Instruction manual V 2.3
23
PWM 230 - PWM 400 - PWM 400/7.5
Instruction manual
4
START AND FIRST OPERATION
4.1 Start up operation
After a craftsmanlike installation of the hydraulic and electric systems (see sec. 2.1 and 2.2), we can turn on
the PWM.
“ZF” will appear on the display and after a few seconds the error code “EC” will be displayed. The PWM
doesn’t start, since it is necessary to set the value of rated current (in A) and frequency (in Hz) of the
electrical pump being used.
The procedures needed to set the main parameters and to perform the first start-up are described below.
a) Setting the rated current.
From the state of normal operation, simultaneously hold the
keys pressed until “rC”
is displayed. Use the
and
keys to set the rated current of the motor in Ampere (A).
Generally the absorbed current value (in A) in the different usage configurations (delta / star) is indicated
on the pump’s rating plate.
For PWM 230, the motor must be configured to operate with a 230V three phases system (normally with
a star wiring). The current to set refers to 230V operation.
For PWM 400 and PWM 400/7.5 the motor must be configured to operate with a 400V three-phase
system (normally with a star wiring if power is less than 5,5 KW, with a delta wiring for higher power).
The rated current parameter to set refers to 400V operation.
Note:
If the set parameter is lower than the correct one, the “oC” error code will be
displayed as soon as current will exceed the set current for enough time.
If the set parameter is higher than the correct one, the amperometric protection will
be activated when current is already beyond the motor’s safety threshold.
Wrong configuration of an electrical pump motor (star or delta) may irreparably
damage the motor.
Warning:
If
is pressed before setting “Fn”, the rated current value is set, but the PWM remains in
the blocked state, because the frequency has not been set yet (see point b) and “EC” is displayed until
the rated frequency is set.
b) Setting the rated frequency Fn
From “rC” parameter mentioned above, press the
key once. The pump’s rated frequency Fn is
displayed.
Set the frequency “Fn” with by pressing the
and
keys until the selected value matches the
electro pump’s rated one (e.g.: 50Hz).
A further pressure of
or
activates the set values of current and frequency and PWM
unblocks (provided that no errors or lock conditions are present).