Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual page 56

FC 300 Operating Instructions
when the counter reaches 100% in par. 1-90.
Check that the thermistor is connected correctly
between terminal 53 or 54 (analogue voltage input)
and terminal 50 (+ 10 Volts supply), or between
terminal 18 or 19 (digital input PNP only) and
terminal 50. If a KTY sensor is 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 operation).
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 externally.
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: 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 timeout:
There is no communication to the frequency
converter.
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 frequency converter ramps down
until it trips, while giving an alarm.
par. 8-03 Control word Timeout Time could possibly
be increased.
WARNING 25
Brake resistor short-circuited:
The brake resistor is monitored during operation. If
it short-circuits, the brake function is disconnected
56
Troubleshooting
and the warning appears. The frequency converter
still works, but without the brake function. Turn
off the frequency converter 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, 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 Trip
[2] has been selected in par. 2-13, the frequency
converter cuts out and issues this alarm, when the
dissipated braking power is higher than 100%.
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.
short-circuited.
ALARM/WARNING 28
Brake check failed:
Brake resistor fault: the brake resistor is not
connected/working.
ALARM 29
Drive over temperature:
If the enclosure is IP 20 or IP 21/TYPE 1, the
cut-out temperature of the heat-sink is 95
o
temperature of the heatsink is below 70
The fault could be:
-
-
ALARM 30
Motor phase U missing:
Motor phase U between the frequency converter
and the the motor is missing.
Turn off the frequency converter and check motor
phase U.
MG.33.A2.02 - VLT is a registered Danfoss trademark
Warning: There is a risk of substantial
power being transmitted to the brake
resistor if the brake transistor is
C. The temperature fault cannot be reset, until the
Ambient temperature too high
Too long motor cable
o
C +5
o o
C +5 C.