Danfoss VLT 2800 Design Manual page 140

All about VLT 2800
suitable for the adjustable frequency drive, see
chapter 5.3 General Technical Data for further details. When
the adjustable frequency drive is switched off, a brief
warning 6 (and warning 8) appears.
WARNING/ALARM 7: Overvoltage
If the intermediate voltage (UDC) exceeds the Overvoltage
limit of the frequency converter, the inverter is switched
off until the UDC drops below the overvoltage limit. If the
UDC remains above the overvoltage limit, the inverter trips
after a set time. The time depends on the device, and is
set at 5-10 s. An overvoltage in the UDC can occur when
5 5
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. Voltage warning high (warning
5) is 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 is switched off
until the UDC exceeds the undervoltage limit. If the UDC
remains under the undervoltage limit, the inverter trips
after a set time. The time depends on the device, and is
set at 2-15 s. An undervoltage can occur when the
connected mains voltage is too low. Check whether the
supply voltage is suitable for the adjustable frequency
drive. See chapter 5.3 General Technical Data for further
details. When the adjustable frequency drive is switched
off, an alarm 8 (and alarm 6) is displayed briefly and a trip
reset is generated. Voltage warning low (warning 6) is also
able to generate an alarm 8.
WARNING/ALARM 9: Inverter overload
Electronic thermal inverter protection indicates that the
adjustable frequency drive is close to tripping due to
overloading (output current too high for too long). The
counter for electronic thermal inverter protection triggers a
warning at 98% and trips at 100% accompanied by an
alarm. The adjustable frequency drive cannot be reset until
the counter drops below 90%. This fault arises because the
adjustable frequency drive 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 Thermal motor
protection the user can select whether the adjustable
frequency drive 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 ,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).
138
Design Guide
WARNING/ALARM 12: Current limit
The output current is higher than the value in parameter
221 Current Limit
trips 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 lasts
approx. 1-2 s, and the adjustable frequency drive trips and
emits an alarm. Switch off the adjustable frequency drive
and check whether the motor shaft can be turned, and
whether the size of the motor is suitable for the adjustable
frequency drive.
ALARM 14: Ground fault
There is a discharge from the output phases to ground,
either in the cable between the adjustable frequency drive
and the motor, or in the motor. Turn off the adjustable
frequency drive and remove the ground fault.
ALARM 15: Switch mode fault
Fault in switch mode power supply (internal supply).
Contact the 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 adjustable
frequency drive and remove the short-circuit.
WARNING/ALARM 17: Serial communication timeout
There is no serial communication to the adjustable
frequency drive. The warning is only active when
parameter 514 Bus timeout function is set to a value other
than OFF. If parameter 514 Bus timeout function is set to [5]
Stop and trip, it first gives a warning and then ramps down
and trips out accompanied by an alarm. Parameter 513 Bus
timeout can be increased.
WARNING/ALARM 18: HPFB bus timeout
There is no serial communication to the adjustable
frequency drive's communication option card. This warning
is only 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 first gives a warning and
then ramps down and trips 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
the limit set inparameter 201 Output frequency low limit or
parameter 202 Output frequency high limit. If the adjustable
frequency drive is in closed loop opereation, the warning is
active in the display. If the adjustable frequency drive is in
another mode than closed loop, bit 008000 Out of
frequency range in extended status word is active, but
there are no warnings in the display.
WARNING/ALARM 34: HPFB communication fault
Communication fault only occurs in Fieldbus versions.
Regarding alarm type, refer to information about
parameter 953.
Danfoss A/S © Rev. May/2014 All rights reserved.
, and the adjustable frequency drive
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MG27E402