Danfoss VLT AutomationDrive FC 301 Instruction Manual page 45

Maintenance, Diagnostics an...
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in 4-16 Torque Limit
Motor Mode or the value in 4-17 Torque Limit Generator
Mode. 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.
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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.
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Check the application for excessive current draw
on the motor.
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts approxi-
mately 1.5 s, then the adjustable frequency drive 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 quick, the fault can also appear after
kinetic backup.
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.
•
Make sure that the motor size matches the
adjustable frequency drive.
•
Check that the motor data is correct in
parameters 1-20 to 1-25.
ALARM 14, 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 to the adjustable frequency drive
and repair the ground fault.
•
Check for ground faults in the motor by
measuring the resistance to ground of the motor
leads and the motor with a megohmmeter.
MG33AP22
Instruction Manual
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
Danfoss:
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ALARM 16, Short-circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
WARNING/ALARM 17, Control word timeout
There is no communication to the adjustable frequency
drive.
The warning is only active when 8-04 Control Word Timeout
Function is NOT set to [0] Off.
If 8-04 Control Word Timeout Function is set to [5] Stop and
Trip, a warning appears and the adjustable frequency drive
ramps down until it stops, and then it displays an alarm.
Troubleshooting
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WARNING/ALARM 20, Temp. input error
The temperature sensor is not connected.
WARNING/ALARM 21, Parameter error
The parameter is out of range. The parameter number is
reported in the display.
Troubleshooting
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Danfoss A/S © Rev. 09/2014 All rights reserved.
15-40 FC Type
15-41 Power Section
15-42 Voltage
15-43 Software Version
15-45 Actual Typecode String
15-49 SW ID Control Card
15-50 SW ID Power Card
15-60 Option Mounted
15-61 Option SW Version (for each option slot)
Remove the power to the adjustable frequency
drive and repair the short circuit.
Check the connections on the serial communi-
cation cable.
Increase 8-03 Control Word Timeout Time.
Check the operation of the communication
equipment.
Verify a proper installation based on EMC
requirements.
The affected parameter must be set to a valid
value.
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