7.5 Minor Faults/Alarms
290 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
Code Name Causes Possible Solutions
HCA High Current Alarm
The load is too heavy. • Decrease the load for applications with repetitive starts and
stops.
• Replace the drive with a larger capacity model.
The acceleration time is too short. • Calculate the torque necessary during acceleration related to
the load inertia and the specified acceleration time.
• Increase the values set in Acceleration Times C1-01, C1-03,
C1-05, or C1-07 [Accel Time 1 to Accel Time 4] until you get
the necessary torque.
• Increase the values set in Jerk Control C2-01 to C2-04
[Jerk@Start of Accel to Jerk@End of Decel] until you get the
necessary torque.
• Replace the drive with a larger capacity model.
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, the motor, and the drive to
make sure that the drive rated current is larger than the motor
rated current.
• Replace the drive with a larger capacity model.
The current level temporarily increased because of
speed search after a momentary power loss or while
trying to Auto Restart.
If speed search or Auto Restart cause an increase in current, the
drive can temporarily show this alarm. The time that the drive
shows the alarm is short. No more steps are necessary to clear the
alarm.
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, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = 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 [Ext24V Off Warning Display] to enable or disable L24v detection.
• The drive will not output an alarm signal for this alarm.
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 Selection = OFF].
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 6A [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = DataLog 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.Oper Setting = 0 h] to reset the cooling
fan operation time.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01, H2-02, and H2-03 =63 [Multi-Function Digital Output 1, Multi-Function Digital Output 2,
and Multi-Function Digital Output 3 = Maintenance] 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 the manufacturer or your
nearest sales representative.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01, H2-02, and H2-03 = 63 [Multi-Function Digital Output 1, Multi-Function Digital Output 2,
and Multi-Function Digital Output 3 = Maintenance] 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 the manufacturer or your
nearest sales representative.
Note:
When the estimated performance life is expired, the terminal assigned to H2-01, H2-02, and H2-03 = 63 [Multi-Function Digital Output 1, Multi-Function Digital Output 2,
and Multi-Function Digital Output 3 = Maintenance] 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, H2-02, and H2-03 = 63 [Multi-Function Digital Output 1, Multi-Function Digital Output 2,
and Multi-Function Digital Output 3 = Maintenance] will be ON.
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