EBL512 G3 V. 3.0.X
- FIRE ALARM SOLUTIONS OPERATING INSTRUCTIONS
106
31.3. SERVICE MODE FOR COM-LOOP (H5/A3)
This mode can be used when commissioning an installation and by maintenance. The COM loop communication (polling) will be
turned off but there is still voltage (24 V DC) on the loop in the A-direction only, in the B-direction only or in both directions at the
same time.
A volt meter can be used, e.g. to check the voltage / voltage drop on different places on the loop or to find a single break on the
loop. (Since there is voltage on the loop, short circuit isolators will work normally.) It is recommended to do this check also when
EBL512 G3 is power supplied via the backup battery only, since the battery voltage can be different (compared with the rectifier
voltage) due to the battery condition, backup duration, etc.
The "Service mode for COM-loop" is indicated by LED Fault / Disablements "General disablements" and the symbol
is flashing.
If the user stays in this menu window, without doing any actions, there will be a timeout after 1 hour, and the user is logged off. If the
user logs off this menu, the "Service mode for COM-loop" will be terminated automatically.
If short-circuit is detected when a COM loop is in service mode, the loop will be disabled and a fault mes
-
sage will be displayed:
FAULT: Short-circuit Tech addr A <-> B,
loop x, control unit xx
…independent of where the short-circuit is situated on the loop.
a) Log on to the c.i.e.
b) Navigate to menu A3.
c) Write loop number and control unit number.
d) Press or to scroll between:
- A Direction
- B Direction
- Both
e) To exit the menu press
or ESC
.
When you leave this menu by pressing ESC or
the service mode will be turned off, and the communication will be turned on in
the normal way.
Service mode for loop:
0
CU: 00
A Direction
B Direction
Both
