On your device there is usually a sticker next to the nameplate with a 2D bar code and the serial number (7-digit alphanumeric, i.e. numbers and capital letters).
The serial number on the sticker shown here is only an example!
Suitable products
Greenhouse DD
DIAMANT IV DS 10 DT
DIAMANT IV DS 10 DT
Greenhouse SD
DIAMANT IV DS 10 ET
DIAMANT IV DS 10 ET
Greenhouse SD
DIAMANT II DS 10 ET
DIAMANT II DS 10 ET