Danfoss VLT AutomationDrive FC 300 Instruction Manual page 111

VLT ® AutomationDrive FC 300 Instruction
Manual
WARNING 5, DC link voltage high:
The intermediate circuit voltage (DC) is higher than the overvoltage limit
of the control system. The adjustable frequency drive is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is below the undervoltage limit of
the control system. The adjustable frequency drive is still active.
WARNING/ALARM 7, DC overvoltage:
If the intermediate circuit voltage exceeds the limit, the adjustable fre-
quency drive trips after a time.
Possible corrections:
Connect a brake resistor
Extend the ramp time
Activate functions in par. 2-10
Trip Delay at Inverter Fault
Increase par. 14-26
Alarm/warning limits:
3 x 200–240 V 3 x 380–500 V
[VDC]
Undervoltage 185
Voltage warning 205
low
Voltage warning 390/405
high (w/o brake
- w/brake)
Overvoltage 410
The voltages stated are the intermediate circuit voltage of the ad-
justable frequency drive with a tolerance of ± 5%. The correspond-
ing AC line voltage is the intermediate circuit voltage (DC link) divi-
ded 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
General Specifications
drive, see .
WARNING/ALARM 9, Inverter overloaded:
The adjustable frequency drive is about to cut out because of an overload
(current too high 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 has been 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
Thermal Protection
. The fault is that the motor is overloaded by more
than 100% for too long. Make sure that the motor par. 1-24
rent
is set correctly.
Brake Function
3 x 525–600 V
[VDC] [VDC]
373 532
410 585
810/840 943/965
855 975
Motor
Motor Cur-
®
MG.33.AG.22 - VLT is a registered Danfoss trademark
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
Protection . 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
Mode
(in motor operation) or the torque is higher than the value in
Torque Limit Generator Mode
par. 4-17
WARNING/ALARM 13, Overcurrent:
The inverter peak current limit (approx. 200% of the rated current) is
exceeded. The warning will last approx. 8-12 sec., then the adjustable
frequency drive trips and issues an alarm. Turn off the adjustable fre-
quency 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
Function is NOT set to OFF.
Control Word Timeout Function
If par. 8-04
warning appears and the adjustable frequency drive ramps down until it
trips, while giving an alarm.
Control Word Timeout Time
Par. 8-03
WARNING/ALARM 22, Hst. 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
par. 14-53 Fan Monitor (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 Monitor
par. 14-53 (set to [0] Disabled).
6 Troubleshooting
Motor Thermal
Torque Limit Motor
(in regenerative operation).
Control Word Timeout
Stop Trip
is set to and , a
could possibly be increased.
6
6-5