Ice AP902, Instruction Manual

Page: 9 / 35

Instruction manual – AP902 Arc Protection Unit 9 (35
)
A1008B
3 O
PERATION AND CONFIGURATION
3.1 LED
INDICATOR FUNCTIONS
AP902 contains 11 indication LEDs. A user definable text pocket can be slid in for
identifying each LED function (except Power and Error LEDs). LED’s are located at the
front plate of the unit for clear viewing without a need for opening doors.
During power up the unit performs a LED-test. All LEDs are turned on for 2 seconds and
then back off. Only the blue power LED will remain on. When powered up, the unit goes
in 50ms into protection mode even while the LED test is being performed.
In normal operation only the blue power LED is ON.
The fiber sensor LEDs in inactive condition are off. If an arc fiber sensor is activated the
corresponding sensor channel LED will turn on if the activation is longer than 1.5ms. The
sensor LED activation function is latched (steady light). To clear the LED the “SET” button
should be pressed.
In case that a fiber sensor connection drops off or configuration mismatch situation is
detected by system self-supervision function (new sensor connected without running auto-
configuration system setup, see chapter 3.3.1) the corresponding LED will start flashing
and the ERROR LED will activate.
The Binary I/O LEDs are indicating the I/O-lines status. If any of the lines become active
for more than 1.5ms the corresponding LED will turn on (latch).
In trip situation the corresponding trip LED will turn on. Trip outputs are controlled by
dipswitch settings. (See chapter 3.5.)
All activation and trip indication LEDs are latched, even if the dipswitch setting is in non-
latched mode. They have to be cleared by pushing the “SET” button.
LED indications are stored in non-volatile EPROM memory for identifying the trip
information in case the auxiliary power is lost. When re-powering the unit after power
supply loss the actual LED status can be visualized from the front of the unit.