If you have a specific problem with your unit, I can help you more if you tell me: Is the currently lit? Is the Red status LED on or off? What is the current Lux setting on your dial?
This guide serves as a comprehensive manual for the installation, programming, and troubleshooting of the Multi 9 IC 2000 P. Technical Specifications and Overview
This suggests the internal relay is functioning, but there is a fault in the lighting circuit or a blown fuse/breaker downstream.
These are the dry contact outputs (Normally Open). Connect your lighting load circuit here.
Install the photo-electric cell outdoors. It must be positioned away from the lights it controls to avoid "cycling" (turning off because it sees its own light). Wiring the Terminals: Terminals 1 & 2: Connect to the 230V AC power supply.
Snap the IC 2000 P onto a standard DIN rail inside your electrical distribution board. Ensure the environment is dry and ventilated.
Test for a short circuit in the wiring between terminals 6 and 7. Check the Green LED for power supply.
Verify the Red LED turns on when you cover the sensor manually with your hand or a dark cloth (wait 80 seconds for the delay).