Cooper Lighting & Safety FX251D remote indicator of conventional detector can be configured to operate as either an optical detector, opto/heat multi-sensor or 1 of 3 heat detector modes (A1R, BS, CS) using the four position switch located at the back of the detector. The detector, having self check facilities, has a dual LED indicator. The red LED is continuous to indicate alarm condition, the yellow LED is lit continuously to indicate a smoke sensing chamber fault or that the detector has reached the limit of its contamination compensating ability. This LED can also be pulsed from the panel to locate wiring faults thereby saving time and cost by facilitating the fault finding process.