ELECTRONIC PRESSURE SENSOR WORKING DIRECTIONS
The electronic pressure sensor, through the use of a microprocessor, controls the pump's speed to
obtain the needed flow rate, with the following advantages:
- Noise reduction during operation
- The optimization of current consumption
- A strong reduction of electrical noise, thanks to the slow speed ramp up and
ramp down of the motor.
- A longer life for the whole system, thanks to less wear of pump parts
compared to conventional mechanical pressure switches.
The pressure sensor system is equipped with two LEDs: one blue and one multicolored (red, green,
and yellow).
During normal operation, the blue LED will:
- Turn on if there's liquid in the hoses.
- Turn off when there's no liquid in the hoses.
- Flash when in priming mode. The first time it senses water it keeps flashing
for 10 seconds to make sure that the water is being pumped correctly and
continuously.
If the pump goes more than five times from "priming" to "no liquid"
(blue led off) the circuit turns everything off anyway, to protect the motor
and the gears from running without liquid.
The multicolored LED signals:
- With solid yellow LED, that the pressure in the hoses is not the required
pressure, but the pump is trying to reach it.
- With solid green LED, that the pump has reached the target pressure, there
is still liquid demand, but the pump's speed won't be changed because the
flow rate is constant.
- With flashing green LED, the pump has reached the target pressure and
there is no liquid demand, it's in stand-by with the motor off.
- With solid or slowly flashing red LED, the motor has been short circuited,
something may have blocked the gears or there could be a problem in the
connection between the pump and circuit. The red LED flashes for 30
seconds, after which the pump is re-fed up to a maximum of 3 attempts.
On the fourth attempt, the LED remains solid red, the pump is off and should
be checked for possible permanent damage.
To reset this warning you need to reboot the circuit or press the Reset button
on the control panel, if present.
- With fast flashing red LED, the pump is being overloaded (due to viscous liquids or gears
overheating). While the pump is running, the speed is reduced to keep the current up to
the nominal value for 30 seconds, period after which the circuit tries to release again
the motor to its normal operating speed.
If an overload happens again, the circuit tries three time to lower the speed and it turns
the pump off. Please check that the liquid being pumped is correct for the chosen pump
and that the gears move freely without problems.
To reset this warning you have to reboot the circuit or press the Reset button on the control
panel, if present.
There are two warnings that use both LEDs:
- Red and blue LED that blink alternatively, signal that the pump has run one and a half minute
without liquid and the motor has been stopped forth is reason. To reset this warning you have
to reboot the circuit or press the Reset button on the control panel, if present.
- Yellow and blue LED that blink together indicate that the power supply is providing the wrong
voltage. Please check to have the correct wire section for the power supply and a charged
battery, if present.
- Steady red and blinking Blue indicate that the pump has run for more than two hours at very
low speeds and that the motor has been stopped to prevent overheating. To reset this
warning you have to reboot the circuit or press the Reset button on the control panel, if
present.
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