Jetter AG Service | 9JXM-HMI User Manual 19 / 229 Service9.1 Customer serviceShould you have any questions, suggestions, or problems, please don’t hesitateto contact our service representatives. To contact them, please call our technicalhotline or use the contact form on our homepage:Technical hotline | Jetter - We automate your success.You are also welcome to send an e-mail to our technical hotline:hotline@jetter.dePlease supply the following information when contacting our technical hotline:■ Hardware revision and serial numberFor the hardware revision number, please refer to the nameplate.