GE AF-650 GP Design And Installation Manual page 106

Warnings and Alarms
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Ensure that the motor data in parameters P-02,
P-03, P-06, P-07, F-04, and F-05 are set correctly.
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If an external fan is in use, check that it is
selected in parameter F-11 Motor External Fan.
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Running Auto tune in parameter P-04 Auto Tune
tunes the frequency converter to the motor more
accurately and reduces thermal loading.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor may be disconnected. Select whether the
frequency converter issues a warning or an alarm in
parameter F-10 Electronic Overload.
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). Also check
that the terminal switch for 53 or 54 is set for
voltage. Check that parameter F-12 Motor
Thermistor Input is set to terminal 53 or 54.
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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.
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If a KTY Sensor is used, check for correct
connection between terminals 54 and 55.
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If using a thermal switch or thermistor, check that
the programming of parameter F-12 Motor
Thermistor Input matches sensor wiring.
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If using a KTY Sensor, check the programming of
parameter H-95 KTY Sensor Type,
parameter H-96 KTY Thermistor Input, and
parameter H-97 KTY Threshold level match sensor
wiring.
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in
parameter F-40 Torque Limiter (Driving) or the value in
parameter F-41 Torque Limiter (Braking). Parameter SP-25 Trip
Delay at Torque Limit can change this warning 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, extend the ramp time.
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If the generator torque limit is exceeded during
ramp, extend the ramp time.
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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.
MG35M402
AF-650 GP™ Design and Installation Guide
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts approximately
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, a 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
GE:
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ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
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DET-767c All rights reserved.
Remove the power and check if the motor shaft
can be turned.
Check that the motor size matches the frequency
converter.
Check that the motor data is correct in
parameters P-02, P-03, P-06, P-07, F-04, and F-05.
Remove the power to the frequency converter
and repair the ground fault.
Check for ground faults in the motor by
measuring the resistance to the ground of the
motor cables and the motor with a
megohmmeter.
Perform a current sensor test.
Parameter ID-40 Drive Type.
Parameter ID-41 Power Section.
Parameter ID-42 Voltage.
Parameter ID-43 Software Version.
Parameter ID-45 Actual Typecode String.
Parameter ID-49 SW ID Control Card.
Parameter ID-50 SW ID Power Card.
Parameter ID-60 Option Mounted.
Parameter ID-61 Option SW Version (for each
option slot).
Remove the power to the frequency converter
and repair the short circuit.
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