ENGLISH
52
6.2.1.5
Pump Limits
Figure 24
If the system is not able to bear pressures or flows that are too high, it is possible to impose maximum limits on the
pump control.
The upper settable limits are:
‐
Head H
max
: between 5 m and 16 m, or no limit (
MAX
),
‐
Flow Q
max
: between 10 m
3
/h and 30 m
3
/h, or no limit (
MAX
).
In the factory setting, these limits are not active, and both parameters are set at “
MAX
” (see also the table in chapter
8).
Note: if the upper limits
H
max
and
Q
max
are set at values lower than
“MAX”,
it is possible to set the
setpoints even at values larger than the limits; however, during activation these upper limits will never be
exceeded (self-limitation of the system) and the setpoints may not be reached.
6.2.1.6
Screen adjustment
Figure 25
The LCD screen allows the adjustment of:
‐
backlight,
‐
backlight time, counted from the last time a key was pressed.
The backlight time can vary from 20 sec to 10 min, or it may be “
always
”.
When the backlight is off, the first time any key is pressed has the sole effect of restoring the backlighting.
The factory values are given in chapter 8.
6.2.1.7
Password
The inverter has a protection system with a password, with which it is possible to prevent accidental access, or access
by unauthorized persons, to the control keys and the programmed parameters.
Figure 26
The password value can be set from the menu page:
‐
When the password is “0” (as when leaving the factory), all the keys are unlocked and usable and you can
freely access the various menus and modify all the parameters. The “
key
” symbol appears on the homepage
(
paragraph 3.2
).
‐
When a value other than zero is set in the password field, and confirmed with “
OK
”, the value displayed
becomes “
XXXX
” (hidden) and the protection system is activated. The “
closed padlock
” symbol appears on
the homepage (
paragraph 3.2
).
