YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
153
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
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.
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.
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.
LoG
Log Com Error
There is not a micro SD card 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.
•
There was a communication error between the
keypad and drive during a log communication.
Set
o5-01 = 0 [Log Start/Stop Selection = OFF]
.
You used a keypad that does not support short-term
data logging and started short-term data logging.
•
Use a keypad that supports short-term data logging.
•
Set
o5-00 = 0 [Log Type = Long Term Log]
.
•
Set
o5-01 = 0 [Log Start/Stop Selection = OFF]
.
LT-1
Cooling Fan Maintenance Time
The cooling fan is at 90% of its expected performance
life.
1.
Replace the cooling fan.
2.
Set
o4-03 = 0 [Fan Operation Time Setting = 0 h]
to reset the
cooling fan operation time.
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.
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.
LT-4
IGBT Maintenance Time (50%)
The IGBT is at 50% of its expected performance life.
Check the load, carrier frequency, and output frequency.
oH
Heatsink Overheat
The ambient temperature is high and the heatsink
temperature is more than the
L8-02 [Overheat Alarm
Level]
.
•
Measure the ambient temperature.
•
Increase the airflow around the drive.
•
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.
The internal cooling fan or fans have stopped.
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.
oH2
External Overheat (H1-XX=B)
An external device sent an
oH2
.
1.
Find the external device that output the overheat alarm.
2.
Remove the cause of the problem.
3.
Clear the
Overheat Alarm (oH2) [H1-xx = B]
that was set to
MFDI terminals S1 to S6.
oH3
Motor Overheat (PTC Input)
The thermistor wiring that detects motor temperature
is defective.
Correct wiring errors.