4. Indications and Controls
4.1 Indicators
When the detector is switched on the LED indicator flashes briefly to signify power-up. During the first 10-seconds the detector 
will latch the fault condition and the Detector/P-UIM will require resetting once the beam path is clear.  
4.1.1 DETECTOR 
DETECTOR – Red LED:   Low Level Alarm - The LED pulses 0.5 sec ON, 0.5 sec OFF for 30 seconds. 
      High Level Alarm - The LED pulses 0.25 sec ON, 0.25 sec OFF for 2 minutes. 
      Life Fault – The LED is ON if the beam is blocked on power-up or reset and the detector fails to calibrate.
4.1.2 P-UIM
OUTPUT ON - Green LED: Indicates the supply is healthy. It extinguishes during the reset period. 
OPEN – Red LED:     Is lit when the detector connection is open circuit. 
SHORT – Red LED:    Is lit when the detector connection is short circuit. 
LIFE – Red LED:     Is lit flashing to indicate the P-UIM and Detector are both healthy. 
    Is lit steady to indicate a life fault 
    Is off for all other fault and alarm conditions. 
CLEAN – Red LED:      Is lit when a cleaning fault condition has been detected. 
BEAM BLOCKED – Red LED:     Is lit when a beam-blocked condition has been detected. 
LOW – Red LED:    Is lit when a Low Level Alarm has been detected. 
HIGH – Red LED:     Is lit when a High Level Alarm has been detected.
4.2 Controls
4.2.1 P-UIM 
   
RESET (Top Panel):    Pressing the RESET pushbutton will cause the system to restart. 
RESET (Remote Input):     The RESET input should be connected to the 24 V supply via a normally closed contact. 
        Open the reset contact for <1 sec will cause the P-UIM to reset. 
        Open the reset contact for >1 sec and <4 sec will cause the P-UIM and the IR Detector to  
    reset. 
        Open the reset contact for >4 sec will cause a fault. 
4 / 12