ENGLISH
77
See paragraph 18 for the operations to check and adjust the air pressure in the expansion vessel and to replace it if it is broken.
To access the valve of the expansion vessel, proceed as follows:
• remove the access door to the special maintenance compartment (Fig. 1) disengaging the 2 fixing screws with the accessory tool.
It is advisable not to remove the screws completely, so that you can used them to extract the door. Take care not to drop the
screws inside the system once you have removed the door (Fig. 14);
• slip the rubber cap off the valve or the expansion vessel;
• regulate the valve;
• reposition the rubber cap;
• reposition the door and tighten the 2 screws.
19. MOTOR SHAFT
The electronic control of the system ensures smooth starts so as to avoid excessive stress on the mechanical parts and thus prolong
the life of the product. In exceptional cases this characteristic could cause problems in starting the pump: after a period of inactivity,
perhaps with the system drained, the salts dissolved in the water could have settled and formed calcification between the moving part
(motor shaft) and the fixed part of the pump, thus increasing the resistance on starting. In this case it may be sufficient to help the motor
shaft by hand to detach itself from the calcifications. In this system the operation is possible because access to the motor shaft from
outside is guaranteed and a groove is provided at the end of the shaft. Proceed as follows:
• remove the motor shaft access cap;
• insert a straight tip screwdriver in the groove on the motor shaft and manoeuvre, turning in 2 directions;
• if it turns freely, the system can be started;
• if rotation is blocked it cannot be removed by hand, call the assistance service.
20. NON-RETURN VALVE
The system has an integrated non-return valve which is necessary for correct operation. The presence of solid bodies or sand in the
water could cause malfunctioning of the valve and therefore of the system. Although it is recommended to use fresh water and eventually
fit filters on input, if you notice abnormal operation of the non-return valve it can be extracted from the system and cleaned and/or
replaced by proceeding as follows:
• disconnect power supply;
• empty the system;
• remove screws if any;
• with the use of the accessory tool (or with pliers) remove the cap;
• Pull out the valve
• Clean the valve under running water, make sure it is not damaged and replace it if necessary;
Due to the cartridge remaining in its seat for a long time and/or to the presence of sediment, the force needed to extract the cartridge
might be such as to damage the accessory tool. In this case it is intentional, because it is preferable to damage the tool rather than the
cartridge. If the key is lost or damaged, the same operation can be performed with pliers.
Should one or more O-rings be lost or damaged during maintenance operations on the non-return valve, they must be replaced.
Otherwise the system might not work correctly.
21. TROUBLESHOOTING
Before starting to look for faults it is necessary to disconnect the power supply to the pump.
The pump does
not start.
White: off
No electric power
Check whether there is voltage in the socket and insert the
plug again.
The pump does
not start
White: on
Shaft blocked See paragraph 19 (motor shaft maintenance).
The pump does
not start.
White: on
Utility at a level higher than the
system restarting pressure
level (par. 12).
Increase the system restarting pressure level by increasing
SP or decreasing RP.
The pump does
not stop.
White: on
• Impeller or hydraulic part
• Check the system, find and eliminate the leak.
• Dismantle the system and remove the obstructions
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