Only a qualified professional is authorized to intervene on your appliance safely.
Limit your intervention on the appliance to switching it on/off, cutting off power, or simple adjustments that you are familiar with.
If it is a breakdown with an error message on the product's screen, use this code and the table of fault codes (available in the manual of your appliance or in the technical support section by product on the website below) to inform your installer about the nature of the problem.
You can also use this table of fault codes to determine whether this error causes a shutdown of the operation.