2
02
0-
01
20
Maintenance and Repair
Note
If a button is pressed and held for more than 15 seconds, the associated LED starts to flash
slowly again. The "Power/Error" LED then flashes red at the same time. This fault signal
indicates that a button is stuck. A reset to the factory setting does not occur in this case. As
soon as the button is released, the "Power/Error" LED stops flashing red and lights up green
permanently.