GE AF-600 FP Design Manual page 165

7.7.5 Fault Messages
WARNING 1, 10 volts low
The control card voltage is below 10 V from terminal 50.
Remove some of the load from terminal 50, as the 10 V supply is overloaded.
Max. 15 mA or minimum 590 Ω.
This condition can be caused by a short in a connected potentiometer or
improper wiring of the potentiometer.
Troubleshooting: Remove the wiring from terminal 50. If the warning clears,
the problem is with the customer wiring. If the warning does not clear, replace
the control card.
WARNING/ALARM 2, Live zero error
This warning or alarm will only appear if programmed by the user in
par. AN-01 Live Zero Timeout Function. The signal on one of the analog inputs
is less than 50% of the minimum value programmed for that input. This con-
dition can be caused by broken wiring or faulty device sending the signal.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the frequency converter. This
warning or alarm will only appear if programmed by the user in
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par. H-80 Function at Stop.
Troubleshooting: Check the connection between the drive and the motor.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the mains voltage imbalance is too
high. This message also appears for a fault in the input rectifier on the fre-
quency converter. Options are programmed at par. SP-12 Function at Line
Imbalance.
Troubleshooting: Check the supply voltage and supply currents to the fre-
quency converter.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher than the high voltage warning
limit. The limit is dependent on the drive voltage rating. The frequency con-
verter is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is lower than the low voltage warning
limit. The limit is dependent on the drive voltage rating. The frequency con-
verter is still active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the frequency converter
trips after a time.
Troubleshooting:
Extend the ramp time
Change the ramp type
Activate functions in par. B-10 Brake Function
Increase par. SP-26 Trip Delay at Drive Fault
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC) drops below the under voltage limit,
the frequency converter checks if a 24 V backup supply is connected. If no 24
V backup supply is connected, the frequency converter trips after a fixed time
delay. The time delay varies with unit size.
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WARNING/ALARM 9, Inverter overloaded
The frequency converter is about to cut out because of an overload (too high
current for too long). The counter for electronic, thermal inverter protection
gives a warning at 98% and trips at 100%, while giving an alarm. The fre-
quency converter cannot be reset until the counter is below 90%.
The fault is that the frequency converter is overloaded by more than 100%
for too long. Note: 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 frequency converter gives a warning or an alarm when the
counter reaches 100% in par. F-10 Electronic Overload . The fault is that the
motor is overloaded by more than 100% for too long.
Troubleshooting:
Check if motor is over heating.
If the motor is mechanically overloaded
That the motor par. P-03 Motor Current is set correctly.
Motor data in parameters P-02, P-03, P-06, P-07, F-04 and F-05 are
set correctly.
The setting in par. F-11 Motor External Fan.
Run Auto tune in par. P-04 Auto Tune.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor or the thermistor connection is disconnected. Select whether
the frequency converter gives a warning or an alarm when the counter rea-
ches 100% in par. F-10 Electronic Overload .
Troubleshooting:
Check if motor is over heating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly between terminal
53 or 54 (analog voltage input) and terminal 50 (+10 V supply), or
between terminal 18 or 19 (digital input PNP only) and terminal 50.
If using a thermal switch or thermistor, check the programming of
par. F-12 Motor Thermistor Input matches sensor wiring.
WARNING/ALARM 12, Torque limit
The torque is higher than the value in par. F-40 Torque Limiter (Driving) (in
motor operation) or the torque is higher than the value in par. F-41 Torque
Limiter (Braking) (in regenerative operation). Par. SP-25 Trip Delay at Torque
Limit can be used to change this from a warning only condition to a warning
followed by an alarm.
WARNING/ALARM 13, Over Current
The inverter peak current limit (approx. 200% of the rated current) is exceeded.
The warning lasts about 1.5 sec., then the frequency converter trips and issues
an alarm.
ALARM 14, Earth (ground) fault
There is a discharge from the output phases to earth, either in the cable be-
tween the frequency converter and the motor or in the motor itself.
Troubleshooting:
Turn off the frequency converter and remove the earth fault.
Measure the resistance to ground of the motor leads and the motor
with a megohmmeter to check for earth faults in the motor.
AF-600 FP Design Guide