LEDs 
 
15. MAINS VOLTAGE PRESENT:  GREEN LED is on, if voltage on the mains 
terminals is present (in SPI and SPtM). LED is not active in MINT, COX. 
   
16. MAINS FAILURE: RED LED starts flashing when the mains failure occurs 
and gen-set does not run, goes to steady light when the gen-set starts and 
goes off when the mains restores. 
17. GEN VOLTAGE PRESENT:   GREEN LED is on, if gen. voltage is present 
and within limits. 
18. GEN-SET FAILURE:   RED LED starts flashing when any failure occurs. 
After FAULT RESET button is pressed, goes to steady light (if an alarm is 
still active) or is off (if no alarm is active). 
19. GCB ON: GREEN LED is on, if GCB feedback is active. Flashes during 
synchronizing. 
20. MCB ON: GREEN LED is on, if MCB feedback is active. Flashes during 
reverse synchronizing (synchronizing of the loaded gen-set back to the 
restored mains).  
21. Bus – GREEN LED is on if bus voltage is present and within limits. 
 
 
InteliSysNT Basebox pushbuttons and LEDs 
 
 
 
 
 
 
 
InteliVision 5, InteliVision 8 – Operator guide, ©ComAp – January 2014   
IGS-NT Operator Guide 01-2014.pdf 
 
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