VLT
®
5000 Series
How to perform an AMA
1. Press the [STOP/RESET] key
2. Set motor nameplate data in parameters 102 to
106
3. Select whether a total [ENABLE (RS,XS)]or a
reduced [ENABLE RS] AMA is required in param-
eter 107
4. Connect terminal 12 (24 VDC) to terminal 27 on
the control card
5. Press the [START] key or connect terminal 18
(start) to terminal 12 (24 VDC) to start the auto-
matic motor adaptation.
Now the automatic motor adaptation goes through
four tests (for reduced AMA only the first two tests).
The different tests can be followed in the display as
dots after the text WORKING in parameter 107:
1. Initial error check where nameplate data and
physical errors are checked. Display shows
WORKING.
2. DC test where the stator resistance is estimated.
Display shows WORKING..
3. Transient test where the leakage inductance is
estimated. Display shows WORKING...
4. .AC test where the stator reactance is estimated.
Display shows WORKING....
NB!:
AMA can only be car-
ried out if there are n
o alarms during tuning.
Discontinue AMA
If the automatic motor adaptation is to be discontin-
ued, press the [STOP/RESET] key or disconnect
terminal 18 from terminal 12.
The automatic motor adaptation ends up with one of
the following messages after the test:
Warnings and alarm messages
ALARM 21
Auto-optimisation OK
Press the [STOP/RESET] key or disconnect terminal
18 from terminal 12. This alarm indicates that the
AMA is OK and that the drive is correctly adapted to
the motor.
ALARM 22
Auto-optimisation not OK
[AUTO MOTOR ADAPT OK]
A fault has been found during automatic motor adap-
tation. Press the [STOP/RESET] key or disconnect
terminal 18 from terminal 12. Check the possible
cause to the fault related to the alarm message
given. The figure after the text is the error code,
which can be seen in the fault log in parameter 615.
Automatic motor adaptation does not update param-
eters. You may choose to run a reduced automatic
motor adaptation.
CHECK P.103,105 [0]
[AUTO MOT ADAPT FAIL] Parameter 102, 103 or
105 has a wrong setting. Correct the setting and
start AMA all over.
LOW P.105 [1]
The motor is too small for AMA to be carried out. If
AMA is to be enabled, the rated motor current (pa-
rameter 105) must be higher than 35% of the rated
output current of the VLT frequency converter.
ASYMMETRICAL IMPEDANCE [2]
AMA has detected an asymmetrical impedance in
the motor connected to the system. The motor could
be defective.
MOTOR TOO BIG [3]
The motor connected to the system is too big for
AMA to be carried out. The setting in parameter 102
does not match the motor used.
MOTOR TOO SMALL [4]
The motor connected to the system is too small for
AMA to be carried out. The setting in parameter 102
does not match the motor used.
TIME OUT [5]
AMA fails because of noisy measuring signals. Try
to start AMA all over a number of times, until AMA is
carried out. Please note that repeated AMA runs
may heat the motor to a level where the stator resis-
tance RS is increased. In most cases, however, this
is not critical.
INTERRUPTED BY USER [6]
AMA has been interrupted by the user.
INTERNAL FAULT [7]
An internal fault has occurred in the VLT frequency
converter. Contact your Danfoss supplier.
LIMIT VALUE FAULT [8]
The parameter values found for the motor are out-
side the acceptable range within which the VLT
frequency converter is able to work.
MOTOR ROTATES [9]
The motor shaft rotates. Make sure that the load is
not able to make the motor shaft rotate. Then start
AMA all over.
MG.51.A1.02 - VLT is a registered Danfoss trade mark
91
Special functions
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