Legrand CSU Series 32 kHz - Manual (Page 9)

Lights do not turn on, even with motion in the room, and…
... the red LED does not flash (does not sense motion):
—Make sure the circuit breaker has been turned back on.
—Check the sensitivity setting and increase as needed.
—Check that 24VDC is at the sensor red wire.
• If 24VDC is present—possible sensor problem (Call Tech Support).
• If 24VDC is not present at the sensor:
a) Make sure that the power pack has the correct voltage rating for your
voltage (120 or 277VAC). Replace with correctly rated power pack.
b) If the power pack is correct—check the high-voltage going into the power pack—
use proper safety precautions.
– If 120 or 277VAC is present—possible power pack problem (Call Tech Support).
... the red LED flashes (senses motion):
—Turn the light switch ON, if off. The light switch needs to be on for automatic switching to occur.
—If the light switch is on, check for 24VDC at sensor blue wire.
• If present, check wiring connections, if OK—possible power pack problem
(Call Tech Support).
• If 24VDC is not present—possible sensor problem (Call Tech Support).
Override:
Setting DIP switch #6 to on will bypass (override) all the sensor’s occupancy control functions.
Lights can still be manually on/off controlled with a light switch.
Call 800.223.4185 for Technical Support