7.5 Minor Faults/Alarms
278 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Code Name Causes Possible Solutions
FbH Excessive PID Feedback
The FbH detection level is set incorrectly. Adjust b5-36 [PID HiHi Limit Level] and b5-37 [PID HiHi
Time].
There is a problem with the PID feedback wiring. Correct errors with the PID control wiring.
The feedback sensor is not operating correctly. Examine the sensors on the control device side.
A fault occurred in the feedback input circuit of the
drive.
Replace the control board or the drive. For information about
replacing the control board, contact the manufacturer or your
nearest sales representative.
Note:
• The drive detects this fault if the PID feedback input is more than the level set in b5-36 for longer than b5-37.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].
Code Name Causes Possible Solutions
FbL PID Feedback Loss
The FbL detection level is set incorrectly. Adjust b5-13 [Fdback Loss Lvl] and b5-14 [Fdback Loss Time].
There is a problem with the PID feedback wiring. Correct errors with the PID control wiring.
The feedback sensor is not operating correctly. Examine the sensors on the control device side.
A fault occurred in the feedback input circuit of the
drive.
Replace the control board or the drive. For information about
replacing the control board, contact the manufacturer or your
nearest sales representative.
Note:
• The drive detects this error if the PID feedback input is lower than the level set in b5-13 for longer than b5-14.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
• If the drive detects this error, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].
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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
DataLog Error] will be ON.
To Next Page
Loading...
Need help?
General
