Danfoss VLT AQUA Drive FC 202 Design Manual page 199

General Specifications and ...
when the motor is overloaded by more than 100% for too
long.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
Check that the motor current set in 1-24 Motor
Current is correct.
•
Ensure that motor data in parameters 1-20
through 1-25 are set correctly.
•
If an external fan is in use, check in 1-91 Motor
External Fan that it is selected.
•
Run AMA in 1-29 Automatic Motor Adaptation
(AMA) tune the frequency converter to the motor
more accurately and reduce thermal loading.
WARNING/ALARM 11, Motor thermistor overtemp
The thermistor might be disconnected. Select whether the
frequency converter gives a warning or an alarm in
1-90 Motor Thermal Protection.
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 (analogue voltage input) and
terminal 50 (+10 V supply) and that the terminal
switch for 53 or 54 is set for voltage. Check that
1-93 Thermistor Source selects terminal 53 or 54.
•
When using digital inputs 18 or 19, check that
the thermistor is connected correctly between
either terminal 18 or 19 (digital input PNP only)
and terminal 50. Check 1-93 Thermistor Source
selects terminal 18 or 19.
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 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, possibly
increase the torque limit. Be sure the system can
operate safely at a higher torque.
•
Check the application for excessive current draw
on the motor.
MG20Z202
Design Guide
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 frequency converter trips and issues an alarm.
This fault may be caused by shock loading or fast
acceleration with high inertia loads. If extended mechanical
brake control is selected, trip can be reset externally.
Troubleshooting
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ALARM 14, Earth (ground) fault
There is current from the output phases to earth, either in
the cable between the frequency converter and the motor
or in the motor itself.
Troubleshooting
•
•
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.
Remove power to the frequency converter and repair the
short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning is only active when 8-04 Control Timeout
Function is not set to OFF.
If 8-04 Control Timeout Function is set to Stop and Trip, a
warning appears and the frequency converter ramps down
until it stops then displays an alarm.
Danfoss A/S © Rev. 06/2014 All rights reserved.
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the frequency
converter.
Check parameters 1-20 through 1-25 for correct
motor data.
Remove power to the frequency converter and
repair the earth fault.
Check for earth faults in the motor by measuring
the resistance to ground of the motor leads and
the motor with a megohmmeter.
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)
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