Danfoss VLT 8000 AQUA series Operating Instructions Manual page 102

- AMA can only be carried out if the rated motor
current of the motor is min. 35% of the rated
out-put current of the frequency converter.
NB!:
Some motors (such as motors with 6 or
more poles) may be unable to run Automatic
Adaptation. Limited AMA or use of parameters
123 and 124 is a procedure which can be effective
in such cases since procedure measures motor's
stator and effects of cable length. Multiple motor
applications cannot use any form of AMA.
Description of choice:
Select Automatic adaptation [1] if the frequency
converter is to carry out a complete automatic motor
adaptation. Select Limited AMA [2] if an LC-filter has
been placed between the frequency converter and
the motor, or for six or more pole motors.
Procedure for automatic motor adaptation:
1. Set the motor parameters in accordance with
the motor nameplate data given in parameters
102-106 Nameplate data.
2. Connect 24 V DC (possibly from terminal 12)
to terminal 27 on the control card.
3. Select Automatic adaptation [1] or Limited AMA [2] in
parameter 107 Automatic motor adaptation, AMA.
4. Start up the frequency converter or connect terminal
18 (start) to 24 V DC (possibly from terminal 12).
If the automatic motor adaptation is to be stopped:
1. Press the [OFF/STOP] key.
After a normal sequence, the display
reads: AMA STOP
1. The frequency converter is now ready for operation.
NB!:
[RESET] key must be pressed after AMA is
completed to save results into drive.
= factory setting. () = display text [] = value for use in communication via serial communication port
102
®
VLT 8000 AQUA
If there is a fault, the display reads: ALARM 22
1. Check for possible causes of the fault in
accordance with the alarm message. See
list of warnings and alarms.
2. Press the [RESET] key to clear fault.
If there is a warning, the display reads:
WARNING 39-42
1. Check for possible causes of the fault in accordance
with the warning. See list of warnings and alarms.
2. Press the [CHANGE DATA] key and select
"Continue" if AMA is to continue despite the
warning, or press the [OFF/STOP] key to stop
the automatic motor adaptation.
108 Variable Torque Starting Voltage
(VT START VOLT)
Value:
0.0 - parameter 103 Motor voltage, U
depends on par. 103 Motor voltage, U
Function:
This parameter specifies the start-up voltage for
VT characteristics at 0 Hz. It is also used for
motors connected in parallel.
The start-up voltage represents a supplementary
voltage input to the motor. By increasing the start-up
voltage, motors receive a higher start-up torque. This
is used especially for small motors (< 4.0 kW/5 HP)
connected in parallel, as they have a higher stator
resistance than motors above 5.5 kW/7.5 HP. This
function is only active if Variable torque [1], [2] or [3] has
been selected in parameter 101 Torque characteristics.
Description of choice:
Set the start-up voltage at 0 Hz. The maximum voltage
depends on parameter 103 Motor voltage, U
109 Resonance damping
(RESONANCE DAMP.)
Value:
0 - 500 %
Function:
High-frequency electric resonance problems between
the frequency converter and the motor can be
eliminated by adjusting the resonance damping.
MG.83.A2.02 - VLT is a registered Danfoss trademark
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