working hours incurred on site. If devices are sent to us free of charge for warranty repair, we
will also assume the labor costs for any warranty repairs.
1.3 Device identification
The year of manufacture of the Kröber O2 can be derived from the serial number. The silver
type plate is located on the rear side above the coarse dust filter and has the following format
Here YYMM is the coding for year and month, e.g. 1912 in 1019126749 means December
2019.
Note that the prefix CC can be two to four digits, e.g. 16T20021234 and S4OX20017253.
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