GE AF-650 GP Design And Installation Manual page 116

Warnings and Alarms
DC backup supply is connected, the adjustable frequency
drive trips after a fixed time delay. The time delay varies
with unit size.
Troubleshooting
Make sure that the supply voltage matches the
adjustable frequency drive voltage.
Perform input voltage test.
Perform soft charge circuit test.
WARNING/ALARM 9, Inverter overload
The adjustable frequency drive is about to cut out because
of an overload (current too high for too long). The counter
for electronic, thermal inverter protection issues a warning
at 98% and trips at 100%, while giving an alarm. The
adjustable frequency drive cannot be reset until the
counter is below 90%.
The fault is that the adjustable frequency drive has run
with more than 100% overload for too long.
Troubleshooting
Compare the output current shown on the
keypad with the adjustable frequency 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
adjustable frequency drive continuous current
rating, the counter increases. When running
below the adjustable frequency drive continuous
current rating, the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection, the motor
is too hot. Select whether the adjustable frequency drive
issues a warning or an alarm when the counter reaches
100% in F-10 Electronic Overload . The fault occurs when
the motor runs with more than 100% overload 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 tunes the
adjustable frequency drive to the motor more
accurately and reduces thermal loading.
TM
AF-650 GP Design and Installation Guide
WARNING/ALARM 11, Motor thermistor over temp
The thermistor might be disconnected. Select whether the
adjustable frequency drive gives a warning or an alarm in
F-10 Electronic Overload .
Troubleshooting
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 s,
then the adjustable frequency drive trips and issues an
alarm. This fault may be caused by shock loading or quick
acceleration with high inertia loads. It may also appear
after kinetic backup if the acceleration during ramp-up is
quick. If extended mechanical brake control is selected, trip
can be reset externally.
DET-767A
Check for motor overheating.
Check if the motor is mechanically overloaded.
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 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.
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 F-12 Thermistor Resource
matches sensor wiring.
If using a KTY sensor, check the programming of
H-95 KTY Sensor Type, H-96 KTY Thermistor
Resource, and H-97 KTY Threshold level match
sensor wiring.
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.
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