GE AF-650 GP Programming Manual page 193

Troubleshooting
WARNING/ALARM 9, Inverter overload
The frequency converter has run with more than 100%
overload for too long and is about to cut out. The counter
for electronic thermal inverter protection issues a warning
at 98% and trips at 100% with an alarm. The frequency
converter cannot be reset until the counter is below 90%.
Troubleshooting
•
Compare the output current shown on the
keypad with the frequency converter rated
current.
•
Compare the output current shown on the
5
5
keypad with the measured motor current.
•
Show the thermal frequency converter load on
the keypad 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, the motor
is too hot. Select whether the frequency converter issues a
warning or an alarm when the counter is >90% if
parameter F-10 Electronic Overload is set to warning
options, or whether the frequency converter trips when
the counter reaches 100% if parameter F-10 Electronic
Overload is set to trip options. 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
parameter P-03 Motor Current is correct.
•
Ensure that the 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 that it is
selected in parameter F-11 Motor External Fan.
•
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
Check whether the thermistor is disconnected. Select
whether the frequency converter issues a warning or an
alarm in parameter 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.
192
Check that parameter F-12 Motor Thermistor Input
selects terminal 53 or 54.
•
When using terminal 18, 19, 31, 32, or 33 (digital
inputs), check that the thermistor is connected
correctly between the digital input terminal used
(digital input PNP only) and terminal 50. Select
the terminal to use in parameter F-12 Motor
Thermistor Input.
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
•
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, 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 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
•
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.
ALARM 14, Earth (ground) fault
There is current from the output phase to ground, either in
the cable between the frequency converter and the motor,
or in the motor itself. Ground fault is detected by the
current transducers that measure current going out from
the frequency converter and current going into the
frequency converter from the motor. Ground fault is issued
if the deviation of the 2 currents is too large (the current
going out of the frequency converter should be the same
as the current going into the frequency converter).
02/2016 All rights reserved. DET-618D