GE AF-650 GP Programming Manual page 168

Troubleshooting
Check that the motor current set in P-03 Motor
Current is correct.
Ensure that Motor data in parameters P-02, P-03,
P-06, P-07, F-04 and F-05 are set correctly.
If an external fan is in use, check in F-11 Motor
External Fan that it is selected.
Running Auto tune in P-04 Auto Tune 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 F-10 Electronic Overload.
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 (analog voltage input) and
terminal 50 (+10 V supply). Also check that the
terminal switch for 53 or 54 is set for voltage.
Check F-12 Motor Thermistor Input 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 F-12 Motor Thermistor
Input selects terminal 18 or 19.
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in F-40 Torque Limiter
(Driving) or the value in F-41 Torque Limiter (Braking).
SP-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, extend the ramp time.
If the generator torque limit is exceeded during
ramp, extend the ramp time.
If torque limit occurs while running, possibly
increase the torque limit. Make sure that the
system can operate safely at a higher torque.
Check the application for excessive current draw
on the motor.
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 can be caused by shock loading or quick
acceleration with high inertia loads. It can also appear after
kinetic back-up if the acceleration during ramp up is quick.
AF-650 GP Programming Guide
If extended mechanical brake control is selected, trip can
be reset externally.
Troubleshooting
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
your GE supplier:
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 O-04 Control Word
Timeout Function is NOT set to [0] Off.
If O-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
DET-618C
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the frequency
converter.
Check parameters P-02, P-03, P-06, P-07, F-04 and
F-05 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.
ID-40 Drive Type
ID-41 Power Section
ID-42 Voltage
ID-43 Software Version
ID-45 Actual Typecode String
ID-49 SW ID Control Card
ID-50 SW ID Power Card
ID-60 Option Mounted
ID-61 Option SW Version (for each option slot)
Check connections on the serial communication
cable.
Increase O-03 Control Word Timeout Time
5 5
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