Danfoss VLT DriveMotor FCP 106 Programming Manual page 98

Diagnostics and Troubleshoo...
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Perform soft charge circuit test.
WARNING/ALARM 9, Inverter overload
The frequency converter is about to cut out because of an
overload (too high current for too long). The counter for
electronic, thermal inverter protection issues a warning at
98% and trips at 100%, while giving an alarm. The
frequency converter cannot be reset until the counter is
below 90%.
The fault is that the frequency converter has run with
more than 100% overload for too long.
Troubleshooting
5 5
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Compare the output current shown on the LCP
with the frequency converter rated current.
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Compare the output current shown on the LCP
with measured motor current.
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Display the thermal drive load on the LCP and
monitor the value. When running above the
frequency converter continuous current rating,
the counter increases. When running below the
frequency converter continuous current rating,
the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter
issues a warning or an alarm when the counter reaches
100% in 1-90 Motor Thermal Protection. The fault occurs
when the motor runs with more than 100% overload for
too long.
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 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.
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If an external fan is in use, check in 1-91 Motor
External Fan that it is selected.
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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 over temp
Check whether the thermistor is disconnected. Select
whether the frequency converter issues 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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When using terminal 53 or 54, check that the
thermistor is connected correctly between either
terminal 53 or 54 (analog voltage input) and
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VLT DriveMotor FCP 106 and FCM 106 Programming Guide
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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.
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 back-up. If
extended mechanical brake control is selected, trip can be
reset externally.
Troubleshooting
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ALARM 14, Earth 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 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 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 frequency converter ramps
down until it stops then displays an alarm.
Troubleshooting
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MG03N102 - Rev. 2013-12-02
terminal 50 (+10 V supply). Also check 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. Check 1-93 Thermistor Source
selects terminal 18 or 19.
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 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.
Check connections on the serial communication
cable.
Increase 8-03 Control Word Timeout Time