GE AF-650 GP Operating Instructions Manual page 56

Warnings and Alarms
Troubleshooting
Compare the output current shown on the
Keypad with the drive rated current.
Compare the output current shown on the
Keypad with measured motor current.
Display the Thermal Drive Load on the Keypad
and monitor the value. When running above the
drive continuous current rating, the counter
should increase. When running below the drive
continuous current rating, the counter should
decrease.
See the derating section in the Design Guide for more
details if a high switching frequency is required.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection, the motor
is too hot. Select whether the drive gives a warning or an
alarm when the counter reaches 100% in F-10 Electronic
Overload. The fault occurs 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 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 may tune
the drive to the motor more accurately and
reduce thermal loading.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor might be disconnected. Select whether the
drive gives 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 (+10V supply) and 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.
AF-650 GP Operating Instructions
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
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts about 1.5
secs., then the drive 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:
ALARM 14, Earth (ground) fault
There is current from the output phases to earth, either in
the cable between the drive 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:
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. Be sure the system can
operate safely at a higher torque.
Check the application for excessive current draw
on the motor.
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the drive.
Check parameters P-02, P-03, P-06, P-07, F-04 and
F-05. for correct motor data.
Remove power to the drive 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
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