Manual Quick mill QM67 Dual Boiler (page 20 of 24) (English)

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QM67 Dual Boiler Espresso Machine

Owner’s Manual Page 19

Maintenance – Continued

Descaling

• Descaling is the process of running a descaling agent such as citric acid through the

machine to remove the accumulation of mineral deposits.

• If you are using softened water then it should not be necessary to descale the machine.

• Often times descaling can cause more problems than it solves. It can react to the minerals

and foam over ruining electrical components. If the solution is too strong it can cause the

chrome plating inside the group to flake off and get in the coffee or if it’s too weak it can

dislodge minerals and cause a blockage. For liability reasons we strongly discourage

descaling and will not provide any instructions on the process.

PID Controller

• The PID controller does not require any maintenance, but if the buttons have not been

used in a long time then the contacts inside the controller can become oxidized and the

buttons may no longer work.

• To resolve this issue with the machine turned off, rapidly and repeatedly press the up and

down arrows over and over again. Do this for up to a minute and it should help clean off

the contacts and the buttons should start working again.

Cleaning The Stainless Steel

• Specialty stainless steel cleaners can be used, but glass cleaner works well also. If there

are dried up water stains then they can be cleaned with white vinegar.

• After cleaning the machine using a dry lint free cloth to buff the machine will provide a

nice mirror finish to the stainless steel.

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Quick mill QM67 Dual Boiler Manual

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