Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 44

Maintenance, Diagnostics an...
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If using a KTY sensor, check the programming of
parameter 1-95 KTY Sensor Type, and
parameter 1-97 KTY Threshold level match sensor
wiring.
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
from a warning-only condition to a warning followed by an
alarm.
Troubleshooting
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If the motor torque limit is exceeded during
ramp-up, extend the ramp-up time.
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If the generator torque limit is exceeded during
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ramp down, extend the ramp-down time.
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If torque limit occurs while running, possibly
increase the torque limit. Be sure that the system
can operate safely at a higher torque.
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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 about 1.5 s,
then the adjustable frequency drive trips and issues an
alarm. Shock loading or fast acceleration with high-inertia
loads can cause this fault. If extended mechanical brake
control is selected, the trip can be reset externally.
Troubleshooting
•
Remove power and check if the motor shaft can
be turned.
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Make sure that the motor size matches the
adjustable frequency drive.
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Check parameters 1-20 to 1-25 for correct motor
data.
ALARM 14, Earth (ground) fault
There is current from the output phases to ground, either
in the cable between the adjustable frequency drive and
the motor or in the motor itself.
Troubleshooting
•
Remove power from the adjustable frequency
drive and repair the ground fault.
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Check for ground faults in the motor by
measuring the resistance to ground of the motor
leads and the motor with a megohmmeter.
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Perform current sensor test.
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VLT AQUA Drive FC 202
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
the local Danfoss supplier:
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ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
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WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning is only active when parameter 8-04 Control
Word Timeout Function is NOT set to [0] Off.
If parameter 8-04 Control Word Timeout Function is set to [5]
Stop and trip, a warning appears and the frequency
converter ramps down until it trips, then it displays an
alarm.
Troubleshooting
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WARNING/ALARM 22, Hoist mechanical brake
When this warning is active, the LCP shows the type of
issue.
0 = The torque ref. was not reached before timeout.
1 = There was no brake feedback before timeout.
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Parameter 15-40 FC Type.
Parameter 15-41 Power Section.
Parameter 15-42 Voltage.
Parameter 15-43 Software Version.
Parameter 15-45 Actual Typecode String.
Parameter 15-49 SW ID Control Card.
Parameter 15-50 SW ID Power Card.
Parameter 15-60 Option Mounted.
Parameter 15-61 Option SW Version (for each
option slot).
Remove power from the frequency converter and
repair the short circuit.
Check the connections on the serial communi-
cation cable.
Increase parameter 8-03 Control Word Timeout
Time.
Check the operation of the communication
equipment.
Verify a proper installation based on EMC
requirements.
MG20MC22