Potential-Free Alarm Output; Automatic Inspection; Sleep Mode; Checking The Battery Voltage - Kessel Staufix FKA Standard Installation And Operating Manual

9.1 Potential-free alarm output

The KESSEL control unit for the StaufixFKA
can be fitted or retrofitted with a connection
for a potential-free switch contact.
For this purpose, the additional board (order
no. 80072) is simply connected to the con-
trol unit and the required control line connec-
ted to the terminal clamps. The relay drops
out in the event of backwater or any fault
messages, and when the test key is pressed.
Caution: The potential-free
contact is only approved up to 42 V DC /
0.5 A.
9.2 Automatic inspection of the opera-
ting valve
The motor is automatically checked for
function every 4 weeks. For this, the ope-
rating valve is opened and closed auto-
matically.
Any faults detected are indicated by
means of the respective fault message
and can then be eliminated as described
in chapter 4.
9. Additional functions
9.3 Sleep-Mode
If the control unit has been working by battery
for more than 2 hours, it goes into the so-cal-
led "Sleep mode". This means that the ope-
rating valve flap is closed automatically. Du-
ring sleep mode (flap closed), an optical and
acoustic alarm is given every 20 seconds until
the battery is discharged. At the same time,
the alarm is displayed via the optional poten-
tial-free contact. In sleep mode, the control
unit is in a "resting position". All the displays
switch are switched off. The fault message via the
potential-free contact remains, however.
Once mains voltage is available again, the
control unit returns to normal operation im-
mediately.
This function prevents the battery from being
discharged completely and then no longer
being able to function in the event of a power
failure. This is particularly important during
the construction phase, for example, when
the control unit is installed but not yet conti-
nuously supplied with mains current. In this
case, the FKA is ready for operation thanks to
battery operation, but the battery is not di-
scharged completely.

9.4 Checking the battery voltage

The control unit checks the battery volta-
ge constantly. If the battery voltage falls
to less than 13.5 V during battery opera-
tion, the motor closes the operating valve,
this case is indicated by the power-LED
and the alarm-LED flashing briefly. Please
check the use-by date on both batteries
and replace them by new ones if neces-
sary. To do this, disconnect the control
unit from the mains first. Then disconnect
the two battery connection cables (see
page 14) from the batteries, replace the
batteries and reconnect the new batte-
ries. The used batteries must be disposed
of properly!
Caution: If the control unit has to be
scrapped, remove the batteries first
and dispose of them properly!
New batteries will last at least 2 years.
The following battery is approved for use
with the KESSEL Staufix FKA: Duracell:
Size 9V; Type MN 1604/6LR61 (order no.
197-081; requirements: 2 units)
45