Alarm/warning limits:
Adjustable frequency
drive:
3 x 380–
500 V
3 x 525–
690 V
[VDC]
[VDC]
Undervoltage
402
553
Voltage warning low
423
585
Voltage warning high
(w/o brake - w/brake)
817/828
1084/1109
Overvoltage
855
1130
The voltages stated are the intermediate circuit voltage of
the adjustable frequency drive with a tolerance of ± 5%.
The corresponding AC line voltage is the intermediate cir-
cuit voltage (DC link) divided by 1.35.
WARNING/ALARM 8, DC undervoltage:
If the intermediate circuit voltage (DC) drops below the “voltage warning
low” limit (see table above), the adjustable frequency drive checks if 24
V backup supply is connected.
If no 24 V backup supply is connected, the adjustable frequency drive
trips after a given time depending on the unit.
To check whether the supply voltage matches the adjustable frequency
drive, see
General Specifications
.
WARNING/ALARM 9, Inverter overloaded:
The adjustable frequency drive is about to cut out because of an overload
(too high current for too long). The counter for electronic, thermal inver-
ter protection gives a warning at 98% and trips at 100%, while giving an
alarm. You cannot reset the adjustable frequency drive until the counter
is below 90%.
The fault is that the adjustable frequency drive is overloaded by more
than 100% for too long.
WARNING/ALARM 10,
Motor ETR overtemperature:
According to the electronic thermal protection (ETR), the motor is too hot.
You can choose if you want the adjustable frequency drive 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 overtemp:
The thermistor or the thermistor connection is disconnected. You can
choose if you want the adjustable frequency drive to give a warning or
an alarm when the counter reaches 100% in par. 1-90. Make sure 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, Overcurrent:
The inverter peak current limit (approximately 200% of the rated current)
is exceeded. The warning will last approximately 8-12 sec., then the ad-
justable frequency drive trips and issues an alarm. Turn off the adjustable
frequency drive and check if the motor shaft can be turned and if the
motor size matches the adjustable frequency drive.
If extended mechanical brake control is selected, trip can be reset exter-
nally.
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
itself.
Turn off the adjustable frequency drive and remove the ground 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 adjustable frequency drive and remove the short-circuit.
WARNING/ALARM 17, Control word timeout:
There is no communication to the adjustable frequency drive.
The warning will only be active when par. 8-04 is NOT set to
OFF
.
If par. 8-04 is set to
Stop
and
Trip
, a warning appears and the adjustable
frequency drive ramps down until it trips, while giving an alarm.
par. 8-03
Control word Time-out Time
could possibly be increased.
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
Fan Moni-
tor
, par. 14-53, (set to [0] Disabled).
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
Fan Moni-
tor
, par. 14-53, (set to [0] Disabled).
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 adjustable
frequency drive still works, but without the brake function. Turn off the
adjustable frequency drive and replace the brake resistor (see par. 2-15
Brake 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 based on the resistance value of the
brake resistor (par. 2-11) and the intermediate circuit voltage. The warn-
ing is active when the dissipated braking power is higher than 90%. If
Trip
[2] has been selected in par. 2-13, the adjustable frequency drive
cuts 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 is issued. The adjustable
frequency drive 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.
VLT
®
Automation Drive FC 300
Instruction Manual High Power
6 Warnings and Alarms
MG.33.U2.22 - VLT
®
is a registered Danfoss trademark
6-5
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