Scantronic 808 Installationshandbuch PDF herunterladen (Seite 30)

30

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Symptom Possible Causes Possible Solution

Problems indicated on the STU Status LEDs

Red STU Status

LED

Fast flash.

a) NVM not fitted.

b) NVM

unprogrammed.

c) NVM wrong way

around.

d) NVM leg bent

under.

e) The NVM has been

removed from the

STU.

a), b), c) Insert correctly programmed

NVM.

d) Refit NVM.

e) Power down, insert the NVM and re-

apply power to the STU. Ask the ARC

to commission the STU again.

When an alarm is

triggered the

number of

outstanding

alarms does NOT

increase.

The red STU

Status LED is off

or the number of

flashes of the red

LED stays the

same. The

green STU

Status LED

intermittent

flash.

a) An alarm previously

transmitted on the

same channel has not

been acknowledged

by the ARC.

b) The NVM has been

incorrectly

programmed and the

alarm channel has

been disabled by

mistake.

a) Ask the ARC to acknowledge any

outstanding alarms.

b) Re-program the NVM.

The red STU

Status LED

flashes up to

eight times after

every other flash

of the green STU

Status LED.

Each red LED flash

represents an

outstanding alarm.

a) Alarm input/s may

be incorrectly wired.

b) Alarm information

may be programmed

incorrectly in the

NVM.

a) Check/correct the alarm input wiring.

b) i) Re-configure alarm settings.

ii) Re-program the NVM.

Green STU

Status LED fast

flash.

Power supply and/or

battery voltage is too

low.

Check the operation of the power

supply. Check that the back up battery

is charged.

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