Possible Malfunctions - EBARA Press-o-Matic Instrucciones Para El Uso

Press•o•Matic. If this alarm i s often displayed the system should be checked by the installer.

POSSIBLE MALFUNCTIONS:

When one of the cocks in the system is opened, the pump does not start, or there is a few seconds
delay before it starts
The Pmin is set too low or a check val ve has been fitted downstream of the device. Try increasing the
start pressure Pmin and remove all valves fitted downstream of the Press•o•Matic.
When the cocks are closed, the pump stops but restarts a few seconds later and there is no
leakage from the system
The difference between the Pmin and the Pmax i s too low and the drop in pressure that occurs when the
pump stops is sufficient to make it restart. Increase the Pmax value or decrease the Pmin.
The pump keeps switchi ng on and off
There is leak age in the system. Check the various hydrau lic connections. Check the display for pressure
drops when the cocks are closed. Check the Press•o•Matic 's check valve for dirt which could be
preventing it from closing properly and, if necessary, clean it with compressed air.
The device often si gnals '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 frequently signals an inverter error.
The supply voltage may not comply with the equipment specifications; the control must be carried out by
qualified personnel.
The inverter no longer exchanges heat with the water that runs through the device or the temperature of
the fluid pumped is too 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 shu ts do wn 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 sys tem or the check val ve on the de vice is jammed by dirt; try mo ving
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.
Overload: This alarm appears when the absorption of the motor pump is
greater than the maximum current value set (Imax); th is may be caused by
extremely difficult working conditions for the motor pump, problems
related to the motor winding , if the pump is restarted continuously at
short intervals or following problems with the wiring of the motor to the
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