ABB Uvisor SF910i, Руководство пользователя, Страница: 59 / 190

5 LEDs
SF910i has three LEDs located on top area of the faceplate. Refer to Figure 4.1 for LEDs
location. LEDs are intended as visual feedback devices to help during configuration of
the SF910i (when using transparent-window rear cover), and give immediate visual
feedback of the status of Safe and Flame-relay contacts.
5.1 Power LED
The left most LED is a power indicator that shows a green color when power is applied
to the SF910i .
5.2 Safe LED
The right most LED is a bi-color indicator that illuminates:
– Red when the SF910i internal diagnostic and self-checking circuits determine a fault
or an unsafe condition. When this LED illuminates in red, the corresponding relay
(Safe-relay) will be de-energized. Flame-relay will be de-energized too for safety
reasons.
– Green when the SF910i internal diagnostic and self-checking circuits detects no
problems. In this case, the corresponding relay is energized.
When the Safe-relay is functioning as second Flame-relay or as Quality-relay, or as
internal temperature relay, the status of this LED follows the status of its source. That
is, green when the relay is energized and red when it is de-energized.
5.3 Flame LED
The centrally located LED is a bi-color indicator that illuminates:
– Green when the SF910i internal flame algorithm proves that the flame is present.
In this condition, the corresponding relay (Flame-relay) is energized.
– Red when there is no flame (independently from the flame), if the internal diagnostic
detects a problem (see
Section 5.2 above).
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5 LEDs
5.1 Power LED