Technical data

VLT
®
2800 Series
when the motor frequency is reduced too quickly
due to ramp down time being too short. When
the inverter is switched off a trip reset is generated.
Note: Voltage warning high (warning 5) will thus
also be able to generate an alarm 7.
WARNING/ALARM 8: Undervoltage
If the intermediate circuit voltage (UDC) is lower
than the inverter’s Undervoltage limit the inverter
will be switched off until the UDC once more goes
above the undervoltage limit. If the UDC remains
under the undervoltage limit , the inverter will trip
after a set time. The time depends on the device,
and is set at 2 - 15 sec. An undervoltage can
occur when the connected mains voltage is too low.
Check whether the supply voltage is suitable for
the frequency converter, see Technical data.When
the frequency converter is switched off a alarm 8
(and alarm 6) is displayed briefly and a trip reset is
generated. Note: Voltage w arning low (warning 6)
will thus also be able to generate an alarm 8.
WARNING/ALARM 9: Inverter overload
Electronic thermal inverter protection indicates that
the frequency converter is close to tripping due
to overloading (output current too high for too
long). The counter for electronic thermal inverter
protection gives a warning at 98% and trips at
100% accompanied by an alarm. The frequency
converter cannot be reset until the counter drops
below 90%. This fault arises because the frequency
converter has been overloaded for too long.
WARNING/ALARM 10: Motor overloaded
According to the electronic thermal inverter protection
the motor is too hot. In parameter 128 the user can
select whether the frequency converter should emit
a warning or an alarm when the counter reaches
100%. This fault is due to the motor being overloaded
by more than 100% for too long. Check that motor
parameters 102-106 are set correctly.
WARNING/ALARM 11: Motor thermistor
The motor is too hot or the thermistor/thermistor
connection has been disconnected. In parameter
128 Thermal motor protection the user can select
whether the frequency transformer emits a warning or
an alarm. Check that the PTC thermistor is correctly
connected between terminals 18, 19, 27 or 29 (digital
input) and terminal 50 (+ 10 V supply).
WARNING/ALARM 12: Current limit
The output current is greater than the value in
parameter 221 Current Limit
LIM
, and the frequency
converter will trip after a set time, selected in
parameter 409 Trip delay overcurrent.
WARNING/ALARM 13: Overcurrent
The inverter’s peak current limit (approx. 200%
of rated output current) has been exceeded. The
warning will last approx. 1-2 sec, and the frequency
converter will then trip and emit an alarm. Switch
off the frequency converter and check whether the
motor shaft can be turned, and whether the size of
the motor is suitable for the frequency converter.
ALARM 14: Earth fault
There is a discharge from the output phases to earth,
either in the cable between the frequency converter
and the motor, or in the motor. Turn off the frequency
converter and remove the earth fault.
ALARM 15: Switch mode fault
Fault in switch mode power supply (internal supply).
Contact your Danfoss supplier.
ALARM: 16: Short-circuit
There is a short-circuit on the motor terminals or
in the motor. Disconnect the mains supply to the
frequency converter and remove the short-circuit.
WARNING/ALARM 17: Serial commu-
nication timeout
There is no serial communication to the frequency
converter. The warning will only be active when 514
Bus timeout function is set to a value other than OFF. If
parameter 514 Bus timeout function is set to Stop and
trip [5], it will first give a warning and then ramp down
and trip out accompanied by an alarm. Parameter
513 Bus timeout can if required be increased.
WARNING/ALARM 18: HPFB bus timeout
There is no serial communication to the frequency
converter’s communication option card. This warning
will only be active when parameter 804 Bus timeout
function is set to a value other than OFF. If parameter
804 Bus timeout function is set to Stop and trip,it
will first give a warning and then ramp down and
trip out accompanied by an alarm. Parameter 803
Bus timeout can if required be increased.
WARNING 33: Out of frequency range
This warning is active if the output frequency has
reached Output frequency low limit (parameter 201)
or Output frequency high limit (parameter 202). If the
frequency converter is in Process regulat ion, closed
loop (parameter 100) the warning will be active in the
display. If the frequency converter is in another mode
than Process regulation, closed loop, bit 008000 Out
of frequency range in extended status word will be
active, but there will not be a warning in the display.
MG.28.A9.02 - VLT is a registered Danfoss trademark
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