Hochiki FIRElink-NANO - Manual (Page 5)

FIRElink-NANO Air Sampling Detector – Installation and User Manual Page 5 of 21
© 2010 Hochiki Europe (UK) Ltd 9-5-0-425/ISS1/JUL10
2 Outside the Detector
Front Cover Securing Screw: Leave sufficient clearance below the detector to allow
screwdriver access to this screw.
Fire Alarm: Illuminates to indicate that the smoke level has passed the detector’s Fire 1
threshold, and the normally open FIRE relay contacts have closed.
Pre Alarm: Illuminates to indicate that the smoke level has passed the detector’s Pre Alarm
threshold, and the normally open PRE ALARM relay contacts have closed.
Fault: Illuminates to indicate a Fault condition and that the normally closed FAULT relay
contacts have opened. Three additional LEDs indicate the type of fault:
Flow: Illuminates to indicate an airflow fault. This may be due to blocked or broken pipes,
although it can also occur if, for example, factory warehouse doors are opened on a windy day,
or if industrial air conditioning turns on. Another possible cause is that the aspirating fan
connection cable is damaged or disconnected.
Filter: Illuminates to indicate that the detector’s air filter needs to be changed.
Head: Illuminates to indicate a problem with the detector laser chamber, as might be caused if
the laser head connecting cable is damaged or disconnected. It can also be caused by certain
kinds of internal systems faults, which appear in the detector’s Event Log as “process errors”.
OK: Illuminates to confirm normal operation.