YASKAWA GA700 Technical Manual page 367

Code Name
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 detected, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = 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 [Feedback Loss Detection Select].
Code Name
FbL PID Feedback Loss
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 to H2-03 = 10 [MFDO Function Select = 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 [Feedback Loss Detection Select].
Code Name
HCA High Current 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 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name
L24v Loss of External Power 24
Supply
Note:
• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.
• A minor fault signal will not be output even if the drive detects this alarm.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Causes
A fault occurred in the feedback input
circuit of the drive.
Causes
The FbL detection level is set
incorrectly.
There is a problem with the PID
feedback wiring.
The feedback sensor is not operating
correctly.
A fault occurred in the feedback input
circuit of the drive.
Causes
The load is too heavy.
The acceleration time is too short.
The drive is trying to operate a
specialized motor or a motor that is
larger than the maximum applicable
motor output of the drive.
The current level temporarily increased
because of speed search after a
momentary power loss or while trying
to Auto Restart.
Causes
The voltage of the external 24 V power
supply being used as a backup power
supply has dropped. The main circuit
power supply is in its normal state.
6.5 Minor Faults/Alarms
Possible Solutions
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Possible Solutions
Adjust b5-13 [PID Feedback Loss Detection Lvl]
and b5-14 [PID Feedback Loss Detection Time].
Correct errors with the PID control wiring.
Examine the sensors on the control device side.
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Possible Solutions
• Decrease the load for applications with repetitive
starts and stops.
• Replace the drive with a larger capacity model.
• Calculate the torque necessary during
acceleration related to the load inertia and the
specified acceleration time.
• Increase the values set in C1-01, C1-03, C1-05,
or C1-07 [Acceleration Times] until you get the
necessary torque.
• Increase the values set in C2-01 to C2-04 [S-
Curve Characteristics] until you get the
necessary torque.
• Replace the drive with a larger capacity model.
• 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.
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.
Possible Solutions
• Examine for wiring errors or disconnected wires
in the external 24 V power supply, and repair
problems.
• Examine for problems in the external 24 V
power supply.
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