10
Chapter 2. Installation and Wiring
z
Front connector terminals
No. Function
25 FV+ Flame voltage output (+)
26 FV− Flame voltage output (−)
27 DA RS-485 (DA)
28 DB RS-485 (DB)
29 SG RS-485 (SG)
30 − Not used
31 − Not used
32 − Not used
33 − Not used
34 − Not used
35 − Not used
z
LED indication
Name Code Color Function
7-segment LED − Green
When normal: operating status code/ flame voltage/
event code
When an error occurs: alarm code
/ flame voltage
FLAME FL Green Lit when flame signal is detected, OFF when flame
signal is off.
SHUTTER SHUT Green LED is ON when the flame detection circuit is being
checked.
ALARM AL Red ON when fault stop occurs, OFF when there is no
fault stop.
While contact reset input is not accepted, the alarm
LED blinks.
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