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• Make a note of the values of all the parameters, reset the device with the factory values, see paragraph 8.3. The
reset operation cancels all the parameters of the device, including the password.
• Make a note of the number present on the password page, send a mail with this number to your service centre, in a
few days you will be sent the password to unlock the device.
6.6.21 Password for multipump systems
When the PW is typed in to unlock a device in a set, all the devices are unlocked.
When the PW is changed on a device in a set, all the devices receive the change.
When activating protection with a PW on a device in a set (+ and – on page PW when PW≠0), the protection is
activated on all the devices (to make any change you are asked for the PW).
7 PROTECTION SYSTEMS
The inverter is equipped with protection systems designed to preserve the pump, motor, power line and the inverter
itself. When one or more protections trip, the one with the highest priority is shown on display. Depending on the type
of error, the electric pump may shut down, but when normal conditions are restored, the error state may clear
automatically, immediately or after a set time interval following automatic reset.
In the case of a block due to water supply failure (BL), block due to pump motor current overload (OC), block due to
final output stage current overload (OF), block due to direct short circuit between the phases on the output terminal
(SC), the user can attempt to manually reset the error condition by pressing and releasing buttons + and -
simultaneously. If the error condition persists, the cause of the fault must be located and eliminated.
Alarm in fault log
Display message Description
PD Irregular shutdown
FA Problems with cooling system
Table 29: Allarms
Block conditions
Display message Description
PH Blockage due to short circuit to earth
BL Block due to water failure
BP1 Block due to reading error of the pressure sensor named
LP Block due to low power supply voltage
HP Block due to high internal power supply voltage
OT Block due to overheating of final power stages
OB Block due to overheating of printed circuit
OC Block due to current overload on electric pump motor
OF Block due to current overload on final stages of output
SC Block due to direct short circuit between the phases on the output terminal
ESC Blockage due to short circuit to earth
Table 30: Block information
7.1 Protection systems
7.1.1 Anti-Freeze (Protection against freezing of water in the system)
The change of state of water from liquid to solid involves an increase in volume. It is therefore essential to ensure that
the system does not
remain full of water with temperatures close to freezing point, to avoid breakages of the system.
This is the reason why it is recommended to empty any electropump that is going to remain unused during the winter.
However, this system has a protection that prevents ice formation inside by activating the electropump when the
temperature falls to values close to freezing point. In this way the water inside is heated and freezing prevented.
The Anti-Freeze protection works only if the system is regularly fed: with the plug disconnected or in the
absence of current the protection cannot work.
However, it is advised not to leave the system full during long periods of inactivity: drain the system
accurately and put it away in a sheltered place.
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