DAB AD 2.2 AC Instruction For Installation And Maintenance page 99

5. POWER-UP AND START-UP
5.1 Initial power-up operations
On correct completion of installation of the hydraulic and electrical system (see chapter 2 INSTALLAZIONE) and after reading the
entire manual, the inverter can be powered up. Only in the case of initial power-up, after the initial presentation, the display shows the
error condition "EC" with the message informing the user to set the parameters required for control of the electric pump; the inverter
does not start up. To unlock the unit, simply set the rated current value [A] of the electric pump used. Before start-up, if the system
pump requires special settings, other than the default versions (see par. 8.2) first make the modifications required and then set the
rated current value, to ensure start-up with the correct settings. The parameters can be set at any time, but it is recommended to follow
this procedure when the application is in operating conditions that may impair integrity of the system components, such as in the case
of pumps with a minimum frequency limit or do not tolerate certain dry running times etc.
The following steps apply both in the case of systems with a single inverter and multi-inverter systems. In the case of multi inverter
systems, the relative connections of sensors and communication cables must be made, after which one inverter at a time must be
activated, performing the initial power-procedure for each. Once all inverters are configured, all multi-inverter system elements can be
powered up.
5.1.1 Rated current settings
From the page displaying the message EC, or more in general from the main menu, access the Installer menu by pressing and holding
the buttons "MODE" & "SET" & "- " simultaneously until "RC" appears on display. In these conditions, buttons + and – enable
respectively increase and decrease of the parameter value. Set the current as specified in the manual or on the electric pump dataplate
(for example 8.0 A).
After setting the RC value and enabling it by pressing SET or MODE, if all elements have been installed correctly, the inverter starts
up the pump (unless error, blocking or protection conditions do not occur).
CAUTION: THE INVERTER STARTS UP THE PUMP AS SOON AS THE RC PARAMETER HAS BEEN SET.
5.1.2 Rated frequency settings
From the installer menu (if the RC value has just been entered, this is the same page; otherwise access as described in the above
section 5.1.1) press MODE and scroll through the menus to FN. Set the frequency using buttons + and - as specified in the manual or
on the electric pump dataplate (for example 50 [Hz]).
Incorrect settings of the parameters RC and FN, or improper connections can generate the errors "OC", "OF"
and in the case of operation without the flow sensor, may generate the false errors "BL". Incorrect settings of
the parameters RC and FN can also cause failure of the current sensitivity protection device, leading to loads
exceeding the safety threshold of the motor, with consequent damage to the latter.
Incorrect configuration of the electric motor with star or delta connection may cause damage to the motor.
Incorrect configuration of the operating frequency of the electric pump can cause damage to the latter.
5.1.3 Setting the direction of rotation
Once the pump has started up, the user must ensure that the direction of rotation is correct (the direction is usually indicated by
an arrow on the pump casing). To start up the motor and check the direction of rotation, simply switch on a utility.
From the same menu as RC (MODE SET – "Installer menu") press MODE and scroll through the menus to RT. In these conditions,
buttons + and – enable the user to invert the direction of motor rotation. The function is also enabled when the motor is running.
If it is not possible to see the direction of motor rotation, proceed as follows:
Method to check rotation frequency
- Access parameter RT as described above.
- Turn on a utility and observe the frequency that is shown on the status bar at the bottom of the utility control page, to ensure that the
operating frequency is less than the rated frequency of the pump FN.
- Without changing collection, modify parameter RT by means of buttons + or – and check frequency FR again.
- The correct RT parameter is that which requires, compared to collection, a lower frequency FR.
ENGLISH
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