YASKAWA GA700 Technical Manual page 302

6.5 Minor Faults/Alarms
Code Name
Note:
• Detected if PID feedback input is lower than the level set in b5-13 [PID Feedback Loss Detection Lvl] for longer than b5-14 [PID
Feedback Loss Detection Time].
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in b5-12 [Feedback Loss Detection Select].
Code Name
HCA Current Alarm
Note:
• Detected if the drive output current exceeded the overcurrent alarm level (150% of the rated current).
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
Code Name
L24v External Power 24V Supply The voltage of the external 24 V power
Note:
The minor fault signal is not output when a minor fault is detected even after setting o2-23 = 1 [Lost Detection of Ext. Power 24V =
Enabled].
Code Name
LoG Log Communication Fault
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
302
Cause
A fault occurred in the feedback input
circuit of the drive.
Cause
The load is too heavy.
The acceleration/deceleration time is too
short.
The drive is attempting to operate a
specialized motor or a motor that
exceeds the maximum applicable motor
output of the drive.
The current level increased temporarily
due to speed search after a momentary
power loss or while attempting to
perform Auto Restart.
Cause
supply being used as a backup power
supply has dropped. The main circuit
power supply is in its normal state.
Cause
A micro SD card is not inserted into the
keypad.
• USB connected
• The number of log communication
files has grown to 1000 or higher.
• The capacity of the micro SD card
has been exceeded.
• Attributes 1 and 2 were written to a
file with a log communication file
number that does not exist.
• The line number data in a log
communication file was modified.
• A log end command was transmitted
despite the fact that the log
communication file was closed.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Possible Solution
Replace the board or the entire drive. For
instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Possible Solution
• Reduce the load for applications with repetitive
starts and stops.
• Replace the drive with a larger capacity model.
• Calculate the torque necessary during
acceleration relative to the load inertia and the
specified acceleration time.
• Increase the value set in C1-01 to C1-08
[Acceleration/Deceleration Time] until the
necessary torque is achieved.
• Replace the drive with a larger capacity model.
• Check the motor nameplate and reevaluate the
motor and drive to ensure that the drive rated
current is larger than the motor rated current.
• Replace the drive with a larger capacity model.
If a rise in current occurs due to a speed search or
Auto Restart, HCA may be temporarily displayed.
The alarm will only appear briefly. There is no
need to take action to prevent the alarm from
occurring in such instances.
Possible Solution
• Check for any wiring errors or disconnected
wires in the external 24 V power supply, and fix
any problems.
• Check for any problems with the external 24 V
power supply.
• Set o2-23 = 0 [Lost Detection of Ext. Power 24V
= Disabled].
Possible Solution
Insert a micro SD card into the keypad.
Set o5-01 = 1 [Log Start/Stop Selection = ON].