Nastec HMA Series, Operating Manual, Page: 12 / 20

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6.4 Menu view
Pressing the ENTER key in correspondence with [MENU ’/ ENT to access] in the initial display accesses the menù. To exit the
menu display and return to the initial display, press one of AC or DC buttons.
Installer password required to enter level 1 (default 001)
Installer password required to enter level 1 (default 001)
Installer password required to enter level 1 (default 001)
Installer password required to enter level 1 (default 001)
6.5 Control parameters
Parameter Default Description
M
an
u
al
A
u
to
Fl
o
w
Ti
m
e
Ext. In
p
u
t
MPPT
It is possible to choose between:
• Manual: using the keyboard it is possible to switch from one
power supply to another or even interrupt the power supply.
• Auto: if the radiation falls below a certain value or the power
generated by the panels is not sufficient to operate the pump,
the HMA starts the generator, if present, and exchanges with AC
power. When the irradiation returns above the minimum
threshold, the generator is switched off and the pump is
restarted with DC power. In the absence of a solarimeter, the
HMA exchanges to AC if the DC supply is no longer sufficient to
guarantee pump operation at minimum frequency.
• Flow: the exchange from DC to AC power supply is made
automatically to satisfy the desired daily flow rate. It is also
possible to set a time after which to allow the transition to AC.
• Time: the transition from the photovoltaic power source to the
mains supply (or generator) and vice versa occurs at a time set
by the user.
• Ext. Input: The exchange is controlled by the opening or closing
of digital input 2.
XXXXX
Time setting.
    
MENU’
Control. param.
MENU’
IN/OUT. param.
MENU’
Connect. param.
MENU’
Change init.set.
Switch Mode:

Manual

Auto

Flow

Time

Ext. Input
Current Time
XX h : XX m