Diagnostic LEDs
Front side
Meaning of the LED displays
LED | Color | State and significance |
|---|---|---|
on | ||
Us/K-bus | green | K-bus communication OK |
red | Us present, no K-bus communication | |
off | Us not present, no voltage applied | |
Up | green | Up connected |
off | Up not present, no voltage applied (check the voltage on the KL9309 or the connection of the 20-pin plug) |
Rear side
Meaning of the LED displays
LED | Color | State and significance | |
|---|---|---|---|
on | off | ||
RUN | green | Lit, either weakly or strongly: K-bus communication OK | No K-Bus communication |
ERR | red | No K-Bus communication | No error |