6.5 Minor Faults/Alarms
368 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Code Name Causes Possible Solutions
LoG Com Error / Abnormal SD
card
There is not a micro SD in the keypad. Put a micro SD card in the keypad.
• The drive is connected to USB.
• The number of log communication
files is more than 1000.
• The micro SD card does not have
available memory space.
• The line number data in a log
communication file was changed.
• A communication error between the
keypad and drive occurred during a
log communication.
Set o5-01 = 0 [Log Start/Stop Selection = OFF].
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 6A [MFDO Function Select = Data Logger Error] will be ON.
Code Name Causes Possible Solutions
LT-1 Cooling Fan Maintenance
Time
The cooling fan is at 90% of its
expected performance life.
1. Use the procedures in this manual to replace the
cooling fan.
2. Set o4-03 = 0 [Fan Operation Time Setting = 0
h] to reset the cooling fan operation time.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance
Notification] will be ON.
Code Name Causes Possible Solutions
LT-2 Capacitor Maintenance
Time
The capacitors for the main circuit and
control circuit are at 90% of expected
performance life.
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance
Notification] will be ON.
Code Name Causes Possible Solutions
LT-3 SoftChargeBypassRelay
MainteTime
The soft charge bypass relay is at 90%
of its expected performance life.
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance
Notification] will be ON.
Code Name Causes Possible Solutions
LT-4 IGBT Maintenance Time
(50%)
The IGBT is at 50% of its expected
performance life.
Check the load, carrier frequency, and output
frequency.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance
Notification] will be ON.
Code Name Causes Possible Solutions
oH Heatsink Overheat The ambient temperature is high and the
heatsink temperature is more than the
L8-02 [Overheat Alarm Level].
• Measure the ambient temperature.
• Increase the airflow around the drive.
• Install a cooling device (cooling fan or air
conditioner) to lower the ambient temperature.
• Remove objects near the drive that are producing
too much heat.
There is not sufficient airflow around
the drive.
• Give the drive the correct installation space as
shown in the manual.
• Make sure that there is sufficient circulation
around the control panel.
• Examine the drive for dust or other unwanted
materials that could clog the cooling fan.
• Remove unwanted materials that prevent air
circulation.
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