Marco 164 404 15 Instructions For Use Manual page 12

ENG
- 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 for this 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.
An accumulator of at least ½ liter is recommended in case of rigid or short pipes, in order
to increase even more the system's life.
Please mind that no pressure regulators or additional check valves are suggested on
pump's line, as those may interfere with the electronic pressure sensor.
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