HP 30 HP30 - Manual (Page 192)

Chapter 7 - Options
7-30
5) LED Indicator lamp description
DBU has three LED indicator lamps.
Display Description
POWER Power LED turns Red when input power is applied to DBU.
RUN RUN LED is blinking while the DBU is activated by motor regenerating energy.
OHT
The unit shuts down the output and turns OHT LED ON when the heatsink is overheated
in operation by its protection function.
OHT POWER RUN
▶ POWER LED (Red) : indicates input power is applied.
▶ RUN LED (Green) : indicates Dynamic braking is active.
▶ OHT LED (Green) : indicates Over Heat Trip occurs