Power-Up And Start-Up; Initial Power-Up Operations; Rated Current Settings; Rated Frequency Settings - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

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.
ENGLISH
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