VLT
®
4000 VT
All about VLT 4000
VT
to
Stop and trip,
the VLT AFD will first give off an alarm,
then ramp down and finally trip while giving off an alarm.
Parameter 803
Bus time interval
could possibly
be increased.
WARNING 19
Fault in the EEprom on the power card
(EE ERROR POWER)
There is a fault on the power card EEPROM. The VLT
AFD will continue to function, but is likely to fail at the
next power-up. Contact your Danfoss supplier.
WARNING 20
Fault in the EEprom on the control card
(EE ERROR CONTROL)
There is a fault in the EEPROM on the control card. The
VLT AFD will continue to function, but is likely to fail at
the next power-up. Contact your Danfoss supplier.
ALARM: 22
Auto-optimisation not OK (AMA FAULT)
A fault has been found during automatic motor
adaptation. The text shown in the display
indicates a fault message.
NOTE
AMA can only be carried out if there are
no alarms during tuning.
CHECK 103, 105 [0]
Parameter 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
(parameter 105) must be higher than 35% of the
rated output current of the VLT AFD.
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 resistance 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 AFD.
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 AFD 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.
ALARM 29
Heat sink temperature too high (HEAT
SINK OVER TEMP.):
If the enclosure is Chassis or NEMA 1, the cut-out
temperature of the heat-sink is 90°C. If NEMA 12 is
used, the cut-out temperature is 80°C.
The tolerance is ± 5°C. The temperature fault
cannot be reset, until the temperature of the
heat-sink is below 60°C.
The fault could be the following:
-
Ambient temperature too high
-
Too long motor cable
-
Too high switching frequency.
ALARM: 30
Motor phase U missing (MISSING MOT.PHASE U):
Motor phase U between VLT AFD and motor is missing.
Turn off the VLT AFD and check motor phase U.
MG.40.A7.22 - VLT is a registered Danfoss trademark
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