YASKAWA CR700, Техническое руководство, Страница: 368 / 886

6.5 Minor Faults/Alarms
368 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Code Name Causes Possible Solutions
The drive is trying to operate a specialized motor or
a motor that is larger than the maximum applicable
motor output of the drive.
• Examine the motor nameplate and reevaluate the motor and
drive to make sure that the drive rated current is larger than the
motor rated current.
• Replace the drive with a larger capacity model.
Note:
• The drive detects this error if the drive output current is more than the overcurrent alarm level (150% of the rated current).
• If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
L24v Loss of External Power 24 Supply
The voltage of the backup 24 V power supply has
decreased. The main circuit power supply is
operating correctly.
• Examine the external 24 V power supply for disconnected
wires and wiring errors and repair the problems.
• Examine the external 24 V power supply for problems.
Note:
• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.
• The drive will not output an alarm signal for this alarm.
Code Name Causes Possible Solutions
LoG Log Com Error
There is not a micro SD in the keypad. Put a micro SD card in the keypad.
• USB connected
• The number of log communication files is more
than 1000.
• The capacity of the micro SD card has been
exceeded.
• The line number data in a log communication
file is incorrect.
• 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 H2-05 = 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 H2-05 = 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 H2-05 = 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 H2-05 = 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 H2-05 = 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
L8-02 [Overheat Alarm
Level] .
• Measure the ambient temperature.
• Increase the airflow in the control panel.
• 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.