34
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
Keys for programming and control
The following buttons are available on the control pa-
nel of the frequency converter for the purpose of
programming and control:
■
This key is used for switching from Display
Mode to Quick Set-up Mode.
If "Menu" is pressed once more, the system
reverts to Display Mode.
The key is also used for switching from Data
Mode to Menu Mode.
This key is used for switching from Menu Mode
to Data Mode or Display Mode.
The key is also used for moving the cursor
between the decimal points of the data values.
The programme automatically leaves Data
Mode after 20 seconds if no operation is
registered.
If the "Data" key is pressed once, it is possible
to revert to Data Mode to program the
parameter that was left after 20 seconds.
These keys are used for scrolling through the
different Menu Modes and their parameters
and for choosing a specific parameter value or
for scrolling parameter data.
Combinations of control panel keys
■
If these keys are pressed simultaneously,
the system switches to Display Mode
from any other Mode.
If these keys are pressed simultaneously,
the system switches to Extended Menu
from any Mode.
If these keys are pressed simultaneously,
the system switches to the Quick Set-up
Menu from any Mode.
The combination of "Menu" with the "+"
and "-" keys must be activated simul-
taneously to avoid unwanted leaps to
other Modes.
3.1 Display and keypad
NB!:
NB!:
NB!:
NB!:
NB!:
The motor must be stopped by pressing
"Stop/Reset" before the data values of certain
parameters are changed.
External H-O-A
(Hand-Off-Auto)
The functions "Local"/"Hand" and "Remote"/
"Auto" can be moved from the operating panel
of the frequency converter to act as an external
control option, where there is no direct physical
access to the frequency converter, see exam-
ple 9, page 32.
Via the control terminals of the frequency con-
verter it is possible to activate "Hand", which
gives the option of controlling the frequency
converter manually by means of a control sig-
nal.
Subsequently, it is possible to switch back to
"Auto", which is the normal remote operating
mode, in which a general control system
regulates the reference.
■
Hand-Off-Auto
“Hand-Off-Auto” is a function description taken over
from the American market.
Hand
"Hand" is a function that focuses on manual opera-
tion.
Off
Off means that the inverter of the frequency converter
has stopped.
Auto
"Auto" is a function in which operation is effected
normally, i.e. via the control terminals of the
frequency converter.
