Possible Malfunctions - Italtecnica Sirio Universal Manual De Programación

 POSSIBLE MALFUNCTIONS:
When one of the taps / outlets in the system is opened, the pump does not start, or there is a few seconds delay before it starts
The DeltaP value is set too high or a check valve has been fitted downstream of the device. Try to increase the value of the start-up pressure
Pmin and eliminate any valves after the Sirio. Ensure correct operation of the external enabling contact.
When the taps / outlets are closed, the pump stops but restarts a few seconds later and there is no leakage from the system
Dp start" value is too low, increase it.
The pump keeps switching on and off
There is leakage in the system. Check the various hydraulic connections. Check the display for pressure drops when the taps are closed.
Check the Sirio's check valve for dirt which could be preventing it from closing properly and, if necessary, clean it with compressed air.
The device often signals 'dry running'
The pump intake pipe drains when the system is not used for some time, thereby preventing it priming the next time it is started. If there is a
foot valve fitted, check its seal.
The device often signals 'high or low voltage'
The power supply voltage may not comply with the device specifications; have it checked by qualified personnel.
 The device overheats and the over-temperature protection intervenes
The inverter no longer exchanges heat with the water that runs through the device or the temperature of the fluid pumped is t oo high; check
for foreign bodies that block the flow of water and if necessary have the device checked by the manufacturer.
When the water flow is extremely low, the pump does not operate normally
The flow values are too low and as the device is unable to detect them, it shuts down the motor pump. Fit a small surge tank (1-2 litres) in the
system to give it more flexibility and reduce the number of restarts.
The pump does not stop
There is substantial leakage in the system or the check valve on the device is jammed by dirt; try moving the check valve with your fingers
and checking that the spring can maintain the seal.
The sensor which detects the valve position is broken. Have the device checked by the manufacturer.
The pump is running at top speed but performance levels are low
The pump or the capacitor connection is not correct: check the electric wiring.
The pump runs in the opposite direction (three-phase model); check rotation direction.
The pump is damaged or there is foreign matter clogging the waterway.
When more water is required of the system, the pressure drops
This is a normal condition which is due to the fact that the device is unable to force the pump above its capacity curve. As a result, once a
certain capacity is reached, the pressure is no longer offset as the pump is already running at the highest number of revolutions allowed. In
these cases, a pump with higher performance levels should be installed.