions

Empty out the solution from inside the boiler tank

Rinse out the tank as per scale remover instructions
Thermal Protector Switch
If the Boiler tank boils dry the units thermal protector switch will activate to protect the heating
element. Allow to cool then reset as follows

Use a suitable tool to loosen and
remove the protective screw (A)

Use a suitable tool to press the button
inside to restore normal machine
operation.