Danfoss FC 102 Operating Instructions Manual page 69

Warnings and Alarms
Troubleshooting
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Check for motor overheating.
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Check if the motor is mechanically overloaded.
•
Check that the motor current set in 1-24 Motor
Current is correct
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Ensure that motor data in parameters 1-20 to
1-25 are set correctly.
•
If an external fan is in use, ensure that is is
selected in 1-91 Motor External Fan.
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Running AMA in 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
The thermistor might be disconnected. Select whether the
frequency converter gives a warning or an alarm in
1-90 Motor Thermal Protection.
Troubleshooting
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Check for motor overheating
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Check if the motor is mechanically overloaded
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Check that the thermistor is connected correctly
between either terminal 53 or 54 (analog voltage
input) and terminal 50 (+10 V supply) and that
the terminal switch for 53 or 54 is set for voltage.
Check 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
•
If a KTY sensor is used, check for correct
connection between terminals 54 and 55
•
If using a thermal switch or thermistor, check that
the programming if 1-93 Thermistor Source
matches sensor wiring
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.
MG16D302
Operating Instructions
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 ground, either
in the cable between the frequency converter and the
motor or in the motor itself.
Troubleshooting
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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 Danfoss supplier:
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ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
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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 [5] Stop and trip, a
warning appears and the frequency converter ramps down
until it trips 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 to 1-25 for correct motor
data.
Remove power to the frequency converter 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.
Perform current sensor test.
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 power to the frequency converter and
repair the short circuit.
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