Danfoss VLT Automation Drive FC 300 Operating Instructions Manual page 127

®
VLT Automation Drive FC 300
Operating Instructions High Power
WARNING/ALARM 8, DC under-voltage:
If the intermediate circuit voltage (DC) drops below the "voltage warning
low" limit (see table above), the frequency converter checks if 24 V back-
up supply is connected.
If no 24 V backup supply is connected, the frequency converter trips after
a given time depending on the unit.
To check whether the supply voltage matches the frequency converter,
General Specifications
see .
WARNING/ALARM 9, Inverter overloaded:
The frequency converter is about to cut out because of an overload (too
high current for too long). The counter for electronic, thermal inverter
protection gives a warning at 98% and trips at 100%, while giving an
alarm. You cannot reset the frequency converter until the counter is be-
low 90%.
The fault is that the frequency converter is overloaded by more than
100% for too long.
WARNING/ALARM 10, Motor ETR over temperature:
According to the electronic thermal protection (ETR), the motor is too hot.
You can choose if you want the frequency converter to give a warning or
an alarm when the counter reaches 100% in par. 1-90. The fault is that
the motor is overloaded by more than 100% for too long. Check that the
motor par. 1-24 is set correctly.
WARNING/ALARM 11, Motor thermistor over temp:
The thermistor or the thermistor connection is disconnected. You can
choose if you want the frequency converter to give a warning or an alarm
when the counter reaches 100% in par. 1-90. Check that the thermistor
is connected correctly between terminal 53 or 54 (analog voltage input)
and terminal 50 (+ 10 V supply), or between terminal 18 or 19 (digital
input PNP only) and terminal 50. If aKTY sensoris used, check for correct
connection between terminal 54 and 55.
WARNING/ALARM 12, Torque limit:
The torque is higher than the value in par. 4-16 (in motor operation) or
the torque is higher than the value in par. 4-17 (in regenerative opera-
tion).
WARNING/ALARM 13, Over Current:
The inverter peak current limit (approx. 200% of the rated current) is
exceeded. The warning will last approx. 8-12 sec., then the frequency
converter trips and issues an alarm. Turn off the frequency converter and
check if the motor shaft can be turned and if the motor size matches the
frequency converter.
If extended mechanical brake control is selected, trip can be reset exter-
nally.
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 itself.
Turn off the frequency converter and remove the earth fault.
ALARM 15, Incomplete hardware:
A fitted option is not handled by the present control board (hardware or
software).
ALARM 16, Short-circuit:
There is short-circuiting in the motor or on the motor terminals.
Turn off the frequency converter and remove the short-circuit.
WARNING/ALARM 17, Control word time-out:
There is no communication to the frequency converter.
The warning will only be active when par. 8-04 is NOT set to
If par. 8-04 is set to
converter ramps down until it trips, while giving an alarm.
par. 8-03
WARNING 22, Hoist Mech. Brake:
Report value will show what kind it is.
0 = The torque ref. was not reached before timeout.
1 = There was no brake feedback before timeout.
WARNING 23, Internal fan fault:
The fan warning function is an extra protection function that checks if the
fan is running / mounted. The fan warning can be disabled in
tor
WARNING 24, External fan fault:
The fan warning function is an extra protection function that checks if the
fan is running / mounted. The fan warning can be disabled in
tor
WARNING 25, Brake resistor short-circuited:
The brake resistor is monitored during operation. If it short-circuits, the
brake function is disconnected and the warning appears. The frequency
converter still works, but without the brake function. Turn off the fre-
quency converter and replace the brake resistor (see par. 2-15
Check
ALARM/WARNING 26, Brake resistor power limit:
The power transmitted to the brake resistor is calculated as a percentage,
as a mean value over the last 120 s, on the basis of the resistance value
of the brake resistor (par. 2-11) and the intermediate circuit voltage. The
warning is active when the dissipated braking power is higher than 90%.
If
out and issues this alarm, when the dissipated braking power is higher
than 100%.
ALARM/ WARNING 27, Brake chopper fault:
The brake transistor is monitored during operation and if it short-circuits,
the brake function disconnects and the warning comes up. The frequency
converter is still able to run, but since the brake transistor has short-
circuited, substantial power is transmitted to the brake resistor, even if it
is inactive.
Turn off the frequency converter and remove the brake resistor.
This alarm/ warning could also occur should the brake resistor overheat.
Terminal 104 to 106 are available as brake resistor. Klixon inputs, see
section Brake Resistor Temperature Switch.
ALARM/WARNING 28, Brake check failed:
Brake resistor fault: the brake resistor is not connected/working.
ALARM 29, Heatsink temp:
The maximum temperature of the heatsink has been exceeded. The tem-
perature fault will not be reset until the temperature falls below a defined
heatsink temperature. The trip and reset point are different based on the
drive power size.
The fault could be:
OFF .
MG.33.U2.02 - VLT ® is a registered Danfoss trademark
6. Warnings and Alarms
Stop Trip
and , a warning appears and the frequency
Control word Time-out Time could possibly be increased.
, par. 14-53, (set to [0] Disabled).
, par. 14-53, (set to [0] Disabled).
).
Trip
[2] has been selected in par. 2-13, the frequency converter cuts
Warning: There is a risk of substantial power being
transmitted to the brake resistor if the brake transistor
is short-circuited.
- Ambient temperature too high
- Too long motor cable
Fan Moni-
Fan Moni-
6
Brake
127