emmeti ETI 2100, Инструкция по установке и эксплуатации, Страница: 28 / 35

40
GB
40
B
A
C
LED signals
Water probe management with three-speed thermostat
If the THIN-TBK board is used with electromechanical thermostats, or
other commercial controls, fitted with a water probe, the H2 probe on
the machine must not be connected and the fan is remote controlled.
If, on the contrary, the command does not include the management
of the water probe, this function can be performed by the board, by
connecting the 10 kΩ probe found in the coil, to the H2 connector of
the board (ref. B).
In this case, the board performs the minimum water temperature
for heating operation and maximum water temperature in cooling
functions and therefore, if the water temperature is not suitable for
active operation (above 20°C in cooling, below 30°C in heating), the
ventilation is stopped and the anomaly is signalled by the single flash
+ pause of the LED (ref. A).
The heating/cooling discriminant is implemented via the SUM-WIN
input (ref. C) of the board: leaving it open, the board goes into heating
mode; closing it, it goes into cooling mode.
If after connecting the probe, it is disconnected or measures incon-
sistent values (e.g. installation of probe 2 kΩ instead of the correct
one of 10 kΩ), the anomaly is signalled with 3 f pause of the
LED (ref. A) and blocked operation.
To confirm operation without the probe, disconnect and re-energise
the board.
This condition will be saved by the board for all subsequent start-ups.
In any case, normal operation with temperature thresholds is restored
when the probe is connected.
The LED (ref. A) is off if the CV input is not closed (stand-by
condition).
It is switched on when the CV contact closes and indicates nor-
mal operation.
• Flashes frequently if the S1 grid safety microswitch is activat-
ed due to the filter cleaning operation.
• Makes a single flash + pause for fan stop alarm due to inade-
quate water (with H2 water probe connected).
• 2 f pause due to motor alarm (for example, jam due
to foreign bodies or fault in the rotation sensor).
• 3 f pause due to disconnected or faulty water probe
alarm.