Danfoss vlt FC 102 User Guide

options, or whether the frequency converter trips when
the counter reaches 100% if parameter 1-90 Motor Thermal
Protection is set to trip options. The fault occurs when the
motor runs with more than 100% overload for too long.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
Check that the motor current set in
parameter 1-24 Motor Current is correct.
•
Ensure that the motor data in parameters 1-20 to
1-25 are set correctly.
•
If an external fan is in use, check that it is
selected in parameter 1-91 Motor External Fan.
•
Running AMA in parameter 1-29 Automatic Motor
Adaptation (AMA) tunes the frequency converter
to the motor more accurately and reduces
thermal loading.
WARNING/ALARM 11, Motor thermistor overtemp
Check that the thermistor is not disconnected. In
parameter 1-90 Motor Thermal Protection, select whether
the drive system issues a warning or an alarm.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
When using terminal 53 or 54, check that the
thermistor is connected correctly between either
terminal 53 or 54 (analog voltage input) and
terminal 50 (+10 V supply). Also check that the
terminal switch for 53 or 54, whichever is
connected, is set for voltage. Check that
parameter 1-93 Thermistor Source selects the
connected terminal, 53 or 54.
•
When using terminal 18, 19, 31, 32, or 33 (digital
inputs), check that the thermistor is connected
correctly between the digital input terminal used
(digital input PNP only) and terminal 50. Select
the terminal to use in parameter 1-93 Thermistor
Source.
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in
parameter 4-16 Torque Limit Motor Mode or the value in
parameter 4-17 Torque Limit Generator Mode.
Parameter 14-25 Trip Delay at Torque Limit can change this
warning from a warning-only condition to a warning
followed by an alarm.
Troubleshooting
•
If the motor torque limit is exceeded during
ramp-up, extend the ramp-up time.
•
If the generator torque limit is exceeded during
ramp-down, extend the ramp-down time.
•
If torque limit occurs while running, increase the
torque limit. Make sure that the system can
operate safely at a higher torque.
•
Check the application for excessive current draw
on the motor.
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts approximately
1.5 s, then the drive system trips and issues an alarm.
Shock loading or quick acceleration with high-inertia loads
can cause this fault. If the acceleration during ramp-up is
too quick, the fault can also appear after kinetic back-up.
If extended mechanical brake control is selected, a trip can
be reset externally.
Troubleshooting
•
Remove the power and check if the motor shaft
can be turned.
•
Check that the motor size matches the drive
system.
•
Check that the motor data is correct in
parameters 1-20 to 1-25.
ALARM 14, Earth (ground) fault
There is current from the output phase to ground, either in
the cable between the drive system and the motor, or in
the motor itself. Ground faults are detected by the current
transducers that measure the current going out from the
drive system and the current going into the drive system
from the motor. A ground fault is issued if the deviation of
the 2 currents is too large (the current going out of the
drive system must be the same as the current going into
the drive system).
Troubleshooting
•
Remove the power to the drive system and then
repair the ground fault.
•
Check for ground faults in the motor by
measuring the resistance to ground of the motor
cables and the motor with a megohmmeter.
•
Reset any potential individual oset in the 3
current transducers in the drive module by
performing the manual initialization or a
complete AMA. This method is most relevant
after changing the power card.
•
Check the MDCIC on the control shelf for the
correct number of current scaling cards. The
number of current scaling cards must be equal to
the number of connected drive modules in the
drive system.
•
Check the connections at the current scaling
cards on the MDCIC.
ALARM 15, Hardware mismatch
A tted option is not operational with the present control
card hardware or software.
Maintenance, Diagnostics, a... User Guide
MG37L202 Danfoss A/S © 08/2017 All rights reserved. 41
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Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English