Service23SERVICEIn the «What to do, if ...» section a number of malfunctions are listed thatyou can rectify yourself. In the event of a malfunction, look there first.Is it a technical malfunction?Then please contact your customer service centre. (You will find addressesand telephone numbers in the «Customer Service Centres» list.)Always take the time to prepare yourself for the call. By this means you willmake diagnosis of the problem easier and also make it easier to decide if acustomer service visit is necessary:Please determine as accurately as possible:• How is the malfunction noticeable?• Under what circumstances does the malfunction occur?Prior to the telephone call it is imperative that you make a note of the following appliance code numbers that are given on the rating plate:• PNC Code (9 digits),• S-No Code (9 digits).We recommend you to record the code numbers here so that you alwayshave them at hand:PNC . . . . . . . . .S-No . . . . . . . . .When will you be charged, also during the warranty period?• when you could have rectified the malfunction with aid of the Table ofMalfunctions (see «What to do, if ...» section),• if the customer service engineer has to make several calls because he wasnot given important information prior to his visit, and therefore, e. g., hadto fetch replacement parts. You can avoid multiple calls if you prepareyourself well for the telephone call, as described above.